10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2023

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number: 001-33225

 

Great Lakes Dredge & Dock Corporation

(Exact name of registrant as specified in its charter)

Delaware	20-5336063
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

9811 Katy Freeway, Suite 1200, Houston, TX	77024
(Address of principal executive offices)	(Zip Code)

(346) 359-1010

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, (Par Value $0.0001)	GLDD	Nasdaq Stock Market, LLC

Securities registered pursuant to section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐ No ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☒
Non-accelerated filer	☐	Smaller reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

The aggregate market value of voting stock held by non-affiliates of the Registrant was $525,165,618 at June 30, 2023. The aggregate market value was computed using the closing price of the common stock as of June 30, 2023 on the Nasdaq Stock Market. (For purposes of calculating the foregoing amount only, all directors and executive officers of the registrant have been treated as affiliates.)

As of February 13, 2024, 66,623,207 shares of Registrant’s Common Stock, par value $.0001 per share, were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Part of 10-K	Documents Incorporated by Reference
Part III	Portions of the Proxy Statement to be filed with the Securities and Exchange Commission in connection with the 2024 Annual Meeting of Stockholders.

TABLE OF CONTENTS

PART I
Item 1.		Business	2
Item 1A.		Risk Factors	11
Item 1B.		Unresolved Staff Comments	29
Item 1C.	Cybersecurity		29
Item 2.		Properties	30
Item 3.		Legal Proceedings	30
Item 4.		Mine Safety Disclosures	30
PART II
Item 5.		Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	31
Item 6.		[Reserved]	32
Item 7.		Management’s Discussion and Analysis of Financial Condition and Results of Operations	33
Item 7A.		Quantitative and Qualitative Disclosures about Market Risk	44
Item 8.		Financial Statements and Supplementary Data	44
Item 9.		Changes in and Disagreements With Accountants on Accounting and Financial Disclosure	44
Item 9A.		Controls and Procedures	44
Item 9B.		Other Information	48
Item 9C.		Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	48
PART III
Item 10.		Directors, Executive Officers and Corporate Governance	49
Item 11.		Executive Compensation	49
Item 12.		Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	49
Item 13.		Certain Relationships and Related Transactions, and Director Independence	49
Item 14.		Principal Accounting Fees and Services	49
PART IV
Item 15.		Exhibits, Financial Statement Schedules	50
Item 16.		Form 10-K Summary	50
SIGNATURES			83

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Cautionary Note Regarding Forward-Looking Statements

Certain statements in this Annual Report on Form 10-K may constitute “forward-looking” statements as defined in Section 27A of the Securities Act of 1933 (the “Securities Act”), Section 21E of the Securities Exchange Act of 1934 (the “Exchange Act”), the Private Securities Litigation Reform Act of 1995 (the “PSLRA”) or in releases made by the Securities and Exchange Commission (“SEC”), all as may be amended from time to time. Such forward-looking statements involve known and unknown risks, uncertainties and other important factors that could cause the actual results, performance or achievements of Great Lakes Dredge & Dock Corporation and its subsidiaries (“Great Lakes”), or industry results, to differ materially from any future results, performance or achievements expressed or implied by such forward-looking statements. Statements that are not historical fact are forward-looking statements. Forward-looking statements can be identified by, among other things, the use of forward-looking language, such as the words “plan,” “believe,” “expect,” “anticipate,” “intend,” “estimate,” “project,” “may,” “would,” “could,” “should,” “seeks,” or “scheduled to,” or other similar words, or the negative of these terms or other variations of these terms or comparable language, or by discussion of strategy or intentions.

These cautionary statements are being made pursuant to the Securities Act, the Exchange Act and the PSLRA with the intention of obtaining the benefits of the “safe harbor” provisions of such laws. Great Lakes cautions investors that any forward-looking statements made by Great Lakes are not guarantees or indicative of future performance. Important assumptions and other important factors that could cause actual results to differ materially from those forward-looking statements with respect to Great Lakes, include, but are not limited to, risks and uncertainties that are described in Item 1A. “Risk Factors” of this Annual Report on Form 10-K for the year ended December 31, 2023, and in other securities filings by Great Lakes with the SEC.

Although Great Lakes believes that our plans, intentions and expectations reflected in or suggested by such forward-looking statements are reasonable, actual results could differ materially from a projection or assumption in any forward-looking statements. Great Lakes’ future financial condition and results of operations, as well as any forward-looking statements, are subject to change and inherent risks and uncertainties. The forward-looking statements contained in this Annual Report on Form 10-K are made only as of the date hereof and we do not have or undertake any obligation to update or revise any forward-looking statements whether as a result of new information, subsequent events or otherwise, unless otherwise required by law.

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Part I

Item 1. Business.

The terms “we,” “our,” “ours,” “us,” “Great Lakes”, “GLDD” and “Company” refer to Great Lakes Dredge & Dock Corporation and its subsidiaries.

Organization

Great Lakes is the largest provider of dredging services in the United States which is complemented with a long history of performing significant international projects. The Company is also fully engaged in expanding its core business into the rapidly developing offshore wind energy industry.

The Company was founded in 1890 as Lydon & Drews Partnership and performed its first project in Chicago, Illinois. The Company changed its name to Great Lakes Dredge & Dock Company in 1905 and was involved in a number of marine construction and landfill projects along the Chicago lakefront and in the surrounding Great Lakes region. The Company now operates on the East and Gulf coastlines and throughout many inland U.S. waterways. Since its founding, Great Lakes has been a leader in the building and maintenance of the nation's navigation system, the protection of shore lines, the restoration of sensitive habitats and the creation of critical aquatic infrastructure.

The Company operates in one operating segment, which is also the Company’s one reportable segment and reporting unit.

Operations

Dredging generally involves the enhancement or preservation of the navigability of waterways or the protection of shorelines through the removal or replenishment of soil, sand or rock. Domestically, our work generally is performed in coastal waterways and deep water ports. The U.S. dredging market consists of four primary types of work: capital, coastal protection, maintenance and rivers & lakes. The Company’s “bid market” is defined as the aggregate dollar value of domestic dredging projects on which the Company bid or could have bid if not for capacity constraints or other considerations. The Company experienced an average combined bid market share in the U.S. of 33% over the three year period ended December 31, 2023, including 36%, 56%, 23% and 22% of the domestic capital, coastal protection, maintenance and rivers & lakes sectors, respectively, exclusive of liquefied natural gas (“LNG”) projects.

Over its 133 year history, the Company has grown to be a leader in capital, coastal protection and maintenance dredging in the United States and is one of the oldest and most experienced dredging companies in the country. The Company’s foreign projects are typically categorized in the capital work type, but are not included in the aforementioned bid market.

Domestic Capital (32% of 2023 revenues). Capital dredging consists primarily of port expansion projects, which involve the deepening of channels and berthing basins to allow access by larger, deeper draft ships and the provision of land fill used to expand port facilities. In addition to port work, capital projects also include coastal restoration and land reclamations, trench digging for pipelines, tunnels and cables, and other dredging related to the construction of breakwaters, jetties, canals and other marine structures. Although capital work can be impacted by budgetary constraints and economic conditions, these projects typically generate an immediate economic benefit to the ports and surrounding communities.

Coastal protection (33% of 2023 revenues). Coastal protection projects generally involve moving sand from the ocean floor to shoreline locations where erosion threatens shoreline assets. Beach erosion is a continuous problem that has intensified with the rise in coastal development and has become an important issue for state and local governments concerned with protecting beachfront tourism and real estate. Coastal protection via beach nourishment is often viewed as a better response to erosion than trapping sand through the use of sea walls and jetties, or relocating buildings and other assets away from the shoreline. Generally, coastal protection projects take place during the fall and winter months to minimize interference with bird and marine life migration and breeding patterns as well as coastal recreation activities.

Maintenance (32% of 2023 revenues). Maintenance dredging consists of the re-dredging of previously deepened waterways and harbors to remove silt, sand and other accumulated sediments. Due to natural sedimentation, most channels generally require maintenance dredging every one to three years, thus creating a recurring source of dredging work that is typically non-deferrable if optimal commercial navigability is to be maintained. In addition, severe weather such as hurricanes, flooding and droughts can also cause the accumulation of sediments and drive the need for maintenance dredging.

Rivers & lakes (3% of 2023 revenues). Domestic rivers and lakes dredging and related operations typically consist of lake and river dredging, inland levee and construction dredging, environmental restoration and habitat improvement and other marine

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construction projects. Although the Mississippi River has a large source of projects on which the Company bids, certain dredges used on these projects are more portable and able to be transported to take advantage of the fragmented market. Generally, inland river and lake projects in the northern U.S. take place in non-winter months because frozen waterways significantly reduce contractors’ ability to operate and transport its equipment in the relevant geographies.

Foreign. Foreign capital projects typically involve land reclamations, channel deepening and port infrastructure development. The Company targets foreign opportunities that are well suited to the Company’s equipment and where it faces reduced competition from its European competitors. Historically maintaining a presence in foreign markets has enabled the Company to diversify its customer base and take advantage of differences in global economic development. Over the last two decades, the Company has performed dredging work in the Middle East, Africa, Australia, the Caribbean and Central and South America. No foreign revenues were recognized during 2023. However, the Company expects to continue targeting foreign capital projects in the future.

Offshore Wind Market

While the Company continues to reinvest in our core dredging business and renew our dredging fleet, we are strategically entering the nascent U.S. offshore wind market. Entering the U.S. offshore wind market offers us the opportunity to diversify our client base, enter a different market and grow our bottom line, while also enhancing the Company’s efforts towards sustainability and renewable energy.

The Company has already established a first mover advantage in scour protection installation for offshore wind foundations, cables, and offshore substations. We are building the first Jones Act compliant rock installation vessel in the U.S. and, in 2022, won the first rock installation contract for the Empire Wind I wind farm. In December 2023, Great Lakes was awarded another rock installation contract to perform subsea rock cable protection, a new utilization for this vessel, on an offshore wind project off the East Coast of the United States.

We expect to continue to build our offshore wind capabilities, win rock installation projects and position for growth in the accelerating U.S. offshore wind market, as many of our European competitors have done in the international offshore wind markets.

Dredging Demand Drivers

The Company believes that the following factors are important drivers of the demand for its services:

•Deep port capital projects. Since the Panama Canal Expansion project, the market for dredging has expanded as most of the East Coast and Gulf ports have deepening and widening projects that are required to better meet the needs of maritime trade and enhance the capabilities to compete for international trade. In addition, shipping line manufacturers continue to deploy larger and deeper ships which require greater channel depths for travel. Many U.S. ports are constrained due to the channel dimension requirements that are needed to accommodate these vessels. The Company has worked on several port deepenings along the East and Gulf coasts over the past years, starting with Miami in 2015 and continuing through today, including our current projects in Houston and Corpus Christi. In December 2022, the Omnibus Appropriations Bill for the fiscal year 2023 was passed which included a record budget of $8.66 billion for the U.S. Army Corps of Engineers (the “Corps”). These appropriations funded the continuation of port deepening bids in 2023 for the ports of Sabine, Freeport, Mobile, San Juan, Houston, Corpus Christi and additional phases of Norfolk. Also, at the end of 2022, the Water Resources Development Act (“WRDA”) of 2022 (“WRDA 2022”), was approved by Congress and signed into law by the President. WRDA 2022 is on a two-year renewal cycle and includes legislation that authorizes the financing of Corps’ projects for flood and hurricane protection, dredging, ecosystem restoration and other construction projects. WRDA 2022 featured among many other things authorization for New York and New Jersey shipping channels to be deepened to 55 feet, projects which are estimated to be approximately $6 billion. The Company views this legislation as a positive catalyst for the domestic dredging industry as it authorizes funding for critical infrastructure improvements that are needed throughout the U.S. Further, the WRDA 2022 bill authorizes studies for future water resources improvements and make modifications to previous authorizations. Port deepening projects are essential to maintaining safe and efficient navigation channels in ports and harbors along our coastlines. The Company believes that port deepening and expansion work authorized under current and anticipated future legislation will continue to provide significant opportunities for the domestic dredging industry. The annual bid market for domestic capital dredging, which includes deep port capital dredging and Gulf Coast restoration, averaged $715 million over the three year period ended December 31, 2023.

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•Substantial need for coastal protection. Beach erosion is a recurring problem due to the normal ebb and flow of coastlines as well as the effects of severe storm activity. Growing populations in coastal communities and vital beach tourism are drawing attention to the importance of protecting beachfront assets. Over the past few years, both the federal government and state and local entities have funded beach work recognizing the essential role these natural barriers play in absorbing storm energy and protecting public and private property. As a result of the extreme storm systems in prior years involving Hurricanes Harvey, Irma, and Maria, Congress passed supplemental appropriations for disaster relief and recovery which includes $17.4 billion for the Corps to fund projects that will reduce the risk of future damage from flood and storm events. The Corps is beginning to provide visibility on its plans for this money, and it is expected that approximately $1.8 billion will be allocated to dredging-related work. Most of this work is anticipated to be coastal protection related, but some funding may be provided for channel maintenance. In addition, the Disaster Relief Supplemental Appropriations Act for fiscal year 2023 was approved which included $1.48 billion for the Corps to make necessary repairs to infrastructure impacted by hurricanes and other natural disasters and to initiate coastal protection projects that will increase coastal resiliency. This increased budget and additional funding resulted in a strong bid market in 2023. The annual bid market for coastal protection over the three year period ended December 31, 2023 averaged $367 million.

•Required maintenance of U.S. ports. The channels and waterways leading to U.S. ports have stated depths on which shippers rely when entering those ports. Due to naturally occurring sedimentation and severe weather, active channels require maintenance dredging to ensure that stated depths are at authorized levels. Consequently, the need to maintain channel depth creates a recurring source of dredging work that is non-deferrable if optimal navigability is to be preserved. The Corps is responsible for federally funded projects related to navigation and flood control of U.S. waterways. The maritime industry, including the ports, has repeatedly advocated for congressional efforts to ensure that a fully funded, recurring maintenance program is in place. Additionally, on March 27, 2020, the U.S. government enacted the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”) which includes a provision that lifts caps on the Harbor Maintenance Trust Fund (“HMTF”), thereby allowing full access to future annual revenues. The Omnibus Appropriations Bill for fiscal year 2023 includes a budget of $2.32 billion for the Harbor Maintenance Trust Fund to maintain and modernize our nation’s waterways, an increase of $269 million above the fiscal year 2022 level. Through the increased appropriation of HMTF monies, the Company has seen increased funding for harbor maintenance projects to be let for bid throughout 2023 and expects this trend to continue in 2024. Corps projects involving deepening, maintenance and coastal dredging are in line for robust funding continuing the trend of recent years. The annual bid market for maintenance dredging over the three year period ended December 31, 2023 averaged $797 million.

•Gulf coast restoration. There has been continued focus on restoring the barrier islands and wetlands that provide natural protection from storms in the Gulf Coast area. Many restoration projects have commenced to repair coastal areas. Several additional projects are being planned by state and local governments to restore natural barriers. The State of Louisiana has proposed an update to its master plan calling for a $50 billion investment in its coastal infrastructure. By law, the Louisiana Coastal Protection and Restoration Authority (“CPRA”) must update its coastal master plan every six years and let the latest science guide each iteration. The 2023 plan marks the fourth released by the agency since it formed in 2005 following Hurricane Katrina. The 2023 plan contains 73 proposed projects aimed to lower the threat of storm surge and maintain as much of a natural buffer between communities and the Gulf of Mexico as possible. Most of those specific projects are for coastal restoration, such as dredging sediment from water bottoms and pumping it elsewhere to create marsh, ridges or other natural features that provide habitat and storm protection. A handful of the projects involve diverting Mississippi River water into nearby bays to reconnect to a natural source of fresh water and sediment. Coastal restoration accounts for half the cost of the plan’s $50 billion aspirations. Many of the Gulf States, including Louisiana, have previously committed to spending a portion of the nearly $20 billion in fines received from the 2015 BP settlement of the Deepwater Horizon oil spill to repair the natural resources impacted by the event including coastal restoration projects that include dredging.

•Renewable energy projects. The growth in demand for transportation of energy worldwide has driven the need for dredging to support new terminals, harbors, channels and pipelines. Europe is currently re-evaluating their sourcing of energy after the Russian invasion of Ukraine which will require imports of large quantities of LNG. In turn, several LNG, petrochemical and crude oil projects are creating the need for port development in support of energy exports. Several North American LNG export projects have been delayed over the past couple of years since the pandemic. However, with the increase in LNG prices and sustained worldwide demand, LNG projects are expected to grow over the next several years. Additionally, as the offshore wind market develops in the U.S., port facilities will need to meet specific requirements to be able to service this industry. We anticipate these ports will require investments for port improvements that will include some dredging in order to serve as marshaling ports for various offshore wind projects. The Company continues to expect that future global energy demand will necessitate improvements in the renewable energy infrastructure base and around sources of rich resources and in countries that import or export global energy.

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For additional details regarding Operations, including financial information regarding our international and U.S. revenues and long-lived assets, see Item 7. “Management's Discussion and Analysis of Financial Condition and Results of Operations,” and Item 8. “Financial Statements and Supplementary Data” in this Annual Report on Form 10-K.

Customers

The dredging industry’s customers include federal, state and local governments, foreign governments and both domestic and foreign private concerns, such as utilities and oil and gas and other energy companies. Most dredging projects are competitively bid, with the award going to the lowest qualified bidder. Customers generally have few economical alternatives to dredging services. The Corps is the largest dredging customer in the U.S. and has responsibility for federally funded projects related to navigation and flood control. In addition, the U.S. Coast Guard and the U.S. Navy are responsible for awarding federal contracts with respect to their own facilities. In 2023, approximately 75% of the Company’s dredging revenues were generated from 39 different contracts with federal agencies or third parties operating under contracts with federal agencies.

Bidding Process

Most of the Company’s contracts are obtained through competitive bidding on terms specified by the party inviting the bid. The types of equipment required to perform the specified service, project site conditions, the estimated project duration, seasonality, location and complexity of a project affect the cost of performing the contract and the price that dredging contractors will bid.

For contracts under its jurisdiction, the Corps typically prepares a fair and reasonable cost estimate based on the specifications of the project. To be successful, a bidder must be determined by the Corps to be a responsible bidder (i.e., a bidder that generally has the necessary equipment and experience to successfully complete the project as well as the ability to obtain a surety bid bond) and submit the lowest responsive bid that does not exceed 125% of the Corps’ original estimate. Contracts for state and local governments are generally awarded to the lowest qualified bidder. Contracts for private customers are awarded based on, among other things, the contractor’s experience, equipment and schedule, contractual terms, as well as price. While substantially all of the Company’s contracts are competitively bid, some government contracts are awarded through a sole source procurement process involving negotiation between the contractor and the government, while other projects are bid by the Corps through a “request for proposal” process. The request for proposal process benefits both Great Lakes and its customers as customers can award contracts based on factors beyond price, including experience, skill and specialized equipment.

Bonding and Project Guarantees

For most domestic projects and some foreign projects, dredging service providers are required to obtain three types of bonds: bid bonds, performance bonds and payment bonds. These bonds are typically provided by large insurance companies. A bid bond is required to serve as a guarantee so that if a service provider’s bid is chosen, the service provider will sign the contract. The amount of the bond is typically 20% of the service provider’s bid, with a range generally between $1 and $10 million. After a contract is signed, the bid bond is replaced by a performance bond, the purpose of which is to guarantee that the job will be completed. If the service provider fails to complete a job, the bonding company would be required to complete the job and would be entitled to be paid the contract price directly by the customer. Additionally, the bonding company would be entitled to be paid by the service provider for any costs incurred in excess of the contract price. A service provider’s ability to obtain performance bonds with respect to a particular contract depends upon the size of the contract, as well as the size of the service provider and its financial position. A payment bond is required to protect the service provider’s suppliers and subcontractors in the event that the service provider cannot make timely payments. Payment bonds are generally written at 100% of the contract value.

The Company has bonding agreements with Argonaut Insurance Company, ACE Holdings, Liberty Mutual Insurance Company and Philadelphia Indemnity Insurance Company, (collectively, the “Sureties”) under which the Company can obtain performance, bid and payment bonds. The Company also currently has outstanding bonds with Travelers Casualty and Surety Company of America, Berkley Insurance Company and Zurich American Insurance Company. Great Lakes has never experienced difficulty in obtaining bonding for any of its projects and Great Lakes has never failed to complete a marine project in its 133 year history.

For certain projects, including foreign, private, and offshore wind projects, letters of credit or bank guarantees are required as security for the performance and, if applicable, bid or advance payment guarantees. The Company obtains its letters of credit under the Amended Credit Agreement (as defined below). Bid guarantees are usually 2% to 5% of the service provider’s bid. Performance and advance payment guarantees are each typically 5% to 20% of the contract value.

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Competition

The U.S. dredging industry is highly fragmented, composed of many small operators, primarily in maintenance dredging. Most of these dredges are smaller and service the inland, as opposed to coastal, waterways, and therefore do not generally compete with Great Lakes except in our rivers & lakes market. Competition is determined by the size and complexity of the job, equipment bonding and certification requirements and government regulations. Competition on rivers & lakes projects is determined primarily based on geographic reach, project execution capability and price. Great Lakes and three other companies comprised approximately 66% of the Company’s defined bid market related to domestic capital, coastal protection, maintenance and rivers & lakes over the three year period ended December 31, 2023. Within the Company’s bid market, competition is determined primarily on the basis of price. In addition, the Foreign Dredge Act of 1906 (the “Dredging Act”) and Section 27 of the Merchant Marine Act of 1920 (the “Jones Act”) provide significant barriers to entry with respect to foreign competition. Together these two laws prohibit foreign-built, chartered or operated vessels from competing in the U.S. See “Business—Government Regulations” below.

Competition in the international market is dominated by four large European dredging companies all of which operate larger equipment and fleets that are more extensive than the Company’s fleet. Additionally, a large Chinese dredging company controls most of its local market and is a key player in the international market. There are also several governmentally supported dredging companies that operate on a local or regional basis. The Company targets opportunities that are well suited to its equipment and where it can be most competitive.

Equipment

Great Lakes’ fleet of dredges, material barges and other specialized equipment is the largest and most diverse in the U.S. The Company operates three principal types of dredging equipment: hopper dredges, hydraulic dredges and mechanical dredges.

Hopper Dredges. Hopper dredges are typically self-propelled and have the general appearance of an ocean-going vessel. The dredge has hollow hulls, or “hoppers,” into which material is suctioned hydraulically through drag-arms. Once the hoppers are filled, the dredge sails to the designated disposal site and either (i) bottom dumps the material or (ii) pumps the material from the hoppers through a pipeline to a designated site. Hopper dredges can operate in rough waters, are less likely than other types of dredges to interfere with ship traffic, and can be relocated quickly from one project to another. Hopper dredges primarily work on coastal protection and maintenance projects. The Company has recently taken delivery of a 6,500 cubic yard trailing suction hopper dredge, the Galveston Island, which began operations in February 2024. Additionally, in June 2022 the Company exercised the contract option with the same builder to build a second 6,500 cubic yard trailing suction hopper dredge, the Amelia Island, with expected delivery in 2025. The addition of the new Galveston Island and Amelia Island hopper dredges will provide the Company with added capacity and the opportunity to potentially retire older dredges.

Hydraulic Dredges. Hydraulic dredges remove material using a revolving cutterhead which cuts and churns the sediment on the channel or ocean floor and hydraulically pumps the material by pipe to the disposal location. These dredges are very powerful and can dredge some types of rock. Certain dredged materials can be directly pumped for miles with the aid of multiple booster pumps. Hydraulic dredges work with an assortment of support equipment, which help with the positioning and movement of the dredge, handling of the pipelines and the placement of the dredged material. Unlike hopper dredges, relocating hydraulic dredges and all their ancillary equipment requires specialized vessels and additional time, and their operations can be impacted by ship traffic and rough waters. There is a wide range of hydraulic dredges from our smaller rivers & lakes vessels that use pipe sizes ranging from 10” to 22” and operate at between 365 and 3,200 total horsepower, while the Company’s other hydraulic dredges use pipe sizes ranging from 18” to 30” and operate at between 1,900 and 16,650 total horsepower.

Mechanical Dredges. There are two basic types of mechanical dredges: clamshell and backhoe. In both types, the dredge uses a bucket to excavate material from the channel or ocean floor. The dredged material is placed by the bucket into material barges, or “scows,” for transport to the designated disposal area. The scows are emptied by bottom-dumping, direct pump-out or removal by a crane with a bucket. The backhoe dredge is capable of removing hard-packed sediments, blasted rock and debris and can work in tight areas such as along docks or terminals. Clamshell dredges with specialized buckets are ideally suited to handle softer silts and maintenance material requiring environmentally controlled excavation and disposal. Additionally, the Company owns an electric clamshell dredge which provides an advantage in those markets with stringent emissions standards. During 2023, the Company retired one mechanical dredge as part of its ongoing fleet modernization program.

Scows. The Company has the largest fleet of material barges in the domestic industry, which provides cost advantages when dredged material is required to be disposed far offshore or when material requires controlled disposal. The Company uses scows with its hydraulic dredges and mechanical dredges. Scows are an efficient and cost-effective way to move material and increase dredging production. The Company has thirteen scows in its fleet with a capacity ranging from 5,000 to 8,800 cubic yards. The Company placed into service three new scows during 2022, each 8,800 cubic yards in size. During 2023, the Company entered into a sale

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leaseback transaction for the three scows placed into service in 2022. The transaction generated gross cash proceeds of $29.5 million. Additionally in 2023, the Company retired three scows as part of its ongoing fleet modernization program.

Multi Cats. In 2023, the Company took delivery of two Damen multifunctional all-purpose vessels (“Multi Cats”), the Cape Hatteras and the Cape Canaveral in 2023. These vessels will greatly improve the safety and efficiency of pipe and anchor operations. The two vessels are the first Damen Multi Cats to be built in the U.S. and are fully compliant with the U.S. Coast Guard and U.S. Army Corps of Engineers stability criteria.

The Company has numerous pieces of smaller equipment that support its dredging operations. Great Lakes’ domestic dredging fleet is typically positioned on the East and Gulf Coasts, with many of the rivers & lakes dredges on inland rivers and lakes. The mobility of the fleet enables the Company to move equipment in response to changes in demand.

The Company continually assesses its need to upgrade and expand its dredging fleet to take advantage of improving technology and to address the changing needs of the dredging market, and retire older, less efficient dredges.

The Company is also committed to a reliability-assured maintenance program, which it believes is reflected in the long lives of most if its equipment and its low level of unscheduled downtime on jobs. To the extent that market conditions warrant the expenditures, Great Lakes can prolong the useful life of its vessels.

Certification of equipment by the U.S. Coast Guard and establishment of the permissible loading capacity by the American Bureau of Shipping (“A.B.S.”) are important factors in the Company’s dredging business. Many projects, such as coastal protection projects with offshore sand borrow sites and dredging projects in exposed entrance channels or with offshore disposal areas, are restricted by federal regulations to be performed only by dredges or scows that have U.S. Coast Guard certification and a load line established by A.B.S. The certifications indicate that the dredge is structurally capable of operating in open waters. The Company has more certified dredging vessels than any of the Company’s domestic competitors and makes substantial investments to maintain these certifications.

Seasonality

Seasonality generally does have a significant impact on the Company’s operations. However, many East Coast coastal protection projects are limited by environmental windows that require work to be performed in winter months to protect wildlife habitats. The Company can mitigate the impact of these environmental restrictions to a certain extent because the Company has the flexibility to reposition its equipment to project sites, if available, that are not limited by these restrictions. In addition, rivers and lakes in the northern U.S. freeze during the winter, significantly reducing the Company’s ability to operate and transport its equipment in the relevant geographies. Fish spawning and flooding can affect dredging operations as well.

Weather

The Company’s ability to perform its contracts may depend on weather conditions. Inclement or hazardous weather conditions can delay the completion of a project, can result in disruption or early termination of a project, unanticipated recovery costs or liability exposure and additional costs. As part of bidding on fixed-price contracts, the Company makes allowances, consistent with historical weather data, for project downtime due to adverse weather conditions. In the event that the Company experiences adverse weather beyond these allowances, a project may require additional days to complete, resulting in additional costs and decreased gross profit margins. Conversely, favorable weather can accelerate the completion of the project, resulting in cost savings and increased gross profit margins. Typically, Great Lakes is exposed to significant weather in the first and fourth quarters, and certain projects are required to be performed in environmental windows that occur during these periods. See “Business-Seasonality” above.

Weather is difficult to predict and historical records exist for only the last 100-125 years. Changes in weather patterns may cause a deviation from project weather allowances on a more frequent basis and consequently increase or decrease gross profit margin, as applicable, on a project-by-project basis. In a typical year, the Company works on many projects in multiple geographic locations and experiences both positive and negative deviations from project weather allowances. Recent years have seen a marked change in weather patterns, particularly in the Northeastern U.S., which has adversely impacted our projects.

Backlog

The Company’s contract backlog represents its estimate of the revenues that will be realized under the portion of the contracts remaining to be performed. These estimates are based primarily upon the time and costs required to mobilize the necessary assets to and from the project site, the amount and type of material to be dredged and the expected production capabilities of the equipment performing the work. However, these estimates are necessarily subject to variances based upon actual circumstances. Because of these factors, as well as factors affecting the time required to complete each job, backlog is not always indicative of future revenues or profitability. In addition, a significant amount of the Company’s backlog relates to federal government contracts, which can be canceled at any time without penalty, subject to the Company’s right, in some cases, to recover the Company’s actual committed costs

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and profit on work performed up to the date of cancellation. The Company’s backlog may fluctuate significantly from quarter to quarter based upon the type and size of the projects the Company is awarded from the bid market. A quarterly increase or decrease of the Company’s backlog does not necessarily result in an improvement or a deterioration of the Company’s business. The Company’s backlog includes only those projects for which the Company has obtained a signed contract with the customer. The components of the Company’s backlog including dollar amount and other related information are addressed in more detail in Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Bidding Activity and Backlog.”

Human Capital Management

At December 31, 2023, the Company employed 364 full-time salaried and non-exempt personnel in the U.S., including those in a corporate function. In addition, the Company employs U.S. hourly personnel, most of whom are unionized, on a project-by-project basis. Crews are generally available for hire on relatively short notice. During 2023, the Company employed an average of approximately 596 hourly personnel to meet domestic project requirements.

The U.S. salary and non-exempt full-time employees are composed of approximately 90% men and 10% women. The Company's employees are based across the U.S. with several project locations on the coasts and office locations in Houston, Texas, Oakbrook Terrace, Illinois, Staten Island, New York and Jacksonville, Florida. Based on self-reporting, employee demographics are composed of approximately 65% White, 18% Hispanic or Latino, 12% African American or Black, 3% Asian, less than 1% American Indian or Alaska Native and less than 1% Native Hawaiian or Other Pacific Islander.

At December 31, 2023, the Company employed 2 foreign nationals and 1 local staff to manage and administer its Middle East operations.

The Company seeks to attract, select, hire, retain, incentivize, and integrate our existing and future employees. To achieve our goal of attracting and retaining the most talented employees in the industry, we offer a respectful and safe work environment with competitive compensation and benefits that support employees physical, financial, and emotional health. The principal objective of our equity incentive plans is to attract, retain and motivate executives and selected employees through the granting of stock-based compensation awards. We offer employees benefits including a 401(k) plan with employer contributions; health, life, and disability insurance; additional voluntary insurance; paid time off, parental leave; and paid employee assistance programs.

Safety

Safety is a core value at GLDD, and our Incident & Injury Free® (IIF®) safety approach management program is integrated into all aspects of our culture. The Company’s safety culture is committed to training, behavioral based awareness and mutual responsibility for the wellbeing of its employees. The Company’s goal is sustainable safety excellence. Incident prevention in all areas has top priority in the Company’s business planning, in the overall conduct of its business, and in the operation and maintenance of our equipment (marine and land) and facilities.

Unions

The Company is a party to numerous collective bargaining agreements in the U.S. that govern its relationships with its unionized hourly workforce. However, two unions represent a large majority of our dredging employees - the International Union of Operating Engineers (“IUOE”) Local 25 and the Seafarers International Union. The Company’s master and ancillary contracts with IUOE Local 25 will expire on September 30, 2024 and negotiations will begin in the second quarter of 2024 for a renewal agreement. Our agreements with the Seafarers International Union expire in February 2026. The Company has not experienced any major labor disputes in the past five years and believes it has good relationships with the unions that represent a significant number of its hourly employees; however, there can be no assurances that the Company will not experience labor strikes or disturbances in the future.

Government Regulations

The Company is subject to government regulations pursuant to the Dredging Act, the Jones Act, the Shipping Act, 1916 (the “Shipping Act”) and the vessel documentation laws set forth in Chapter 121 of Title 46 of the United States Code. These statutes require vessels engaged in dredging in the navigable waters of the United States to be documented with a coastwise endorsement, and, among other things, to be owned and controlled by U.S. citizens, to be manned by U.S. crews, and to be built in the United States. The U.S. citizen ownership and control standards require the vessel-owning entity to be at least 75% U.S. citizen owned and prohibit the chartering of the vessel to any entity that does not meet the 75% U.S. citizen ownership test.

Environmental Matters

The Company’s operations, facilities and vessels are subject to various environmental laws and regulations related to, among other things: dredging operations; the disposal of dredged material; protection of wetlands; storm water and waste water discharges; and air emissions. The Company is also subject to laws designed to protect certain marine species and habitats. Compliance with these statutes and regulations can delay appropriation and/or performance of particular projects and increase related project costs.

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Non-compliance can also result in fines, penalties and claims by third parties seeking damages for alleged personal injury, as well as damages to property and natural resources.

Certain environmental laws such as the U.S. Comprehensive Environmental Response, Compensation and Liability Act of 1980, the Clean Water Act and the Oil Pollution Act of 1990 impose strict and, under some circumstances joint and several, liability on owners and operators of facilities and vessels for investigation and remediation of releases and discharges of regulated materials, and also impose liability for related damages to natural resources. The Company’s past and ongoing operations involve the use, and from time to time the release or discharge, of regulated materials which could result in liability under these and other environmental laws. The Company has remediated known releases and discharges as deemed necessary, but there can be no guarantee that additional costs will not be incurred if, for example, third party claims arise or new conditions are discovered.

The Company’s projects may involve remediation, demolition, excavation, transportation, management and disposal of hazardous waste and other regulated materials. Various laws strictly regulate the removal, treatment and transportation of hazardous water and other regulated materials and impose liability for human health effects and environmental contamination caused by these materials. The Company takes steps to limit its potential liability by hiring qualified subcontractors from time to time to remove such materials from our projects, and some project contracts require the client to retain liability for hazardous waste generation.

Based on the Company’s experience and available information, the Company believes that the future cost of compliance with existing environmental laws and regulations (and liability for known environmental conditions) will not have a material adverse effect on the Company’s business, financial position, results of operations or cash flows. However, the Company cannot predict what environmental legislation or regulations will be enacted in the future, how existing or future laws or regulations will be enforced, administered or interpreted, or the amount of future expenditures that may be required to comply with these environmental or health and safety laws or regulations or to respond to newly discovered conditions, such as future cleanup matters or other environmental claims.

Information about our Executive Officers

The following table sets forth the names and ages of all of the Company’s executive officers and the positions and offices presently held by them.

Name	Age	Position
Lasse J. Petterson	67	President, Chief Executive Officer and Director
Scott Kornblau	52	Senior Vice President, Chief Financial Officer & Treasurer
David Johanson	52	Senior Vice President, Project Acquisition & Operations
Christopher G. Gunsten	54	Senior Vice President, Project Services & Fleet Engineering
Eleni Beyko	58	Senior Vice President, Offshore Wind
Vivienne R. Schiffer	64	Senior Vice President, Chief Legal Officer & Chief Compliance Officer
William H. Hanson	67	Senior Vice President, Market Development

Lasse J. Petterson, President, Chief Executive Officer and Director

Mr. Petterson has served as Chief Executive Officer (“CEO”) since May 2017 and was also named President in 2020. Mr. Petterson most recently had served as a private consultant to clients in the Oil & Gas sector and served as Chief Operating Officer (“COO”) and Executive Vice President at Chicago Bridge and Iron (“CB&I”) from 2009 to 2013. Reporting directly to the CEO, he was responsible for all of CB&I’s engineering, procurement and construction project operations and sales. Prior to CB&I, Mr. Petterson was CEO of Gearbulk, Ltd., a privately held company that owns and operates one of the largest fleets of gantry craned open hatch bulk vessels in the world. He was also President and COO of AMEC Inc. Americas, a subsidiary of AMEC plc, a British multinational consulting, engineering and project management company. Prior to joining AMEC, Mr. Petterson served in various executive and operational positions for Aker Maritime, Inc., the deepwater division of Aker Maritime ASA of Norway over the course of 20 years. He spent the first nine years of his career in various positions at Norwegian Contractors, an offshore oil & gas platform contractor. Mr. Petterson holds both master’s and bachelor’s degrees from the Norwegian University of Technology.

Scott Kornblau, Senior Vice President, Chief Financial Officer and Treasurer

Mr. Kornblau was named Senior Vice President and Chief Financial Officer (“CFO”) when he joined the Company in October 2021 and was additionally named Treasurer in January 2022. In his over 25 years of professional experience prior, Mr. Kornblau has held various finance and leadership positions at Diamond Offshore Drilling, Inc. (“Diamond”), most recently as Senior Vice President and Chief Financial Officer since July 2018. Prior to Mr. Kornblau’s appointment as CFO, he held the roles of acting CFO since

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December 2017 in addition to his Vice President and Treasurer position at Diamond since January 2017. Mr. Kornblau earned a Bachelor of Arts degree in Accounting from the University of Texas at Austin. Mr. Kornblau is a certified public accountant.

David Johanson, Senior Vice President, Project Acquisition and Operations

Mr. Johanson was named Senior Vice President, Project Acquisition & Operation in July 2022 after serving as Senior Vice President, Gulf Region. Before that, Mr. Johanson was promoted to Vice President and Hydraulic Division Manager in 2015 and served as Vice President Project Director of Charleston Deepening Projects from 2018-2020, which included the largest dredging contract ever awarded by the U.S. Army Corps of Engineers. He joined the Company in 1994 as a field engineer and has held positions of increasing responsibility in project management. Mr. Johanson earned a Bachelor of Science degree in Ocean Engineering from the Virginia Polytechnic Institute & State University and a MBA with a finance specialization from the University of South Carolina. He is a current board member of the Western Dredging Association Eastern Branch and is a member of American Society of Civil Engineers.

Christopher G. Gunsten, Senior Vice President, Project Services and Fleet Engineering

Mr. Gunsten was appointed to the position of Senior Vice President, Project Services & Fleet Engineering in July 2022 after serving as Senior Vice President, Project Services. Previously he served as Vice President, International Operations with responsibility for acquiring projects, providing estimation data and leading field supervision of work in progress. Mr. Gunsten began his career with the Company as a field engineer in 1992. His career highlights include serving as Deputy Project Manager for Chevron’s Wheatstone LNG Project’s Engineering, Procure and Construct dredging subcontract in Onslow, WA, Australia valued at $1.2 billion AUD, as Project Manager executing a series of capital projects for the USACE New York District’s 45 and 50 Foot Harbor Deepening Programs and as Operations Manager for the Company's Øresund Fixed Link Project in Copenhagen, Denmark. He received his Bachelor of Science degree in Civil Engineering from Rutgers University and his MBA from Loyola University Chicago.

Eleni Beyko, Senior Vice President, Offshore Wind

Ms. Beyko joined Great Lakes in January 2021 as Senior Vice President, Offshore Wind, and is responsible for Offshore Wind strategy and business development, as well as leading the Company's Offshore Wind Operations. Ms. Beyko has over 20 years’ experience in program engineering, business leadership, and project execution for the automobile and offshore oil and gas markets. Her experience has also included Engineering, Technical Manager, Research & Development – Offshore Technology, and offshore projects. She most recently served as Director, Energy Transition for Americas at TechnipFMC. At TechnipFMC, she was responsible for positioning TechnipFMC to support the transition into new and economically viable wind energy resources, and managing the Makani wind-borne energy spar offshore platform installation in partnership with Shell and Google X. Ms. Beyko graduated with a Diploma from National Technical University Athens in Mechanical Engineering, Naval Architecture & Marine Engineering. She attended the University of Michigan where she earned her MSE, Naval Architecture and Marine Engineering, MSE Applied Mechanics, Mechanical Engineering, Master of Business Administration (MBA) and Ph.D., Naval Architecture and Marine Engineering.

Vivienne R. Schiffer, Senior Vice President, Chief Legal Officer and Chief Compliance Officer

Ms. Schiffer was named Senior Vice President, Chief Legal Officer, Chief Compliance Officer and Corporate Secretary in December 2020 when she joined the Company. Ms. Schiffer leads the Company's legal, compliance and human resource organizations, providing legal counsel. Ms. Schiffer’s specific responsibilities include the oversight of corporate governance, policy and regulatory strategy development, litigation, environmental matters, intellectual property, global corporate compliance and labor and employment laws. Ms. Schiffer was a corporate and securities partner in the global firm of Thompson & Knight, LLP, now Holland & Knight, LLP, from 2003 to 2010. She was of counsel in the firm’s corporate and securities section from 2011 until 2020. She has over 40 years of experience and has held significant legal, business and operational leadership roles in the industrials sector. Ms. Schiffer earned a Bachelor of Science degree from the University of Central Arkansas and a Juris Doctor degree from Tulane University. A member of the Asian American Journalists Association, Ms. Schiffer holds a certification in sustainability from Stanford University Graduate School of Business and a certification in Cybersecurity Governance for the Board of Directors from the Massachusetts Institute of Technology Sloan School of Management.

William H. Hanson, Senior Vice President, Market Development

Mr. Hanson was named the Senior Vice President, Market Development in January 2023 after serving as Senior Vice President - Government Relations & Business Development, a position he had held since March 2020. He was named Vice President of the Company in 2004. Mr. Hanson worked for Connolly Pacific of Long Beach, California before joining GLDD in 1988. Prior to his work at Connolly Pacific, Mr. Hanson was with the U.S. Army Corps of Engineers. Mr. Hanson serves on several Federal Advisory

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Committees as well as on boards of groups with national and regional interest to the Company and several academic advisory boards related to ocean and coastal engineering. Mr. Hanson is an Ocean Engineering graduate of Texas A&M University where he was named a distinguished alumnus in 2013.

Availability of Information

You may read and obtain copies of any materials Great Lakes files with the SEC, including without limitation, the Company’s Annual Report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, free of charge, at the SEC’s website, www.sec.gov. Great Lakes’ SEC filings are also available to the public, free of charge, on our corporate website, www.gldd.com, at “Investors – Financials & Filings”, as soon as reasonably practicable after Great Lakes electronically files such material with, or furnishes it to, the SEC. The reference to the Company’s website does not constitute incorporation by reference of information contained on or accessible through such website.

Item 1A. Risk Factors.

The following risk factors address the material risks and uncertainties concerning our business. You should carefully consider the following risks and other information contained or incorporated by reference into this Annual Report on Form 10-K when evaluating our business and financial condition and an investment in our common stock. Should any of the following risks or uncertainties develop into actual events, such developments could have material adverse effects on our business, financial condition, cash flows or results of operations. Risks not currently known to the Company or that the Company currently deems to be immaterial may also materially and adversely affect the Company's business, operating results, financial condition and the actual outcome of matters as to which forward-looking statements are made in this report.

We have grouped our Risk Factors under captions that we believe describe various categories of potential risk. For the reader’s convenience, we have not duplicated risk factors that could be considered to be included in more than one category.

Risk Factor Summary

The following is a summary of the principal risks that could adversely affect, or have adversely affected, the Company’s business, operating results and financial condition:

•A reduction in government funding for dredging and other contracts, or government cancellation of such contracts, or the inability of the Corps to let bids to market;

•Our ability to qualify as an eligible bidder under government contract criteria and to compete successfully against other qualified bidders in order to obtain government dredging and other contracts;

•Cost over-runs, operating cost inflation and potential claims for liquidated damages, particularly with respect to our fixed cost contracts;

•The timing of our performance on contracts and new contracts being awarded to us;

•Significant liabilities that could be imposed were we to fail to comply with government contracting regulations;

•Project delays related to the increasingly negative impacts of climate change or other unusual, non-historical weather patterns;

•Costs necessary to operate and maintain our existing vessels and the construction of new vessels;

•Equipment or mechanical failures;

•Pandemic, epidemic or outbreak of an infectious disease;

•Disruptions to our supply chain for procurement of new vessel build materials or maintenance on our existing vessels;

•Capital and operational costs due to environmental regulations;

•Market and regulatory responses to climate change, including proposed regulations concerning emissions reporting and future emissions reduction goals;

•Contract penalties for any projects that are completed late;

•Force majeure events, including natural disasters, war and terrorists’ actions;

•Changes in the amount of our estimated backlog;

•Significant negative changes attributable to large, single customer contracts;

•Our ability to obtain financing for the construction of new vessels, including our new offshore wind vessel;

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•Our ability to secure contracts to utilize our new offshore wind vessel;

•Unforeseen delays and cost overruns related to the construction of our new vessels;

•Any failure to comply with the Jones Act provisions on coastwise trade, or if those provisions were modified or repealed;

•Fluctuations in fuel prices, particularly given our dependence on petroleum-based products;

•Impacts of nationwide inflation on procurement of new build and vessel maintenance materials;

•Our ability to obtain bonding or letters of credit and risks associated with draws by the surety on outstanding bonds or calls by the beneficiary on outstanding letters of credit;

•Acquisition integration and consolidation, including transaction expenses, unexpected liabilities and operational challenges and risks;

•Divestitures and discontinued operations, including retained liabilities from businesses that we sell or discontinue;

•Potential penalties and reputational damage as a result of legal and regulatory proceedings;

•Any liabilities imposed on us for the obligations of joint ventures, partners and subcontractors;

•Increased costs of certain material used in our operations due to newly imposed tariffs;

•Unionized labor force work stoppages;

•Any liabilities for job-related claims under federal law, which does not provide for the liability limitations typically present under state law;

•Operational hazards, including any liabilities or losses relating to personal or property damage resulting from our operations;

•Our ability to identify and contract with qualified MBE or DBE contractors to perform as subcontractors;

•Our substantial amount of indebtedness, which makes us more vulnerable to adverse economic and competitive conditions;

•Restrictions on the operation of our business imposed by financing terms and covenants;

•Impacts of adverse capital and credit market conditions on our ability to meet liquidity needs and access capital;

•Limitations on our hedging strategy imposed by statutory and regulatory requirements for derivative transactions;

•Foreign exchange risks, in particular, as it relates to the new offshore wind vessel build;

•Losses attributable to our investments in privately financed projects;

•Restrictions on foreign ownership of our common stock;

•Restrictions imposed by Delaware law and our charter on takeover transactions that stockholders may consider to be favorable;

•Restrictions on our ability to declare dividends imposed by our financing agreements or Delaware law;

•Significant fluctuations in the market price of our common stock, which may make it difficult for holders to resell our common stock when they want or at prices that they find attractive;

•Changes in previously recorded net revenue and profit as a result of the significant estimates made in connection with our methods of accounting for recognized revenue;

•Maintaining an adequate level of insurance coverage;

•Our ability to find, attract and retain key personnel and skilled labor;

•Disruptions, failures, data corruptions, cyber-based attacks or security breaches of the information technology systems on which we rely to conduct our business; and

•Impairments of our goodwill or other intangible assets.

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Risks Related to our Business

A reduction in government funding for dredging or other contracts, or government cancellation of such contracts, or the inability of the Corps to let bids to market could materially adversely affect our business operations, revenues and profits.

A substantial portion of our revenue is derived from federal government contracts, particularly dredging contracts. Revenues related to dredging contracts with federal agencies or companies operating under contracts with federal agencies and the percentage as a total of dredging revenue for the years ended December 31, 2023, 2022 and 2021 were as follows:

	Year Ended December 31,
	2023			2022			2021
Federal government revenue (in US $1,000)	$	438,790		$	431,705		$	568,980
Percent of revenue from federal government		74	%		67	%		78	%

Amounts spent by the federal government on dredging are subject to the budgetary and legislative processes. We would expect the federal government to continue to improve and maintain ports as it has for many years, which will necessitate a certain level of federal spending. However, there can be no assurance that the federal government will allocate any particular amount or level of funds to be spent on dredging projects for any specified period. In addition, Congress must approve budgets that govern spending by many of the federal agencies we support. When Congress is unable to agree on budget priorities, and thus is unable to pass the annual budget on a timely basis, Congress typically enacts a continuing resolution. A continuing resolution allows U.S. federal government agencies to operate at spending levels approved in the previous budget cycle. Under a continuing resolution, funding may not be available for new projects or may be delayed on current projects. Any such funding delays would likely result in new projects being delayed or canceled and could have a material adverse effect on our revenue and operating results. Furthermore, a failure to complete the budget process and fund government operations pursuant to a continuing resolution may result in a U.S. federal government shutdown. An extended shutdown may result in us incurring substantial costs without reimbursement under our contracts and the delay or cancellation of key projects, which could have a material adverse effect on our revenue and operating results. The Company did not experience any material adverse effect on its operations in 2023 as a result of the U.S. federal government operating under a continuing resolution until December 2022. Currently, the government is operating under a continuing resolution until the 2024 budget is approved.

In addition, potential contract cancellations, modifications, protests, suspensions or terminations may arise from resolution of these issues and could cause our revenues, profits and cash flows to be lower. Federal government contracts can be canceled at any time without penalty to the government, subject to, in most cases, our contractual right to recover our actual committed costs and profit on work performed up to the date of cancellation. Accordingly, there can be no assurance that the federal government will not cancel any federal government contracts that have been or are awarded to us. Even if a contract is not cancelled, the government may elect to not award further work pursuant to a contract. There is no guarantee that the current presidential administration or Congress will not divert funds away from the Corps or from our other customers relying on funding from the federal government. There is also no guarantee that additional national emergencies will not be declared in the future. A significant reduction in government funding for dredging or remediation contracts could materially adversely affect our business, operations, revenues and profits.

Further, if the Corps is unable to let bids to market, it could adversely affect our business, operations, revenues and profits. In 2022, our business was adversely impacted by the inability of the Corps to let bids to market, and that inability may continue and may adversely impact our results of operations. If the Corps does not bring higher margin capital projects to market, it may adversely impact our results of operations.

Our inability to qualify as an eligible bidder for government contracts or to compete successfully with other qualified bidders for certain contracts could materially adversely affect our business operations, revenues and profits.

The U.S. government and various state, local and foreign government agencies conduct rigorous competitive processes for awarding many contracts. Some contracts include multiple award task order contracts in which several contractors are selected as eligible bidders for future work. We will face strong competition and pricing pressures for any additional contract awards from the U.S. government and other domestic and foreign government agencies, and we may be required to qualify or continue to qualify under various multiple award task order contract criteria. Further, much of our work depends on our compliance with environmental and other regulations. Any claim by the government that we have violated any laws or regulations could result in our suspension or debarment from bidding for or being awarded government contracts. Our inability to qualify as an eligible bidder under government contract criteria could preclude us from competing for certain government contract awards. In addition, our inability to qualify as an eligible bidder, or to compete successfully when bidding for certain government contracts and to win those contracts, could materially adversely affect our business, operations, revenues and profits.

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Our significant number of fixed-price contracts subjects us to risks associated with cost over-runs, operating cost inflation and potential claims for liquidated damages. If we are unable to accurately estimate our project costs our profitability could suffer.

We conduct our business under various types of contracts where costs are estimated in advance of our performance. Most dredging contracts are fixed-price contracts where the customer pays a fixed price per unit (e.g., cubic yard) of material dredged. Fixed-price contracts carry inherent risks, including risks of losses from underestimating costs, weather delays, operational difficulties, and other changes that can occur over the contract period. If our estimates prove inaccurate, if there are errors or ambiguities as to contract specifications, or if circumstances change due to, among other things, unanticipated conditions or technical problems, difficulties in obtaining permits or approvals, changes in local laws or labor conditions, inclement or hazardous weather conditions, changes in cost of equipment or materials, or our suppliers’ or subcontractor’s inability to perform, then cost over-runs and delays in performance are likely to occur. We may not be able to obtain compensation for additional work performed or expenses incurred, or may be delayed in receiving necessary approvals or payments. Additionally, we may be required to pay liquidated damages upon our failure to meet schedule or performance requirements of our contracts. If we were to significantly underestimate the costs on one or more significant contracts, the resulting losses could have a material adverse effect on our business, operating results, cash flows or financial condition.

Our quarterly and annual operating results may vary significantly based on the timing of contract awards and performance.

Our quarterly and annual results of operations have fluctuated from period to period in the past and may continue to fluctuate in the future. Accordingly, you should not rely on the results of any past quarter or quarters as an indication of future performance in our business operations or valuation of our stock. Our operating results could vary greatly from period to period due to factors such as:

•the timing of contract awards and the commencement or progress of work under awarded contracts;

•inclement or hazardous weather conditions, including non-historical weather patterns, particularly in the Northeastern United States, that may result in underestimated delays in dredging, disruption or early termination of projects, unanticipated recovery costs or liability exposure, and additional contract expenses;

•site conditions that differ from those presented by our customers, which results in delays or slower than anticipated progress on projects;

•planned and unplanned equipment downtime, or equipment mobilization to and from projects, including those due to the impacts of unplanned national health emergencies;

•our ability to recognize revenue from pending change orders, which is recognized only when the parties to a contract approve a modification that either creates new, or changes existing, enforceable rights and obligations of the parties to the contract; and

•environmental restrictions requiring that certain projects be performed in winter months to protect wildlife habitats.

If our results of operations from quarter to quarter fail to meet the expectations of public market analysts and investors, our stock price could be negatively impacted. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Primary Factors that Determine Operating Profitability.”

If we fail to comply with government contracting regulations, we could be subject to significant potential liabilities and loss of revenue.

Our contracts with federal, state, local and foreign governmental customers are subject to various procurement regulations and contract provisions. These regulations also subject us to examinations by government auditors and investigators, from time to time, to ensure compliance and to review costs. Violations of government contracting regulations could result in the imposition of civil and criminal penalties, which could include termination of contracts, forfeiture of profits, imposition of payments and fines and suspension or debarment from future government contracting. If we fail to continue to qualify for or are suspended from work under a government contract for any reason, we could suffer a material adverse effect on our business, operating results, cash flows or financial condition.

In addition, we may be subject to litigation brought by private individuals on behalf of the government relating to our government contracts, referred to in this annual report as “qui tam” actions, which could include claims for up to treble damages. Qui tam actions are sealed by the court at the time of filing. The only parties privy to the information in the complaint are the complainant, the U.S. government and the court. Therefore, it is possible that qui tam actions have been filed against us. Thus, it is possible that we are subject to liability exposure arising out of qui tam actions.

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Project delays related to the increasingly negative impacts of climate change or other unusual, non-historical weather patterns has and may continue to impact our ability to perform projects on time and on budget and therefore could materially adversely affect our business operations, revenues and profits.

The timely and efficient performance of our projects are dependent on weather conditions. Severe storms or other weather-related problems, which are becoming increasing variable and which deviate from expected historical weather patterns as a result of climate change or other factors, can, and have, caused substantial delays on our projects. Delays, such as those we experienced in 2022, may affect our ability to perform on our projects or increase the cost of our performing certain projects, and may result in our inability to perform certain projects on time and on budget. While we attempt to plan for all scenarios when bidding on projects, weather events caused by climate change or other unanticipated variables have made that planning increasing difficult. While we did not experience any significant delays in 2023, we expect that the severity of unusual storms and weather patterns will continue to fluctuate and may continue to adversely impact our ability to complete projects on time and on budget and therefore could materially adversely affect our business operations, revenues and profits.

Costs necessary to operate and maintain our vessels tend to increase with the age of the vessel, and costs of such maintenance, as well as costs associated with new build programs, may also increase due to changes in applicable regulations or standards, which could decrease our profits.

Capital expenditures and other costs necessary to operate and maintain our vessels tend to increase with the age of the vessel. Accordingly, it is likely that the operating costs of our vessels will increase.

The average age of our more significant vessels as of December 31, 2023, by equipment type, is as follows:

Type of Equipment	Quantity		Average Age in Years
Hydraulic Dredges		8		45
Hopper Dredges		5		23
Mechanical Dredges		4		35
Unloaders		1		40
Drillboats		1		40
Material and Other Barges		86		22
Total		105		25

Remaining economic life has not been presented, because it is not reasonably quantifiable. That is because, to the extent that market conditions warrant the expenditures, we can prolong the vessels’ lives. In our domestic market, we operate in an industry where a significant portion of our competitors’ equipment is of a similar age. It is common in the dredging industry to make maintenance and capital expenditures in order to extend the economic life of equipment.

In addition, changes in governmental regulations, safety or other equipment standards, as well as compliance with standards imposed by maritime self-regulatory organizations, standards imposed by vessel classification societies and customer requirements or competition, may require us to make significant additional expenditures. For example, if the U.S. Coast Guard enacts new standards, we may be required to incur expenditures for alterations or the addition of new equipment (e.g. more fuel-efficient engines). In order to satisfy any such requirements, we may need to take our vessels out of service for extended periods of time, with corresponding losses of revenues.

Equipment or mechanical failures could result in increased costs, project delays and reduced revenues.

The successful performance of contracts requires a high degree of reliability of our vessels, barges and other equipment. The average age of our marine fleet as of December 31, 2023 was 25 years. Breakdowns not only add to the costs of executing a project, but they can also delay the completion of subsequent contracts, which are scheduled to utilize the same assets. We operate a scheduled maintenance program in order to keep all assets in good working order, but despite this, breakdowns can and do occur, resulting in loss of revenue.

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A pandemic, epidemic or outbreak of an infectious disease affecting our markets or impacting our facilities or suppliers could adversely impact our business.

If another pandemic, epidemic or outbreak of an infectious disease or other public health crisis were to affect our markets or facilities or those of our suppliers, our business could be adversely affected. Another pandemic could cause disruptions in and restrictions on our ability to travel, and in the future these disruptions and restrictions could restrict our ability to perform work for future projects in different locations. If an infectious disease were to have a widespread outbreak at one or more of our vessels or facilities, our operations may be affected significantly, our productivity may be affected, key personnel necessary to conduct our operations or replacement crew may be unavailable, our ability to complete projects in accordance with our contractual obligations may be affected and we may incur increased labor and materials costs. If the shipyards with which we contract were affected by an outbreak of infectious disease, repairs of our vessels as well as new construction may be delayed and we may incur increased labor and materials costs. In addition, we may experience difficulties with certain suppliers or with vendors in their supply chains, and our business could be affected if we become unable to procure essential supplies or services in adequate quantities and at acceptable prices.

Our clients, which are the Corps, private clients and other federal, state or local agencies, may be impacted by a pandemic, and if prolonged, these impacts may lead to cancelations or delays in projects. Funds for dredging projects may also be diverted for public health, economic or other priorities. Overall, the potential impact of a pandemic, epidemic or outbreak of an infectious disease with respect to our markets or our facilities is difficult to predict and could adversely impact our business.

We have experienced, and may continue to experience, project delays and supply chain issues as a result of COVID-19 and its variants. In addition, certain of our contractors, such as shipyards and subcontractors on projects, have experienced and may continue to experience personnel issues, which might delay our new build program and maintenance of our vessels. These delays and increased costs could continue in the future, and may increase if new, more deadly, variants arise and become widespread, or if a new, unanticipated global or domestic health emergency should arise. We may have additional delays or cancelations in current or future projects. Funds for dredging projects may also be diverted for public health, economic, or other priorities. We may experience adverse impacts to our business as a result of COVID-19 and its variants, as well as currently unknown or anticipated global health emergencies, and their respective effects on global economies and financial markets, including any recession or economic downturn that has occurred or may occur in the future.

Disruptions to our supply chain affecting our markets or impacting our facilities or suppliers could prohibit procurement of materials necessary for maintenance of our existing vessels and new vessel build materials and adversely impact our business.

Supply chain issues could cause disruptions that restrict our ability to perform work for future projects. Our ability to complete projects in accordance with our contractual obligations may be affected, and we may incur increased labor and materials costs. If the shipyards with which we contract are affected, regulatory drydocking and repairs and general maintenance of our vessels, as well as new construction, may be delayed and we may incur increased labor and materials costs. In addition, we may experience difficulties with certain suppliers or with vendors in their supply chains, and our business could be affected if we become unable to procure essential supplies or services in adequate quantities and at acceptable prices.

Environmental regulations could force us to incur capital and operational costs.

Our industries, and more specifically, our operations, facilities and vessels and equipment, are subject to various environmental laws and regulations relating to, among other things: dredging operations; the disposal of dredged material; protection of wetlands; storm water and waste water discharges; transportation and disposal of hazardous wastes and other regulated materials; air emissions; and disposal or remediation of contaminated soil, sediments, surface water and groundwater. We are also subject to laws designed to protect certain marine or land species and habitats. Compliance with these statutes and regulations can delay permitting and/or performance of particular projects and increase related project costs. These delays and increased costs could have a material adverse effect on our business, results of operations, cash flows or financial condition. Non-compliance can also result in fines, penalties and claims by third parties seeking damages for alleged personal injury, as well as damages to property and natural resources and suspension or debarment from future government contracting.

Certain environmental laws such as the U.S. Comprehensive Environmental Response, Compensation and Liability Act of 1980 and the Oil Pollution Act of 1990 impose strict and, under some circumstances, joint and several, liability on owners and lessees of land and facilities as well as owners and operators of vessels. Such obligations may include investigation and remediation of releases and discharges of regulated materials, and also impose liability for related damages to natural resources. Our past and ongoing operations involve the use, and from time to time the release or discharge, of regulated materials which could result in liability under these and other environmental laws. We have remediated known releases and discharges as deemed necessary, but there can be no guarantee that additional costs will not be incurred if, for example, third party claims arise or new conditions are discovered.

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Our projects may involve excavation, remediation, demolition, transportation, management and disposal of hazardous waste and other regulated materials. Various laws strictly regulate the removal, treatment and transportation of hazardous waste and other regulated materials and impose liability for human health effects and environmental contamination caused by these materials. Services rendered in connection with hazardous substance and material removal and site development may involve professional judgments by licensed experts about the nature of soil conditions and other physical conditions, including the extent to which hazardous substances and materials are present, and about the probable effect of procedures to mitigate problems or otherwise affect those conditions. If the judgments and the recommendations based upon those judgments are incorrect, we may be liable for resulting damages, which may be material. The failure of certain contractual protections to protect us from incurring such liability, such as staying out of the ownership chain for hazardous waste and other regulated materials and securing indemnification obligations from our customers or subcontractors, could have a material adverse effect on our business, results of operations, revenues or profits.

Environmental requirements have generally become more stringent over time, for example in the areas of air emissions controls for vessels and ballast treatment and handling. New laws or stricter enforcement of existing laws or, the discovery of currently unknown conditions or accidental discharges of regulated materials in the future could cause us to incur additional costs for environmental matters which might be significant.

We may be affected by market or regulatory responses to climate change.

Increased concern about the potential impact of greenhouse gases (“GHG”), such as carbon dioxide resulting from combustion of fossil fuels, on climate change has resulted in efforts to regulate their emission. Legislation, international protocols, regulation or other restrictions on GHG emissions could also affect our customers. Such legislation or restrictions could increase the costs of projects for our customers or, in some cases, prevent a project from going forward, thereby potentially reducing the need for our services which could in turn have a material adverse effect on our operations and financial condition. Additionally, in our normal course of operations, we use a significant amount of fossil fuels. The costs of controlling our GHG emissions or obtaining required emissions allowances in response to any regulatory change in our industry could increase materially.

Both the Securities Exchange Commission and the Federal Acquisition Regulatory Council have proposed regulations which would require us to report emissions data from our operations. If implemented, these regulations may require a substantial outlay of capital by the Company, as well as management time and attention to ensure the Company's compliance.

Penalties for late completion of contracts could reduce our profits.

In many instances, including in our fixed-price contracts, we guarantee that we will complete a project by a scheduled date. If we subsequently fail to complete the project as scheduled, we may be liable for any customer losses resulting from such delay, generally in the form of contractually agreed-upon liquidated damages. In addition, failure to maintain a required schedule could cause us to default on our government contracts, giving rise to a variety of potential damages. To the extent that these events occur, the total costs of the project could exceed our original estimates, and we could experience reduced profits or, in some cases, a loss for that project.

Force majeure events could negatively impact our business, operations, revenues, cash flows and profits.

Force majeure or extraordinary events beyond the control of the contracting parties, such as natural and man-made disasters, as well as terrorist actions, could negatively impact the economies in which we operate. We typically negotiate contract language where we are allowed certain relief from force majeure events in private client contracts and review and attempt to mitigate force majeure events in both public and private client contracts. We remain obligated to perform our services after most extraordinary events subject to relief that may be available pursuant to a force majeure clause.

If a contract contains a force majeure provision, we may be able to obtain an extension of time to complete our obligations under such contract, but we will still be subject to our other contractual obligations in the event of such an extraordinary event. Because we cannot predict the length, severity or location of any potential force majeure event, it is not possible to determine the specific effects any such event may have on us. Depending on the specific circumstances of any particular force majeure event, or if we are unable to react quickly to such an event, our operations may be affected significantly, our productivity may be affected, our ability to complete projects in accordance with our contractual obligations may be affected, our payments from customers may be delayed and we may incur increased labor and materials costs, which could have a negative impact on our financial condition, relationships with customers or suppliers, and our reputation.

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The amount of our estimated backlog may change and may not be indicative of future revenues.

Our contract backlog represents our estimate of the revenues that we will realize under the portion of the contracts remaining to be performed. These estimates are based primarily upon the time and costs required to mobilize the necessary assets to and from the project site, the amount and type of material to be dredged and the expected production capabilities of the equipment performing the work. However, these estimates are necessarily subject to variances based upon actual circumstances. From time to time, changes in project scope may occur with respect to contracts reflected in our backlog and could reduce the dollar amount of our backlog and the timing of the revenue and profits that we actually earn. Projects may remain in our backlog for an extended period of time because of the nature of the project and the timing of the particular services or equipment required by the project.

Because of these factors, as well as factors affecting the time required to complete each job, backlog is not necessarily indicative of future revenues or profitability. In addition, a significant amount of our backlog (34% as of December 31, 2023) relates to federal government contracts, which can be canceled at any time without penalty to the government, subject, in most cases, to our contractual right to recover our actual committed costs and profit on work performed up to the date of cancellation.

Below is our backlog from federal government contracts as of December 31, 2023, 2022, and 2021 and the percentage of those contracts to total backlog as of the same date.

	Year Ended December 31,
	2023			2022			2021
Federal government backlog (in US $1,000)	$	350,242		$	290,694		$	341,768
Percentage of backlog from federal government		34	%		77	%		62	%

Although we do not currently have any international projects, if we were to engage in a new foreign project, we may have backlog with foreign governments that use local laws and regulations to change terms of a contract in backlog or to limit our ability to receive payment on a timely basis. In addition to our United States federal contracts, our other contracts in backlog are with state and local municipalities or private companies that may have funding constraints or impose restrictions on timing. The termination, modification or suspension of projects currently in backlog could have a material adverse effect on our business, operating results, cash flows or financial condition. As of December 31, 2023, approximately 50% of the Company’s backlog is from two private customers.

Loss of a single customer contract could significantly decrease revenue.

Prospective customers may be incentivized to use another dredging company other than the Company. The Company could lose future contracts for work to competitors or could be forced to accept lower margins on contracts. Lower utilization, workforce reductions or asset relocations could have a material adverse effect on our business, operating results, cash flows or financial condition.

While the Company does not currently have significant operations or equipment in the Middle East, we may seek contracts there in the future. Certain factors have occurred suggesting that future revenues from projects with governments in the Middle East could decrease. The contraction in Middle East commercial and real estate development have slowed the rate of the region’s infrastructure development. If the diplomatic relationship of the United States or our commercial relationship with governments in the Middle East is significantly negatively impacted or terminated, or we encounter significant difficulties in obtaining licensing or permits to do business in these countries, the Company’s international revenues would be materially and adversely impacted. If the government of Bahrain or Saudi Arabia further curtails its infrastructure investment or diversifies its use of dredging vendors, our revenue from these customers could decline further.

Inability to obtain secure financing or financing on favorable terms for our new vessels.

We have previously disclosed our plans to build new vessels which requires significant capital expenditures. Unforeseen issues could arise in our ability to obtain secure financing or to obtain secure financing on terms favorable to us for building such vessels. This includes our new offshore wind vessel, the second new build hopper dredge, and other potential future vessels. The inability to obtain favorable financing may also impact our ability to bring the new vessels into service within the timeline anticipated by the Company, which may have an adverse effect on our business, financial position and/or results of operations.

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Inability to secure contracts to utilize new offshore wind vessel.

We have previously disclosed the build of our new offshore wind vessel that is in progress. Our ability to obtain customers and/or contracts on terms favorable to the Company to utilize this new vessel for subsea rock installation for wind turbines could be impacted by unforeseen market conditions. As the costs to build this new vessel have already been incurred, the lack of a secure customer base and favorable secure contracts could have a material adverse effect on the Company’s business, financial position and results of operations. Towards the end of 2023, the Company saw several cancellations of Power Purchase Agreements (“PPA’s”) that were entered into in 2018 and 2019, as inflation and interest rate hikes eroded the profitability of these PPA’s. This led our clients, Equinor and bp, to terminate our Empire Wind II contract and reset their plan for the related wind farm. Great Lakes may have the opportunity to re-tender this project, if Equinor re-bids their PPA for this development. If there are additional cancellations of PPA’s, the Company’s ability to utilize its new offshore wind vessel may be adversely impacted.

Unforeseen delays and cost overruns could delay or halt plans to build new vessels and, as a result, negatively impact our business strategy.

We have previously disclosed our plans to build new vessels. Unknown mechanical or engineering issues involving new vessels could adversely affect the Company’s business, operating results, cash flows or financial condition. Our future revenues and profitability will also be impacted to some extent by our ability to secure financing for new vessels and bring them into service within the timeline anticipated by the Company. The Company contracts with shipyards to build new vessels and currently has vessels under construction. Construction projects are subject to risks of delay and cost overruns, resulting from shortages of equipment, materials and skilled labor; lack of shipyard availability; unforeseen design and engineering problems; work stoppages; weather interference; unanticipated cost increases; unscheduled delays in the delivery of material and equipment; and financial and other difficulties at shipyards including labor disputes, shipyard insolvency and inability to obtain necessary certifications and approvals. Delays may also occur as a result of a shipyard giving priority to other customers. A significant delay in the construction of new vessels or a shipyard’s inability to perform under the construction contract could negatively impact the Company’s ability to fulfill contract commitments and to realize timely revenues with respect to vessels under construction. Significant cost overruns or delays for vessels under construction could also adversely affect the Company’s business, operating results, cash flows or financial condition. Changes in governmental regulations, safety or other equipment standards, as well as compliance with standards imposed by maritime self-regulatory organizations and customer requirements or competition, could also substantially increase the cost of such construction beyond what we currently expect such costs to be.

We have previously disclosed our plans to expand into the offshore wind market. Unknown changes to environmental needs and regulations and changes in the policies of the U.S. Presidential Administration could delay or halt plans to expand our new offshore wind projects, which would adversely impact our business strategy and affect the Company’s operating results, cash flows or financial condition. Our future revenues and profitability will also be impacted to some extent if we are unable to obtain favorable steel prices or unable to obtain secure financing for new offshore wind vessels and bring them into service within the timeline anticipated by the Company.

Our business would be adversely affected if we failed to comply with Jones Act provisions on coastwise trade, or if those provisions were modified or repealed.

We are subject to the Jones Act and other federal laws that restrict dredging in U.S. waters and maritime transportation between points in the United States to vessels operating under the U.S. flag, built in the United States, at least 75% owned and operated by U.S. citizens and manned by U.S. crews. We are responsible for monitoring the ownership of our common stock to ensure compliance with these laws. If we do not comply with these restrictions, we would be prohibited from operating our vessels in the U.S. market, and under certain circumstances we would be deemed to have undertaken an unapproved foreign transfer, resulting in severe penalties, including permanent loss of U.S. dredging rights for our vessels, fines or forfeiture of the vessels.

In the past, interest groups have unsuccessfully lobbied Congress to modify or repeal the Jones Act to facilitate foreign flag competition for trades and cargoes currently reserved for U.S. flag vessels under the Jones Act. We believe that continued efforts may be made to modify or repeal the Jones Act or other federal laws currently benefiting U.S. flag vessels. If these efforts are ever successful, it could result in significantly increased competition and have a material adverse effect on our business, results of operations, cash flows or financial condition.

In addition, Customs and Border Protection (“CBP”), the federal agency that interprets the Jones Act, may issue letter rulings which adversely impact our business. In the past, CBP has issued letter rulings which have the potential to adversely impact Jones Act qualified vessels to be the exclusive operators in certain sectors of the new United States offshore wind industry. The Company has challenged these CBP letter rulings in federal court in Houston, Texas, citing the “Plain Language” of the Jones Act. This challenge was rejected at the District Court level and the Company has appealed to the 5th Circuit. An adverse ruling in this suit, as well as other

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adverse letter rulings by CBP, may adversely impact our competitive advantage in the United States offshore wind industry, which could have a material adverse effect on our business, results of operations, cash flows or financial condition.

Our operating costs depend significantly on the price of petroleum-based products, and price increases could adversely affect our profits.

Fuel prices fluctuate based on market events outside of our control. We use diesel fuel and other petroleum-based products to operate our equipment used in our dredging contracts. Fluctuations in supplies relative to demand and other factors can cause unanticipated increases in their cost. Most of our contracts do not allow us to adjust our pricing for higher fuel costs during a contract term and we may be unable to secure price increases reflecting rising costs when renewing or bidding contracts. In addition, the International Maritime Organization issued regulations regarding use of low sulfur fuel, which has increased the demand for low sulfur fuel. We use low sulfur fuel in many of our domestic operations, and future increases in the costs of fuel and other petroleum-based products used in our business, particularly if a bid has been submitted for a contract and the costs of those products have been estimated at amounts less than the actual costs thereof, could result in a lower profit, or even a loss, on one or more contracts.

Our investing and operating costs depend significantly on the prices of new build and general maintenance and repair materials, and price increases due to high nationwide inflation could adversely affect our profits.

The prices of steel and other materials to build and develop new vessels, as well as to maintain and/or repair our existing vessels, fluctuate based on market events outside of our control. This had an adverse effect on our results of operations in 2022, however did not have a material adverse effect on our results of operations in 2023. Most of our new build contracts do not allow us to adjust our pricing for higher material costs during a contract term. When renewing contracts, we may be unable to secure price increases reflecting the rising costs of inflation. Such future increases in the costs of steel and other materials used to build new vessels, particularly if a bid or renewal has been submitted for a contract and the costs of the required products have been estimated at amounts less than the actual costs incurred, could result in a lower profit, or even a loss, on one or more contracts. Additionally, the increased cost of steel and other materials may adversely impact the cost of general maintenance and/or repairs of our existing vessels.

An inability to obtain bonding or letters of credit would limit our ability to obtain future contracts, which could, along with any draws on existing arrangements, adversely affect our business, operating results, cash flows and financial condition.

We are generally required to post bonds in connection with our domestic dredging contracts and bonds or letters of credit with our foreign dredging contracts, certain private domestic dredging contracts, and offshore wind contracts to ensure job completion if we ever fail to finish a project. We have entered into bonding agreements with the sureties, or the “Sureties”, pursuant to which the Sureties issue bid bonds, performance bonds and payment bonds, and provide guarantees required by us in the day-to-day operations of our dredging business. Historically, we have had a strong bonding capacity, but surety companies issue bonds on a project-by-project basis and can decline to issue bonds at any time or require the posting of collateral as a condition to issuing any bonds. With respect to our foreign dredging, certain private domestic dredging, and our offshore wind business, we generally obtain letters of credit under our Amended Credit Agreement. However, access to our senior credit facility under our Amended Credit Agreement may be limited by failure to meet certain levels of availability or other defined financial or other requirements. If we are unable to obtain bonds or letters of credit on terms reasonably acceptable to us, our ability to take on future work would be severely limited.

In connection with the sale of our historical demolition business, we were obligated to keep in place the surety bonds on pending demolition projects for the period required under the respective contract for a project. In 2017, we were notified by Zurich of an alleged default triggered on a historical demolition surety performance bond in the aggregate amount of approximately $20 million for failure of the contractor to perform in accordance with the terms of a project. Zurich drew upon the letter of credit in the amount of $20.9 million. In order to fund the draw on the letter of credit, we had to increase the borrowings on our revolving credit facility. As the outstanding letters of credit previously reduced our availability under the revolving credit facility, this draw down on our letter of credit did not impact our liquidity or capital availability. However, in the future, other defaults (or alleged defaults) triggered under any of our surety bonds could have a material adverse effect on our business, results of operations, cash flows or financial condition.

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Acquisitions involve integration, consolidation and strategic risks and may involve significant transaction expenses and unexpected liabilities, which could adversely affect our business and results of operations.

We may seek business acquisition activities in the future as a means of broadening our offerings and capturing additional market opportunities by our business units. We may be exposed to certain additional risks resulting from these activities. Acquisitions may expose us to operational challenges and risks, including:

•the effects of valuation methodologies which may not accurately capture the value proposition;

•the failure to integrate acquired businesses into our operations, financial reporting and controls with the efficiency and effectiveness initially expected resulting in a potentially significant detriment to our financial results and our operations as a whole;

•the management of the growth resulting from acquisition activities;

•the inability to capitalize on expected synergies;

•the assumption of liabilities of an acquired business (for example, litigation, tax liabilities, environmental liabilities), including liabilities that were contingent or unknown at the time of the acquisition and that pose future risks to our working capital needs, cash flows and the profitability of related operations;

•the assumption of unprofitable projects that pose future risks to our working capital needs, cash flows and the profitability of related operations;

•the risks associated with entering new markets;

•diversion of management’s attention from our existing business;

•failure to retain key personnel, customers or contracts of any acquired business;

•potential adverse effects on our ability to comply with terms and covenants in our existing debt financing;

•potential impairment of acquired intangible assets; and

•additional debt financing, which may not be available on attractive terms.

We may not have the appropriate management, financial or other resources needed to integrate any businesses that we acquire. Any future acquisitions may result in significant transaction expenses and unexpected liabilities.

Divestitures and discontinued operations could negatively impact our business, and any retained liabilities could adversely affect our financial results.

As part of our strategic process, we review our operations for assets and businesses which may no longer be aligned with our strategic initiatives and long-term objectives. For example, we have divested our historical environmental & infrastructure business and historical demolition business. We continue to review our assets and strategy and may pursue additional divestitures. Divestitures pose risks and challenges that could negatively impact our business, including required separation or carve-out activities and costs, disputes with buyers or potential impairment charges. We may also dispose of a business at a price or on terms that are less than we had previously anticipated or fail to close a transaction at all. Dispositions may also involve continued financial involvement, as we may be required to retain responsibility for, or agree to indemnify buyers against contingent liabilities related to businesses sold, such as lawsuits, surety obligations, tax liabilities, or environmental matters. It may also be difficult to determine whether a claim from a third party stemmed from actions taken by us or by another party and we may expend substantial resources trying to determine which party has responsibility for the claim. Under these types of arrangements, performance by the divested businesses or other conditions outside of our control could affect future financial results and such claims or conditions may divert management attention from our continuing business.

During the second quarter of 2014, the Company completed the sale of its historical demolition business. In connection with the sale, the Company retained responsibility for various pre-closing liabilities and obligations and may incur costs and expenses related to these items and asset recoveries. It is possible that claims, which could be material, could be made against the Company by virtue of the agreement pursuant to which the Company’s historical demolition business was sold. In connection with the sale of our historical demolition business, we were obligated to keep in place the surety bonds on pending demolition projects for the period required under the respective contract for a project. As noted above, if there should be a default (or alleged default) triggered under any of the surety bonds for the historical demolition business, it could have a material adverse effect on our ability to obtain bonds and on our business, results of operations, cash flows or financial condition.

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During the second quarter of 2019, the Company completed the sale of the historical environmental & infrastructure business. The Company retained responsibility for pre-closing liabilities and indemnification for breaches of our representations and warranties in the sale agreement. If the buyer made a claim against any of our indemnifications or if any payments became due in connection with any pre-closing liability, they could be material to results of operations, cash flows or financial condition.

If we do not realize the expected benefits or synergies of any divestiture transaction or if we underestimated the valuation of the charge related to placing an asset held for sale in discontinued operations, our consolidated financial position, results of operations and cash flows could be negatively impacted. Any divestiture may result in a dilutive impact to our future earnings if we are unable to offset the dilutive impact from the loss of revenue associated with the divestiture, as well as significant write-offs, including those related to goodwill and other intangible assets, which could have a material adverse effect on our results of operations and financial condition.

We could face liabilities and/or damage to our reputation as a result of legal and regulatory proceedings.

We operate in a highly regulated environment with constantly evolving legal and regulatory frameworks. From time to time, we are subject to legal and regulatory proceedings in the ordinary course of our business. These include proceedings relating to aspects of our businesses that are specific to us and proceedings that are typical in the businesses in which we operate.

We are currently a defendant in a number of litigation matters, including those described in Item 3. “Legal Proceedings” of this Annual Report on Form 10-K. In certain of these matters, the plaintiffs are seeking large and/or indeterminate amounts of damages. These matters are also subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved or settled adversely to the Company. An adverse outcome in a legal or regulatory matter could, depending on the facts, have an adverse effect on our business, results of operations, cash flows or financial condition.

Furthermore, whether the ultimate outcomes are favorable or unfavorable, these matters can also have significant adverse reputational impacts, including negative publicity and press speculation about us, whether valid or not, which may be damaging to our business, results of operations, cash flows or financial condition.

Liabilities for the obligations of our joint ventures, partners and subcontractors could materially decrease our profitability and liquidity.

Some of our projects are performed through joint ventures and similar arrangements with other parties. In addition to the usual liability of contractors for the completion of contracts and the warranty of our work, if work is performed through a joint venture or similar arrangement, we also have potential liability for the work performed by the joint venture or arrangement or a performance or payment default by another member of the joint venture or arrangement. In these projects, even if we satisfactorily complete our project responsibilities within budget, we may incur additional unforeseen costs due to the failure of the other party or parties to the arrangement to perform or complete work, fund expenditures, or make payments in accordance with contract specifications. In some joint ventures and similar arrangements, we may not be the controlling member. In these cases, we may have limited control over the actions of the joint venture. In addition, joint ventures or arrangements may not be subject to the same requirements regarding internal controls and internal control over financial reporting that we follow. To the extent the controlling member makes decisions that negatively impact the joint venture or arrangement or internal control problems arise within the joint venture or arrangement, it could have a material adverse impact on our business, results of operations, cash flows or financial condition.

Depending on the nature of work required to complete the project, we may choose to subcontract a portion of the project. In our industries, the prime contractor is often responsible for the performance of the entire contract, including subcontract work. Thus, we are subject to risks associated with the failure of one or more subcontractors to perform as anticipated. In addition, in some cases, we pay our subcontractors before our customers pay us for the related services. If we choose, or are required, to pay our subcontractors for work performed for customers who fail to pay, or delay paying us for the related work, we could experience a material decrease in profitability and liquidity.

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New tariffs have increased our costs and could adversely affect our business operations, revenues and profits.

In recent years, the United States has imposed Section 232 tariffs and other import taxes on certain steel and aluminum products, such as imported dredge-related machinery and pipes. These tariffs and other import taxes have increased the prices of these inputs. Increased prices for imported steel and aluminum products have led domestic sellers to respond with market-based increases to prices for such inputs as well. We cannot be sure of the ultimate effect such tariffs or any additional import taxes will have on our operating profits. If we are not able to pass these price increases on to our customers or to secure adequate alternative sources for such inputs on a timely basis, the tariffs and other import taxes may have a material adverse effect on our business operations, revenues and profits.

Our business could suffer in the event of a work stoppage by our unionized labor force.

We are a party to numerous collective bargaining agreements in the U.S. that govern our industry’s relationships with our unionized hourly workforce. Two unions represent approximately 69% of our hourly dredging employees—the IUOE Local 25 and the Seafarers International Union. The Company’s master and ancillary contracts with IUOE Local 25 expire in September 2024 and negotiations will begin in the second quarter of 2024 for a renewal agreement. Our agreements with the Seafarers International Union expire in February 2026. While we expect that the membership will have a tentative agreement before expiration of the current agreement, we cannot be certain that will occur. The inability to successfully renegotiate contracts with these unions as they expire, or any future strikes, employee slowdowns or similar actions by one or more unions could have a material adverse effect on our ability to operate our business.

Liabilities imposed by federal laws for job-related claims by seagoing employees could increase our costs and reduce our profitability.

Substantially all of our maritime employees are covered by provisions of the Jones Act, the U.S. Longshore and Harbor Workers’ Compensation Act, the Seaman’s Wage Act and general maritime law. These laws typically operate to make liability limits established by state workers’ compensation laws inapplicable to these employees and to permit these employees and their representatives to pursue actions against employers for job-related injuries in federal or state courts. Because we are not generally protected by the limits imposed by state workers’ compensation statutes with respect to our seagoing employees, we have greater exposure for claims made by these employees as compared to industries whose employees are not covered by these provisions. Successful claims could materially increase our costs and reduce our profitability. Further, the number and resolution of these claims could increase our insurance costs.

The significant operating risks and hazards inherent in the operation of our business could result in personal or property damage, which could result in losses or liabilities to us.

The dredging business is generally subject to a number of risks and hazards, including environmental hazards, industrial accidents, encountering unusual or unexpected geological formations, cave-ins below water levels, collisions, disruption of transportation services, flooding and unexploded ordnance. These risks could result in personal injury, damage to or destruction of, dredges, barges transportation vessels, other maritime vessels, other structures, buildings or equipment, environmental damage, performance delays, monetary losses or legal liability to third parties. We may also be exposed to disruption of our operations, early termination of projects, unanticipated recovery costs and loss of use of our equipment that may materially adversely affect our business, results of operations, cash flows or financial condition.

Our safety record is an important consideration for our customers. Some of our customers require that we maintain certain specified safety record guidelines to be eligible to bid for contracts with these customers. Furthermore, contract terms may provide for automatic termination or forfeiture of some of our contract revenue in the event that our safety record fails to adhere to agreed-upon guidelines during performance of the contract. As a result, if serious accidents or fatalities occur or our safety record were to deteriorate, we may be ineligible to bid on certain work, and existing contracts could be terminated or less profitable than expected. Adverse experience with hazards and claims could have a negative effect on our reputation with our existing or potential new customers and our prospects for future work.

We may be unable to identify and contract with qualified MBE or DBE contractors to perform as subcontractors, which could materially and adversely impact our financial position, results of operations, cash flows and liquidity.

Certain of our government agency projects contain goals for minimum minority business enterprise (“MBE”) and/or disadvantaged business enterprise (“DBE”) participation clauses. If we subsequently fail to reach our goals for the minimum MBE and/or DBE participation, we may be held responsible for breach of contract, which may include restrictions on our ability to bid on

23

future projects as well as monetary damages. To the extent we are responsible for monetary damages, the total costs of the project could exceed our original estimates, we could experience reduced profits or a loss for that project and there could be a material adverse impact to our financial position, results of operations, cash flows and liquidity.

Risks Related to our Financing

We have substantial indebtedness, which makes us more vulnerable to adverse economic and competitive conditions.

We currently have a substantial amount of indebtedness. As of December 31, 2023, we had indebtedness of $415.0 million, consisting of our senior subordinated notes and borrowings on our revolving credit facility. As of December 31, 2023, we had approximately $49.8 million of undrawn letters of credit, leaving $122.3 million of additional borrowing capacity under our revolving credit facility. These figures exclude contingent obligations, including $960.9 million of performance bonds outstanding under the Company’s agreements with the Sureties and other bonding agreements. Our level of indebtedness could:

•require us to dedicate a portion of our cash flow from operations to payments on our indebtedness, thereby reducing the availability of our cash flow to fund working capital and capital expenditures, pay dividends and other general corporate purposes;

•limit our flexibility in planning for, or reacting to, changes in our business and our industries;

•affect our competitiveness compared to our less leveraged competitors;

•increase our exposure to both general and industry-specific adverse economic conditions; and

•limit, among other things, our ability to borrow additional funds and issue performance letters of credit.

We and our subsidiaries also may be able to incur substantial additional indebtedness in the future. The terms of our revolving credit facility and the indenture under which our senior subordinated notes are issued limit, but do not prohibit, us or our subsidiaries from incurring additional indebtedness. If new indebtedness is added to our current debt levels, the related risks that we and our subsidiaries now face could intensify.

Terms and covenants in our financing arrangements limit, and other future financing agreements may limit, our ability to operate our business.

The credit agreement governing our senior revolving credit facility and the indenture governing our senior notes contain, and any of our other future financing agreements may contain terms and covenants imposing operating and financial restrictions on our business.

For example, the maximum borrowing capacity under the Amended Credit Agreement is determined by a formula and may fluctuate depending on the value of the collateral included in such formula at the time of determination. If the value of our collateral were to decrease, our borrowing capacity on which we are able to draw additional funds or issue letters of credit could be limited. In addition, the credit agreement governing our senior revolving credit facility requires us to satisfy a fixed charge coverage ratio under certain circumstances. If we fail to satisfy such covenant, we would be in default and the lenders (through the administrative agent or collateral agent, as applicable) could elect to declare all amounts outstanding to be immediately due and payable, enforce their interests in the collateral pledged and/or restrict our ability to make additional borrowings, as applicable. The covenants in the credit agreement governing our senior revolving credit facility and the indenture governing our senior notes, subject to specified exceptions and to varying degrees, restrict our ability to, among other things:

•incur additional indebtedness;

•create, incur, assume or permit to exist any liens;

•enter into sale and leaseback transactions;

•enter into operating and finance leases;

•make investments, loans and advancements;

•merge, consolidate or reorganize with, or dispose of all or substantially all assets to, a third party;

•sell assets;

•make acquisitions;

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•pay dividends;

•enter into transactions with affiliates;

•prepay or redeem other indebtedness; and

•issue certain types of capital stock.

These restrictions may interfere with our ability to obtain financings or to engage in other business activities, which could have a material adverse effect on our results of operations, cash flows or financial condition.

Adverse capital and credit market conditions may affect our ability to access capital and meet liquidity needs.

The domestic and worldwide capital and credit markets may experience significant volatility, disruptions and dislocations with respect to price and credit availability. Should we need additional funds or to refinance our existing indebtedness, we may not be able to obtain such additional funds or refinancing on acceptable terms, or at all.

We need liquidity to pay our operating and capital expenses, interest on our debt and remaining obligations on our new build program. Without sufficient liquidity, we will be forced to curtail our operations, and our business will suffer. The principal sources of our liquidity are cash flow from operations and borrowings under our senior revolving credit facility. Earnings from our operations and our working capital requirements can vary significantly from period to period based primarily on the mix of our projects underway and the percentage of project work completed during the period. Capital expenditures may also vary significantly from period to period. While we manage cash requirements for working capital and capital expenditure needs, unpredictability in cash collections and payments has required us in the past and may in the future require us to borrow on our line of credit from time to time to meet the needs of our operations.

In the event these resources do not satisfy our liquidity needs, we may have to seek additional financing. The availability of additional financing will depend on a variety of factors such as market conditions, the general availability of credit, the volume of trading activities, our credit ratings and credit capacity, as well as the possibility that customers or lenders could develop a negative perception of our long- or short-term financial prospects if the level of our business activity decreased due to a market downturn. If internal sources of liquidity prove to be insufficient, we may not be able to successfully obtain additional financing on favorable terms, or at all. In March 2023, S&P Global Ratings (“S&P”) downgraded our corporate credit rating to CCC+ with a negative outlook from B with a stable outlook, and Moody’s Investor Services (“Moody’s”) downgraded our corporate credit rating to B3 with a negative outlook from B2 with a stable outlook. These credit ratings are below investment grade and could raise our cost of financing. As a consequence, we may not be able to issue additional debt in amounts and/or with terms that we consider to be reasonable. One or more of these occurrences could limit our ability to pursue other business opportunities.

Regulatory requirements for derivative transactions could adversely impact our ability to hedge interest rate, currency or commodity risks.

We may enter into interest rate swap agreements to manage the interest rate paid with respect to our fixed rate indebtedness, foreign exchange forward contracts to hedge currency risk and heating oil commodity swap contracts to hedge the risk that fluctuations in diesel fuel prices will have an adverse impact on cash flows associated with our domestic dredging contracts. The Dodd-Frank Wall Street Reform and Consumer Protection Act (“Dodd-Frank”) and regulations adopted by a number of U.S. federal regulatory agencies created a comprehensive statutory and regulatory framework for derivative transactions, including foreign currency and other over-the-counter derivative hedging transactions. While a number of provisions of Dodd-Frank have been implemented, certain key provisions have not yet been implemented or remain subject to uncertainty. Furthermore, certain provisions of Dodd-Frank may be modified or repealed in the future. Any substantial change in the financial regulatory environment could create additional new compliance costs for us or cause us to alter the manner in which we manage risk, which could have a materially adverse effect on our business. The rules adopted or to be adopted under Dodd-Frank may significantly reduce our ability to execute strategic hedges to manage our interest expense, reduce our fuel commodity uncertainty and hedge our currency risk thus protecting our cash flows. In addition, the banks and other derivatives dealers who are our contractual counterparties are required to comply with extensive regulation under Dodd-Frank. The cost of our counterparties’ compliance will likely be passed on to customers such as ourselves, thus potentially decreasing the benefits to us of hedging transactions and potentially reducing our profitability.

We may be subject to foreign exchange risks, which could result in large cash losses.

We are exposed to market risk associated with changes in foreign currency exchange rates. The primary foreign currencies to which the Company has exposure are the Bahraini Dinar and the Euro. We have unhedged foreign currency exposure related to the

25

new inclined fall-pipe vessel for subsea rock installation build. Our international contracts may be denominated in foreign currencies, which will result in additional risk of fluctuating currency values and exchange rates, hard currency shortages and controls on currency exchange. Changes in the value of foreign currencies could increase our U.S. dollar costs for, or reduce our U.S. dollar revenues from, our foreign operations. Any increased costs or reduced revenues as a result of foreign currency fluctuations could affect our profits.

Our investments in, and extensions of payment terms for, privately financed projects could result in significant losses.

We have participated and may continue to participate in privately financed projects that enable state and local governments and other customers to finance dredging, such as dredging of local navigable waterways and lakes, coastal protection and infrastructure projects. These projects typically include the facilitation of non-recourse financing and the provision of dredging, environmental, infrastructure, and related services. We may incur contractually reimbursable costs and may accept extended payment terms, extend debt financing and/or make an equity investment in an entity prior to, in connection with, or as part of project financing, and in some cases we may be the sole or primary source of the project financing. Project financing may also involve the use of real estate, environmental, wetlands or similar credits. If a project is unable to obtain other financing on terms acceptable to it in amounts sufficient to repay or redeem our investments, we could incur losses on our investments and any related contractual receivables. After completion of these projects, the return on our equity investments can be dependent on the operational success of the project and market factors or sale of the aforementioned credits, which may not be under our control. As a result, we could sustain a loss of part or all of our equity investments in such projects or have to recognize the value of the credits at a lower amount than expected in the contract bid.

Risks Related to our Stock

Our common stock is subject to restrictions on foreign ownership.

We are subject to government regulations pursuant to the Dredging Act, the Jones Act, the Shipping Act and the vessel documentation laws set forth in Chapter 121 of Title 46 of the United States Code. These statutes require vessels engaged in the transport of merchandise or passengers or dredging in the navigable waters of the U.S. to be owned and controlled by U.S. citizens. The U.S. citizenship ownership and control standards require the vessel-owning entity to be at least 75% U.S.-citizen owned. Our certificate of incorporation contains provisions limiting non-citizenship ownership of our capital stock. If our board of directors determines that persons who are not citizens of the U.S. own more than 22.5% of our outstanding capital stock or more than 22.5% of our voting power, we may redeem such stock. The required redemption price could be materially different from the current price of our common stock or the price at which the non-citizen acquired the common stock. If a non-citizen purchases our common stock, there can be no assurance that they will not be required to divest the shares and such divestiture could result in a material loss. Such restrictions and redemption rights may make our equity securities less attractive to potential investors, which may result in our common stock having a lower market price than it might have in the absence of such restrictions and redemption rights.

Delaware law and our charter documents may impede or discourage a takeover that our stockholders may consider favorable.

The provisions of our certificate of incorporation and bylaws may deter, delay or prevent a third-party from acquiring us. These provisions include:

•limitations on the ability of stockholders to amend our charter documents, including stockholder supermajority voting requirements;

•the inability of stockholders to call special meetings;

•a classified board of directors with staggered three-year terms;

•advance notice requirements for nominations for election to the board of directors and for stockholder proposals; and

•the authority of our board of directors to issue, without stockholder approval, up to 1,000,000 shares of preferred stock with such terms as the board of directors may determine and to issue additional shares of our common stock.

We are also subject to the protections of Section 203 of the Delaware General Corporation Law, which prevents us from engaging in a business combination with a person who acquires at least 15% of our common stock for a period of three years from the date such person acquired such common stock, unless board or stockholder approval was obtained.

These provisions could have the effect of delaying, deferring or preventing a change in control of our company, discourage others from making tender offers for our shares, lower the market price of our stock or impede the ability of our stockholders to change our management, even if such changes would be beneficial to our stockholders.

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Our stockholders may not receive dividends because of restrictions in our debt agreements or Delaware law.

Our ability to pay dividends is restricted by the agreements governing our debt, including our Amended Credit Agreement, our bonding agreements and the indenture governing our senior unsecured notes. In addition, under Delaware law, our board of directors may not authorize payment of a dividend unless it is either paid out of our surplus, as calculated in accordance with the Delaware General Corporation Law, or, if we do not have a surplus, it is paid out of our net profits for the fiscal year in which the dividend is declared and/or the preceding fiscal year. To the extent we do not have adequate surplus or net profits, we will be prohibited from paying dividends.

Significant fluctuations in the market price of our common stock may affect the ability of holders to resell our common stock at prices that they find attractive.

The price of our common stock on the NASDAQ Global Market constantly changes. We expect that the market price of our common stock will continue to fluctuate. The market price of our common stock may fluctuate as a result of a variety of factors, many of which are beyond our control. These factors include:

•changes in market conditions;

•quarterly variations in our operating results;

•operating results that vary from the expectations of management, securities analysts and investors;

•changes in expectations as to our future financial performance;

•announcements of strategic developments, significant contracts, acquisitions and other material events by us or our competitors;

•the operating and securities price performance of other companies that investors believe are comparable to us;

•future sales of our equity or equity-related securities;

•changes in the economy and the financial markets;

•departures of key personnel;

•changes in governmental regulations; and

•geopolitical conditions, such as acts or threats of terrorism, political instability, civil unrest or military conflicts.

In addition, in recent years, global stock markets have experienced extreme price and volume fluctuations. This volatility has had a significant effect on the market price of securities issued by many companies for reasons often unrelated to their operating performance. These broad market fluctuations may adversely affect the market price of our common stock, regardless of our operating results.

Volatility in the financial markets could cause a decline in our stock price, which could trigger an impairment of the goodwill of individual reporting units that could be material to our consolidated financial statements. A significant drop in the price of our stock could also expose us to the risk of securities class action lawsuits, which could result in substantial costs and divert management's attention and resources, which could adversely affect our business. Additionally, volatility or a lack of positive performance in our stock price may adversely affect our ability to retain key employees, many of whom are awarded equity securities, the value of which is dependent on the performance of our stock price.

General Risk Factors

Our methods of accounting for recognizing revenue involve significant estimates and could result in a change in previously recorded revenue and profit.

We recognize revenue on our projects using generally accepted accounting principles in the United States (“GAAP”) including guidance from Revenue from Contracts with Customers, as amended (commonly referred to as ASC 606). The majority of our work is performed on a fixed-price basis. Contract revenue is recorded over time based on estimates which we develop from information known to us at the time of recording, but which may change. The cumulative impact of revisions to estimates is reflected in the period in which these changes are experienced or become known. Given the risks associated with the variables in these types of estimates, it

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is possible for actual costs to vary from estimates previously made, which may result in reductions or reversals of previously recorded net revenues and profits.

Our current insurance coverage may not be adequate, and we may not be able to obtain insurance at acceptable rates, or at all.

We maintain various insurance policies, including hull and machinery, pollution liability, general liability and personal injury. We partially self-insure risks covered by our policies. While we reserve for such self-insured exposures when appropriate for accounting purposes, we are not required to, and do not, specifically set aside funds for the self-insured portion of claims. We may not have insurance coverage or sufficient insurance coverage for all exposures potentially arising from a project. Furthermore, in situations where there is insurance coverage, if multiple policies are involved, we may be subject to a number of self-retention or deductible amounts which in the aggregate could have an adverse effect on our business, results of operations, cash flows or financial condition. At any given time, we are subject to Jones Act personal injury claims and claims from general contractors and other third parties for personal injuries. Our insurance policies may not be adequate to protect us from liabilities that we incur in our business. We may not be able to obtain similar levels of insurance on reasonable terms, or at all. Our inability to obtain such insurance coverage at acceptable rates or at all could have a material adverse effect on our business, results of operations, cash flows or financial condition.

If we are unable to find, attract and retain skilled labor and key personnel, including governance personnel, our business, results of operations, cash flows or financial condition could be materially and adversely affected.

Our ability to attract and retain reliable, qualified personnel is a significant factor that enables us to successfully bid for and profitably complete our work. This includes members of our board of directors, management, project managers, estimators, skilled engineers, supervisors, foremen, equipment operators and laborers. The loss of the services of any of our management could have a material adverse effect on us. If we do not succeed in retaining our current key employees and attracting, developing and retaining new highly-skilled employees, our reputation may be harmed and our operations and future earnings may be negatively impacted. We may not be able to maintain an adequate skilled labor force necessary to operate efficiently and to support our growth strategy. We have from time to time experienced, and may in the future experience, shortages of certain types of qualified equipment operating personnel. We have experienced, and may continue to experience, some difficulty finding skilled labor in the current labor shortage market. The supply of experienced engineers, project managers, field supervisors and other skilled workers may not be sufficient to meet current or expected demand. If we are unable to hire employees with the requisite skills, we may also be forced to incur significant training expenses. The occurrence of any of the foregoing could have an adverse effect on our business, results of operations, cash flows or financial condition.

In addition, any abrupt changes in our management or board of directors may lead to concerns regarding the direction or stability of our business, which may be exploited by our competitors, result in the loss of business opportunities, cause concern to our current or potential customers or suppliers, or make it more difficult to retain existing personnel or attract and retain new personnel. Changes in management or the board could be time-consuming, result in significant additional costs to us and could be disruptive of our operations and divert the time and attention of management and our employees away from our business operations and executing on our strategic plan. The unexpected loss of members of our board of directors or senior management team could be disruptive to our operations, jeopardize our ability to raise additional funding and have an adverse effect on our business. The failure of our directors or any new members of our board of directors or management to perform effectively could have a significant negative impact on our business, financial condition and results of operations.

Disruption, failure, data corruption, cyber-based attacks or security breaches of our IT systems could adversely affect our business and results of operations.

We rely on information technology (“IT”) systems in order to achieve our business objectives, including to transmit and store electronic information, to capture knowledge of our business including vessel operation systems containing information about production, efficiency and vessel positioning, to conduct our accounting, financial and treasury activities, to store historical financial, project and proprietary information, to monitor our vessel maintenance and engine systems, and to communicate within the organization and with customers, suppliers, partners and other third parties. Our portfolio of hardware and software products, solutions and services and our enterprise IT systems may be vulnerable to damage or disruption caused by circumstances beyond our control such as catastrophic events, power outages, natural disasters and computer system or network failures. The Company’s IT systems may also be subject to cybersecurity attacks including malware, other computer viruses or malicious software, spoofing or phishing email attacks, attempts to gain unauthorized access to our data, the unauthorized release, corruption or loss of its data, loss or damage to its data delivery systems and other electronic security breaches. The failure or disruption of our IT systems to perform as anticipated for any reason could disrupt our business and result in decreased performance, significant remediation costs, transaction errors, loss of data, processing inefficiencies, downtime, failure to properly estimate the work or costs associated with projects, litigation and the loss of customers or suppliers. A significant disruption or failure could have a material adverse effect on our business, operating results, cash flows or financial condition.

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Impairments to our goodwill or other intangible assets could negatively affect our financial condition and results of operations.

Under current accounting guidelines, we must assess, at least annually and potentially more frequently, whether the value of our goodwill and other intangible assets have been impaired. Any impairment of goodwill or other intangible assets as a result of such analysis would result in a non-cash charge against earnings, which charge could materially adversely affect our business, operating results or financial condition. We test goodwill annually for impairment in the third quarter of each year, or more frequently should circumstances dictate. A significant and sustained decline in our future cash flows, a significant adverse change in the economic environment, slower growth rates or our stock price falling below our net book value per share for a sustained period could result in the need to perform additional impairment analysis in future periods. If we were to conclude that a future write-down of goodwill or other intangible assets is necessary, then we would be required to record a non-cash charge against earnings, which, in turn, could have a material adverse effect on our business, results of operations or financial condition.

Item 1B. Unresolved Staff Comments.

None.

Item 1C. Cybersecurity.

Our process of assessing, identifying and managing material risks from cybersecurity threats is integrated into our overall enterprise risk management (“ERM”) process. The audit committee of the board of directors (the “Audit Committee”) oversees our ERM framework, including cybersecurity and other information technology risks. This involves collaboration with key personnel, including the Chief Financial Officer (“CFO”), the Chief Technology Officer (“CTO”), IT operational management, and Internal Audit. We also have a cross-functional team led by the CTO, which meets weekly with a fixed agenda to discuss mitigation and action-items related to ERM cyber risk updates, cyber statistics dashboards, and threat vectors. Our CTO has a comprehensive background in various enterprise-wide information technology and cybersecurity leadership roles within the global energy and oil and gas sectors, and strategy consulting. The Audit Committee receives a report from our Director of Internal Audit on the ERM risk register at least three times a year.

The CTO and Chief Legal Officer (“CLO”) are key members of management responsible for strategic cybersecurity leadership. They lead tactical threat assessment, keep an updated risk register and develop and maintain governance and procedures. The CTO reports to the CFO and presents at least annually to the Audit Committee and the full board of directors on cybersecurity processes. The CLO reports to the CEO, and to the Audit Committee and the full board of directors, with regard to significant cybersecurity incidents, as further described below. Our CLO has specific training in cybersecurity awareness and holds a certificate of Cybersecurity Governance for the Board of Directors from the Massachusetts Institute of Technology Sloan School of Management.

To help manage cybersecurity risks, we have implemented a cybersecurity program consisting of security risk assessments, testing, continuous surveillance, dynamic incident response services and business continuity planning. Our cybersecurity program utilizes the guidelines of the National Institute of Standards and Technology Cybersecurity Framework to define material risks and establish controls designed to protect, detect, respond to and recover from cybersecurity incidents. In addition, we engage consultants to assess our resilience against applicable practices and standards for our industry.

We use threat intelligence, vulnerability scanning and security assessments to identify and classify risks and impact. We engage multiple third-party cybersecurity services and experts who collaborate with our internal team to provide a multilayered approach for real-time threat detection across cloud services, networks and endpoints. Our security measures are under continuous scrutiny, with regular enhancements and updates to our policies and operational protocols integrated with a feedback loop from tabletop exercises. Our business continuity and response plan outlines our plans, procedures and policies governing our general information security program. As part of our business continuity plan and security awareness, we conduct tabletop exercises and regular mandatory training for all employees. We have also implemented a cybersecurity enhancement program, focusing on special initiatives which include automating security incident response, including systems that can provide quicker business recovery from multi-geographical locations, strengthening the governance framework, upgrading the hybrid server environment on our vessels and improving wireless communication system resilience. In addition, we have a process in place to manage cybersecurity risks associated with third-party service providers. We are in the process of imposing the new regulatory security requirements upon our suppliers, which will include: maintaining an effective security management program, abiding by information handling and asset management requirements and notifying us in the event of any known or suspected cyber incident.

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The status of our cybersecurity is reported to senior management as needed, and formal incident reports are made for incidents with risk of significant impact to the Company. Such incidents are escalated to our Incident Response Team, led by the Business Continuity Coordinator (“BCC”), which follows our business continuity plan and includes executive summary for management, along with compliance reports to regulators within the required timeframes. The BCC is responsible for providing timely information to the CLO, who reports to the Audit Committee and the full board of directors.

Although we have not experienced any material cybersecurity events to date, new advanced cybersecurity threats and attack vectors could materially affect our business strategy, results of operation or financial condition, as further discussed in the risk factors “Disruption, failure, data corruption, cyber-based attacks or security breaches of our IT systems could adversely affect our business and results of operations” in Part I, Item 1A of this Annual Report on Form 10-K.

Item 2. Properties.

The Company owns or leases the properties described below. The Company believes that its existing facilities are adequate for its operations.

The Company’s headquarters are located at 9811 Katy Freeway, Suites 1000 and 1200, Houston, Texas 77024 with approximately 31,336 square feet of office space that it leases with a term expiring in 2030. As of December 31, 2023, the Company owns or leases the following additional facilities:

Location	Type of Facility	Size			Leased or Owned
Staten Island, NY	Yard		4.4	Acres	Owned
Morgan City, LA	Yard		6.4	Acres	Owned
Norfolk, VA	Yard		15.3	Acres	Owned
Norfolk, VA	Yard		16.2	Acres	Leased
Little Rock, AR	Yard		11.8	Acres	Leased
Cape Girardeau, MO	Office		726	Square feet	Owned
Cape Girardeau, MO	Storage		7,200	Square feet	Owned
Cape Girardeau, MO	Yard		18.4	Acres	Owned
Jacksonville, FL	Office		4,171	Square feet	Leased
Oakbrook Terrace, IL	Office		44,219	Square feet	Leased

Item 3. Legal Proceedings.

For additional discussion of certain litigation involving the Company, see the disclosures under “Legal proceedings and other contingencies” included within Note 12, “Commitments and contingencies,” to the Company’s consolidated financial statements.

Item 4. Mine Safety Disclosures.

Not applicable.

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Part II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information

Our common stock is traded under the symbol “GLDD” on the NASDAQ Global Market.

The graph below shows the cumulative total return to stockholders of the Company’s common stock during a five year period ended December 29, 2023, the last trading day of our 2023 fiscal year, compared with the return on the NASDAQ Composite Index and a group of our peers which we use internally as a benchmark for our performance. The graph assumes initial investments of $100 each on December 31, 2018, in GLDD stock (assuming reinvestment of all dividends paid during the period), the NASDAQ Composite Index and the peer group companies, collectively.

 

	12/31/2018		12/31/2019		12/31/2020		12/31/2021		12/31/2022		12/31/2023
Great Lakes Dredge & Dock Corp	$	100.00	$	171.15	$	198.94	$	237.46	$	89.88	$	116.01
Peer Average (see below)		100.00		113.90		143.93		159.34		168.41		301.90
NASDAQ Composite Index		100.00		135.23		194.24		235.78		157.74		226.24

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The peer group in the graph above is composed of the following member companies:

Company	Ticker
Ameresco	AMRC
Argan, Inc.	AGX
Badger Infrastructure Solutions Ltd.	BADFF
Construction Partners Inc	ROAD
Helix Energy Solutions Group, Inc.	HLX
Helmerich & Payne, Inc.	HP
Hill International, Inc.	HIL
IES Holdings Inc.	IESC
Infrastructure & Energy Alternatives (prior to acquisition by MasTec Inc on October 7, 2022)	IEA
Limbach Holdings, Inc.	LMB
Logistec Corporation	LGT
Matrix Service Company	MTRX
Mistras Group, Inc.	MG
MYR Group Inc.	MYRG
NV5 Global Inc	NVEE
Oceaneering International, Inc.	OII
Orion Group Holdings, Inc.	ORN
Sterling Infrastructure, Inc.	STRL
Team, Inc.	TISI
Tidewater Inc.	TDW

Given the usage of this peer group for compensation purposes and the fact that each peer is a capital-intensive business, the Company deems it appropriate to also use this peer group for showing the comparative cumulative total return to stockholders of Great Lakes.

Holders of Record

As of February 13, 2024, the Company had approximately 17 shareholders of record of the Company’s common stock. A substantial number of holders of the Company’s common stock are “street name” or beneficial holders, whose shares are held of record by banks, brokers and other financial institutions.

Dividends

The Company does not currently pay dividends to its common stockholders. The declaration and payment of future dividends will be at the discretion of Great Lakes’ board of directors and depends on many factors, including general economic and business conditions, the Company’s strategic plans, financial results and condition, legal requirements including restrictions and limitations contained in the Company’s senior credit agreement, bonding agreements and the indenture relating to the senior unsecured notes and other factors the board of directors deems relevant. Accordingly, the Company cannot ensure the size of any such dividend or that the Company will pay any future dividend.

Issuer Purchases of Equity Securities

The Company did not repurchase any shares of its common stock during the quarter ended December 31, 2023.

Item 6. [Reserved]

Not applicable.

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Overview

Great Lakes is the largest provider of dredging services in the United States which is complemented with a long history of performing significant international projects. The Company is also fully engaged in expanding its core business into the rapidly developing offshore wind energy industry. The Company operates in one operating segment, which is also the Company’s one reportable segment and reporting unit.

Dredging generally involves the enhancement or preservation of the navigability of waterways or the protection of shorelines through the removal or replenishment of soil, sand or rock. Domestically, our work generally is performed in coastal waterways and deep water ports. The U.S. dredging market consists of four primary types of work: capital, coastal protection, maintenance and rivers & lakes. Capital dredging consists primarily of port expansion projects, which involve the deepening of channels and berthing basins to allow access by larger, deeper draft ships and the provision of land fill used to expand port facilities. In addition to port work, capital projects also include coastal restoration and land reclamations, trench digging for pipelines, tunnels, and cables and other dredging related to the construction of breakwaters, jetties, canals and other marine structures. Coastal protection projects generally involve moving sand from the ocean floor to shoreline locations where erosion threatens shoreline assets. Maintenance dredging consists of the re-dredging of previously deepened waterways and harbors to remove silt, sand and other accumulated sediments. Due to natural sedimentation, most channels generally require maintenance dredging every one to three years, thus creating a recurring source of dredging work that is typically non-deferrable if optimal commercial navigability is to be maintained. In addition, severe weather such as hurricanes, flooding and droughts can also cause the accumulation of sediments or severe erosion and drive the need for maintenance and coastal protection dredging. Rivers & lakes dredging and related operations typically consist of lake and river dredging, flood control dredging, inland levee and construction dredging, environmental restoration and habitat improvement and other marine construction projects.

The Company’s bid market is defined as the aggregate dollar value of domestic dredging projects on which we bid or could have bid if not for capacity constraints or other considerations (“bid market”). We experienced an average combined bid market share in the U.S. of 33% over the three-year period ended December 31, 2023, including 36%, 56%, 23% and 22% of the domestic capital, coastal protection, maintenance and rivers & lakes sectors, respectively.

The Company’s largest domestic customer is the U.S. Army Corps of Engineers (the “Corps”), which has responsibility for federally funded projects related to navigation and flood control of U.S. waterways. Multi-jurisdictional cost sharing arrangements are allowing the Corps to utilize funds from sources other than the federal budget to prioritize additional projects where waterway infrastructure improvements can have an impact to large regions. Although some of a project’s funding may ultimately be derived from multiple sources, the Corps maintains the authority over the project and is our customer. In 2023, our revenues earned from contracts with federal government agencies were approximately 75% of total revenue, consistent with the average of the three-year period ended December 31, 2023 of 74%.

The Company’s fleet, which includes 17 dredges, 13 material transportation barges, one drillboat, and numerous other support vessels, is the largest and most diverse fleet of any U.S. dredging company. Our fleet of dredging equipment can be utilized on one or many types of work and in various geographic locations. This flexible approach to our fleet utilization, driven by the project scope and equipment, enables us to move equipment in response to changes in demand for dredging services to take advantage of the most attractive opportunities.

The Company’s vessels are subject to periodic regulatory dry dock inspections to verify that the vessels have been maintained in accordance with the rules of the U.S. Coast Guard and the American Bureau of Shipping (“ABS”) and that recommended repairs have been satisfactorily completed. Regulatory dry dock frequency is a statutory requirement mandated by the U.S. Coast Guard and the ABS. The Company’s vessels undergo regulatory dry-docks every two to three years or every five years, depending on the vessel type and may also go into dry dock on an as-needed basis for upgrades, maintenance and/or repairs. During the fourth quarter of 2023, the Company returned to work the vessel that was dry docked for regulatory inspections as of September 30, 2023. The Company experienced regulatory dry dock inspections on four dredges in 2023.

The Company plans to participate in the offshore wind market, and in November 2021, the Company entered into a $197 million contract with Philly Shipyard to build the first U.S. flagged Jones Act compliant, inclined fall-pipe vessel for subsea rock installation for wind turbine foundations, the Acadia, which is expected to be delivered and operational in 2025. This vessel represents a significant critical advancement in building the U.S. logistics infrastructure to support the future of the new U.S. offshore wind industry. Additionally, in July 2023, the Company announced the signing of the first ever subcontract for procurement of rock with Carver Sand & Gravel LLC, a U.S. quarry in the state of New York. Both milestones solidify our entry into the offshore wind market and will support Great Lakes' awarded rock installation contract for Empire Wind I with an estimated installation window in 2025. In

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December 2023, Great Lakes was awarded another rock installation contract to perform subsea rock cable protection, a new utilization for this vessel, on an offshore wind project off the East Coast of the United States. Towards the end of 2023, the Company saw several cancellations of PPA’s that were entered into in 2018 and 2019, as inflation and interest rate hikes eroded the profitability of these PPA’s. This led our clients, Equinor and bp, to terminate our Empire Wind II contract and reset their plan for the related wind farm. Great Lakes may have the opportunity to re-tender this project, if Equinor re-bids their PPA for this development. In 2023, the Company recognized approximately $2.5 million in gross profit for work performed prior to the termination, as well as a $7.4 million gain in other (gains) losses in the consolidated statements of operations associated with the termination of the Empire Wind II contract.

Offshore wind has been recognized around the world as a reliable source of renewable energy. Globally installed offshore wind capacity is targeted to reach about 260 GW by 2030, up from 40 GW in 2020. In 2021, the Biden Administration announced the ambitious goal of 30 GW of U.S. offshore wind by 2030 and provided $3.0 billion in federal loan guarantees for offshore wind projects. The administration’s support for offshore wind culminated in the Inflation Reduction Act, the largest climate mitigation act ever passed by Congress. Though there have been several offshore wind project PPA's cancelled and New York rejected requested adjustments to existing PPA's, the state continues to take steps forward in meeting their renewable energy goals with the announcement on October 24, 2023, of three new project awards with the capacity of approximately 4 GW of offshore wind energy and a new accelerated fourth bid round for additional PPA's was announced for early 2024. Vineyard Wind, the first commercial scale offshore wind farm on the East Coast, recently completed installation of the first offshore wind turbine, which on January 2, 2024, began delivering power to the New England grid. This project expects to have 5 turbines operating at full capacity early in 2024. In addition. South Fork Wind, which will be the first offshore wind farm to supply power to the State of New York, has completed the installation of two of its twelve planned turbines, with one currently operational. In January 2024, the New Jersey Board of Public Utilities selected two projects to deliver 3.7 GW of offshore wind generation. New Jersey now has approximately 5.2 GW contracted, which is significant progress toward its 11 GW goal by 2040. Although the market is facing some short-term challenges, the long-term outlook for offshore wind in the U.S. is optimistic, based on strong fundamentals and commitment by the U.S. to meet its energy independence and de-carbonization targets. Great Lakes has established a unique business position in the U.S. offshore wind market, and we continue to pursue and tender bids, both domestically and internationally, on multiple offshore wind projects for the Acadia, which will be the first and only Jones Act compliant subsea rock installation vessel in the United States.

Contract Revenues

Most of the Company’s contracts are obtained through competitive bidding on terms specified by the party inviting the bid. The types of equipment required to perform the specified service, project site conditions, the estimated project duration, seasonality, location and complexity of a project affect the cost of performing the contract and the price that contractors will bid.

Fixed-price contracts, which comprise substantially all of the Company’s revenue, will most often represent a single performance obligation as the promise to transfer the individual services is not separately identifiable from other promises in the contracts and, therefore, not distinct. We capitalize certain pre-contract and pre-construction costs, and defer recognition over the life of the contract. Our performance obligations are satisfied over time and revenue is recognized using contract fulfillment costs incurred to date compared to total estimated costs at completion, also known as cost-to-cost, to measure progress towards completion. Contract modifications are changes in the scope or price (or both) of a contract that are approved by the parties to the contract. We recognize a contract modification when the parties to a contract approve a modification that either creates new, or changes existing, enforceable rights and obligations of the parties to the contract. Contract modifications are included in the transaction price only if it is probable that the modification estimate will not result in a significant reversal of revenue. Revisions in estimated gross profit percentages are recorded in the period during which the change in circumstances is experienced or becomes known. As the duration of most of our contracts are one year or less, the cumulative net impact of these revisions in estimates, individually and in the aggregate across our projects, does not significantly affect our results across annual reporting periods. Provisions for estimated losses on contracts in progress are made in the period in which such losses are determined.

Costs and Expenses

The components of costs of contract revenues include labor, equipment (including depreciation, maintenance, insurance and long-term rentals), subcontracts, fuel, supplies, short-term rentals and project overhead. Hourly labor generally is hired on a project-by-project basis. The Company is a party to numerous collective bargaining agreements in the U.S. that govern our relationships with our unionized hourly workforce.

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Primary Factors that Determine Operating Profitability

The Company’s results of operations for a calendar or quarterly period are generally determined by the following three factors:

•Bid wins and dredge employment— The Company recognizes backlog upon a project being awarded. We begin to recognize revenues when a dredging contract commences a major activity on the project. The period prior to the commencement of a major activity for dredging projects can range from 45 days to six months depending on the complexity of the project and environmental work windows. Although our dredging fleet is subject to downtime for scheduled periodic maintenance and regulatory dry dockings, we seek to maximize our revenues by employing our dredging fleet on a full-time basis. If a dredge is idle (i.e., the dredge is not employed on a dredging project or undergoing scheduled periodic maintenance and repair), we do not earn revenue with respect to that dredge during the time period for which it is idle.

•Project and dredge mix — The Company’s domestic dredging projects generally involve capital, maintenance, coastal protection and rivers & lakes work, while our foreign dredging projects generally involve capital work. In addition, our projects vary in duration which is generally driven by the type of work undertaken. In general, projects of longer duration result in less dredge downtime in a given period. For example, capital deepening projects generally span several years due to their complexity and environmental windows. Moreover, our dredges have different physical performance capabilities and typically work on certain types of dredging projects. Accordingly, our dredges have different daily revenue generating capacities.

We generally expect to achieve different levels of gross profit margin (i.e., gross profit divided by revenues) for work performed on the different types of dredging projects and for work performed by different types of dredges. Our expected gross margin for a project is based upon our estimates at the time of the bid. Although we seek to bid on and win projects that will maximize our gross margin, we cannot control the type of dredging projects that are available for bid from time to time, the type of dredge that is needed to complete these projects, the competitive landscape at the time of bid or the time schedule upon which these projects are required to be completed. As a result, in some quarters the Company works on a mix of dredging projects that, in the aggregate, have relatively high expected gross margins (based on project type and dredges employed) and in other quarters, we work on a mix of dredging projects that, in the aggregate, have relatively low expected gross margins (based on project type and dredges employed).

•Project execution—The Company seeks to execute all of our projects consistent with or at a higher production than our as-bid project estimates. In general, our ability to achieve our project estimates depends upon many factors including soil conditions, weather, variances from estimated project conditions, equipment mobilization time periods, unplanned equipment downtime or other events or circumstances beyond our control. If we experience any of these events and circumstances, the completion of a project will often be accelerated or delayed, as applicable, and, consequently, we will experience project results that are better or worse than our estimates. We do our best to estimate for events and circumstances that are not within our control; however, these situations are inherent in dredging.

Critical Accounting Policies and Estimates

The Company’s significant accounting policies are discussed in the Notes to the consolidated financial statements included in Item 15 of this Annual Report on Form 10-K. The application of certain of these policies requires significant judgments or an estimation process that can affect our results of operations, financial position and cash flows, as well as the related footnote disclosures. We base our estimates on historical experience and other assumptions that we believe are reasonable. If actual amounts are ultimately different from previous estimates, the revisions are included in our results of operations for the period in which the actual amounts become known. The following accounting policies comprise those that management believes are the most critical to aid in fully understanding and evaluating our reported financial results.

Cost-to-cost method of revenue recognition— Revenue is recognized using contract fulfillment costs incurred to date compared to total estimated costs at completion, also known as cost-to-cost, to measure progress towards completion. Additionally, we capitalize certain pre-contract and pre-construction costs, and defer recognition over the life of the contract. In preparing estimates, we draw on our extensive experience in the dredging businesses. We use this experience in conjunction with the project specifications to select equipment and to design a production technique for a project. We also utilize our database of historical dredging information which includes daily costs, mobilization and dredge production references on the same or similar projects to ensure that our estimates are as accurate as possible, given current circumstances. The daily costs and project duration are significant factors in our cost estimates to complete the project. Weather events, mechanical delays or other unplanned downtime instances may cause the actual costs to complete the project to differ from these estimates.

Contract modifications are changes in the scope or price (or both) of a contract that are approved by the parties to the contract. We recognize a contract modification when the parties to a contract approve a modification that either creates new, or changes

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existing, enforceable rights and obligations of the parties to the contract. Contract modifications are included in the transaction price only if it is probable that the modification estimate will not result in a significant reversal of revenue. Contract modifications are routine in the performance of the Company’s contracts. In most instances, contract modifications are for services that are not distinct, and, therefore, are accounted for as part of the existing contract. Revisions in estimated gross profit percentages are recorded in the period during which the change in circumstances is experienced or becomes known. As the duration of most of the Company’s contracts is one year or less, the cumulative net impact of these revisions in estimates, individually and in the aggregate across projects, does not significantly affect results across annual reporting periods. Provisions for estimated losses on contracts in progress are made in the period in which such losses are determined.

Impairment of goodwill—Goodwill is tested for impairment at the reporting unit level on an annual basis and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying value. The Company believes that this estimate is a critical accounting estimate because: (i) goodwill is a material asset and (ii) the impact of an impairment could be material to the consolidated balance sheet and consolidated statement of operations. We perform our annual impairment test as of July 1 each year.

When conducting the annual impairment test for goodwill, the Company can choose to assess qualitative factors to determine whether it is more likely than not the fair value of the reporting unit is below its carrying value. Qualitative factors considered include macroeconomic, industry and market environments, overall financial performance and market indications of value. If a qualitative assessment determines an impairment is more likely than not, the Company is required to perform a quantitative impairment test. Otherwise, no further analysis is required. The Company also may elect to forego this step and just perform the quantitative impairment test.

When performing a quantitative impairment test, the Company assesses the fair values of its reporting unit using both an income-based approach and a market-based approach. Under the income approach, the fair value of the reporting unit is based on the present value of estimated future cash flows. The income approach is dependent on a number of factors, including estimates of expected future revenue, profitability and capital expenditures related to our new build program, future market growth trends, forecasted revenues and expenses, working capital assumptions, appropriate discount rates and other variables. The market approach measures the value of a reporting unit through comparison to comparable companies. Under the market approach, the Company uses the guideline public company method by applying estimated market-based enterprise value multiples to the reporting unit’s estimated trailing and forward Adjusted EBITDA. The Company analyzes companies that performed similar services or are considered peers. Due to the fact that there are no public companies that are direct competitors, the Company weighs the results of this approach less than the income approach.

In the current year, the Company performed a quantitative goodwill impairment test. The Company performed its annual test of impairment as of July 1, 2023 with no indication of impairment as of the test date. When performing the quantitative test, the Company assessed the fair values of its reporting unit using both a market-based approach and an income-based approach. The assessment used estimates based on assumptions that the Company believes to be reasonable, but such assumptions are subject to unpredictability and uncertainty. Likewise, changes in terminal value and discount rate assumptions, unfavorable economic environment or market conditions and other factors in the future may cause a different assessment. Changes in these estimates and assumptions could materially affect the determination of fair value, and may result in the impairment of goodwill in the event that actual results differ from those estimates. As of the test date, the fair value of the reporting unit was in excess of its carrying value by at least 10%. The Company will continue to monitor for changes in facts or circumstances that may impact our estimates. The Company will perform its next scheduled annual test of goodwill in the third quarter of 2024 should no triggering events occur which would require a test prior to the next annual test. At December 31, 2023 and 2022, our goodwill was $76.6 million.

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Results of Operations—Fiscal Years Ended December 31, 2023, 2022 and 2021

The following table sets forth the components of net income (loss) from continuing operations and Adjusted EBITDA, as defined below, as a percentage of contract revenues for the years ended December 31 2023, 2022 and 2021. The selected financial data presented below have been derived from the Company’s consolidated financial statements; items may not sum due to rounding.

	2023				2022				2021
Contract revenues		100.0		%		100.0		%		100.0		%
Costs of contract revenues		(86.8	)			(95.2	)			(80.0	)
Gross profit		13.2				4.8				20.0
General and administrative expenses		(9.7	)			(7.9	)			(8.6	)
Other (Gains) losses		(1.3	)			1.2				—
Operating income (loss)		4.8				(4.3	)			11.4
Interest expense—net		(2.1	)			(2.2	)			(3.0	)
Other income (expense)		0.4				(0.2	)			0.1
Income (loss) before income taxes		3.1				(6.7	)			8.5
Income tax (provision) benefit		(0.7	)			1.4				(1.8	)
Net income (loss)		2.4				(5.3	)			6.7
Adjusted EBITDA		12.4		%		2.6		%		17.6		%

Adjusted EBITDA, as provided herein, represents net income (loss) from continuing operations of Great Lakes Dredge & Dock Corporation, adjusted for net interest expense, income taxes, depreciation and amortization expense, debt extinguishment, accelerated maintenance expense for new international deployments, goodwill or asset impairments and gains on bargain purchase acquisitions. Adjusted EBITDA from continuing operations is not a measure derived in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Company presents Adjusted EBITDA as an additional measure by which to evaluate our operating trends. We believe that Adjusted EBITDA is a measure frequently used to evaluate performance of companies with substantial leverage and that our primary stakeholders (i.e., its stockholders, bondholders and banks) use Adjusted EBITDA to evaluate our period to period performance. Additionally, management believes that Adjusted EBITDA provides a transparent measure of our recurring operating performance and allows management to readily view operating trends, perform analytical comparisons and identify strategies to improve operating performance. For this reason, we use a measure based upon Adjusted EBITDA to assess performance for purposes of determining compensation under our incentive plan. Adjusted EBITDA should not be considered an alternative to, or more meaningful than, amounts determined in accordance with GAAP including: (a) operating income as an indicator of operating performance; or (b) cash flows from operations as a measure of liquidity. As such, the Company’s use of Adjusted EBITDA, instead of a GAAP measure, has limitations as an analytical tool, including the inability to determine profitability or liquidity due to the exclusion of accelerated maintenance expense for new international deployments, goodwill or asset impairments, gains on bargain purchase acquisitions, net interest expense and income tax expense and the associated significant cash requirements and the exclusion of depreciation and amortization, which represent significant and unavoidable operating costs given the level of indebtedness and capital expenditures needed to maintain our business. For these reasons, we use operating income to measure our operating performance and use Adjusted EBITDA only as a supplement. The following is a reconciliation of Adjusted EBITDA to net income (loss) from continuing operations of Great Lakes Dredge & Dock Corporation (in thousands):

	Year Ended December 31,
	2023		2022			2021
Net income (loss)	$	13,906	$	(34,055	)	$	49,432
Adjusted for:
Interest expense—net		12,140		14,108			21,601
Income tax provision (benefit)		4,406		(9,360	)		13,391
Depreciation expense		42,525		46,273			43,016
Adjusted EBITDA	$	72,977	$	16,966		$	127,440

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Components of Contract Revenues

The following table sets forth, by type of work, the Company’s contract revenues for the years ended December 31, (in thousands):

Revenues	2023		2022		2021
Dredging:
Capital—U.S.	$	186,715	$	342,461	$	397,034
Capital—foreign		—		149		6,596
Coastal protection		196,343		192,567		169,678
Maintenance		187,586		98,077		132,551
Rivers & lakes		16,318		15,527		20,290
Total dredging revenues	$	586,962	$	648,781	$	726,149
Offshore Wind		2,663		—		—
Total revenues	$	589,625	$	648,781	$	726,149

Year Ended December 31, 2023 Compared to Year Ended December 31, 2022

Total revenue was $589.6 million in 2023, a decrease of $59.2 million, or 9.1%, from 2022 total revenue of $648.8 million. The decrease in revenues from the prior year was largely attributable to a decrease in domestic capital project revenues. This decrease was partially offset by an increase in domestic maintenance and coastal protection project revenues during the current year as compared to the prior year. The Company categorizes revenue by service type to understand the market in which we operate and to assess how we are performing on bidding work or projects and are generating revenue from backlog.

Domestic capital dredging revenues decreased $155.8 million, or 45.5%, to $186.7 million in 2023 when compared to 2022 revenues of $342.5 million. The decrease in domestic capital dredging revenue from the prior year was primarily driven by lower revenue earned on projects in Massachusetts, Florida, South Carolina, Texas, New Hampshire, Alabama, New York
and New Jersey. This decrease was partially offset by an increase in revenue earned in Virginia. For the year ended December 31, 2023, we earned approximately 85% of our December 31, 2022 domestic capital dredging backlog.

We did not earn revenues from foreign dredging operations in 2023. Revenues from foreign dredging operations in 2022 were $0.1 million. In 2022, we moved out of foreign operations to focus on domestic projects and do not anticipate any foreign capital project revenue in the immediate future.

Coastal protection revenues were $196.3 million in 2023, an increase of $3.7 million, or 1.9%, from $192.6 million in 2022. The increase in coastal protection revenue for the year ended December 31, 2023 was mostly attributable to higher revenue earned on projects in New York and New Jersey, partially offset by less revenue earned on projects in North Carolina in the current year when compared to the prior year. For the year ended December 31, 2023, we earned approximately 64% of our December 31, 2022 coastal protection backlog.

Revenues from maintenance dredging projects in 2023 were $187.6 million, an increase of $89.5 million, or 91.3%, from $98.1 million in 2022. The increase in maintenance revenue during the current year was mostly attributable to higher revenue earned on projects in Florida, North Carolina, Alabama, Texas, Mississippi and Puerto Rico in the current year compared to the prior year. This increase was partially offset by decreased revenue earned on projects in Louisiana in the current year. For the year ended December 31, 2023, we earned approximately 95% of our December 31, 2022 maintenance dredging backlog.

Rivers & lakes revenues were $16.3 million for 2023, an increase of $0.8 million, or 5.2%, from $15.5 million in 2022. The increase in rivers & lakes revenue during the current year was mostly attributable to higher revenue earned on projects in Arkansas, partially offset by decreased revenue earned on projects in Mississippi in the current year compared to the prior year. For the year ended December 31, 2023, we earned 100% of our December 31 2022 rivers & lakes backlog.

Consolidated gross profit for the year ended December 31, 2023 increased by $46.5 million, or 149.2%, to $77.7 million from $31.2 million for the year ended December 31, 2022. Gross profit margin (gross profit divided by revenue) for the full year 2023 increased to 13.2%, compared to the prior year's gross profit margin of 4.8%. The higher gross profit for 2023 was primarily driven by operating costs that were significantly lower due to the Company's continued focus on cost reduction, as well as improved project performance and fewer drydocking days for our higher margin generating hopper dredges in the current year. Additionally, in comparison to the prior year, the Company experienced fewer supply chain delays that impacted drydockings and an easing of increasing inflation and its negative impacts on the cost of labor, cost of fuel, operating supplies, subcontractor pricing and drydockings.

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General and administrative expenses totaled $57.1 million for the year ended December 31, 2023, up from $51.1 million for the year ended December 31, 2022. The increase was mainly attributable to higher incentive pay and profit sharing due to the increased earnings as well as increased severance pay. In addition, 2023 expenses included higher office rent due to the expansion of the Company’s Houston headquarters, offset partially by lower consulting and recruiting expense.

Other gains and losses for the year ended December 31, 2023 was a gain of $7.5 million, as compared to a loss of $7.8 million for the year ended December 31, 2022. In 2023, the Company recognized a $7.4 million gain associated with the termination of the Empire Wind II contract as well as $0.1 million in gains on disposals of assets. In 2022, the Company recorded an $8.2 million loss related to the retirement of an asset which was classified as held for sale at December 31, 2022. This amount was offset by gains on disposals of assets during 2022 of $0.4 million.

Operating income was $28.2 million and operating loss was $27.7 million for the years ended December 31, 2023 and 2022, respectively. The increase in operating income during the year ended December 31, 2023 was a result of higher gross profit and an increase in other gains and losses. This is partially offset by an increase in general and administrative expenses, as described above.

The Company’s net interest expense for 2023 totaled $12.1 million compared to $14.1 million in 2022. The decrease in net interest expense was primarily due to an increase in capitalized interest related to financing the Company’s new build program, partially offset by an increase in interest due to increased borrowings under the Company’s revolving credit facility.

Income tax provision in 2023 was $4.4 million, compared to an income tax benefit of $9.4 million in 2022. The increased expense was due to the increase in pretax net income. The effective tax rate for the year ended December 31, 2023 was 24.1% compared to 21.3% for the year ended December 31, 2022.

For the year ended December 31, 2023, net income was $13.9 million compared to a net loss of $34.1 million for the year ended December 31, 2022. The increase in net income of $48.0 million, or 140.8% from 2022, was driven by a substantial increase in gross profit and an increase in other gains and losses, as described above. The increase was partially offset by a $13.8 million increase in the income tax provision and a $5.9 million increase to general and administrative expenses during the current year when compared to the prior year.

Adjusted EBITDA (as defined and reconciled on page 37) was $73.0 million and $17.0 million for the years ended December 31, 2023 and 2022, respectively. The increase in Adjusted EBITDA of $56.0 million, or 329.4% from 2022 was attributable to higher gross profit, excluding depreciation, and higher other income partially offset by an increase in general and administrative expenses.

Year Ended December 31, 2022 Compared to Year Ended December 31, 2021

For a discussion comparing our consolidated operating results from the year ended December 31, 2022 with the year ended December 31, 2021, refer to Part II, Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operation – Year Ended December 31, 2022 Compared to Year Ended December 31, 2021” in our Annual Report on Form 10-K for the year ended December 31, 2022, which was filed with the Commission on February 17, 2023.

Bidding Activity and Backlog

The following table sets forth, by type of work, the Company’s backlog as of the dates indicated (in thousands):

	December 31,		December 31,		December 31,
Dredging backlog	2023		2022		2021
Capital—U.S.	$	741,839	$	148,429	$	398,748
Coastal protection		138,394		97,819		99,048
Maintenance		152,104		125,671		50,966
Rivers & lakes		6,765		5,221		2,826
Total dredging backlog	$	1,039,102	$	377,140	$	551,588

Total dredging backlog does not include $44.6 million of performance obligations related to offshore wind contracts or $179.4 million of domestic low bids pending formal award and additional phases (“options”) pending on projects currently in dredging backlog at December 31, 2023. The Company expects to perform on its offshore wind contracts using the inclined fall-pipe vessel for subsea rock installation, which is expected to be delivered and operational in 2025.

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The Company’s contract backlog represents our estimate of the revenues that will be realized under the portion of the contracts remaining to be performed. These estimates are based primarily upon the time and costs required to mobilize the necessary assets to and from the project site, the amount and type of material to be dredged and the expected production capabilities of the equipment performing the work. However, these estimates are necessarily subject to variances based upon actual circumstances. Because of these factors, as well as factors affecting the time required to complete each job, backlog is not always indicative of future revenues or profitability. Also, 34% of our December 31, 2023 dredging backlog relates to federal government contracts, which can be canceled at any time without penalty to the government, subject to our contractual right to recover our actual committed costs and profit on work performed up to the date of cancellation. Our backlog may fluctuate significantly from quarter to quarter based upon the type and size of the projects we are awarded from the bid market. A quarterly increase or decrease of our backlog does not necessarily result in an improvement or a deterioration of our business. Our backlog includes only those projects for which we have obtained a signed contract with the customer.

Approximately 60% of the Company’s dredging backlog at December 31, 2023 is expected to be completed and converted to revenue in 2024. This amount may fluctuate as vessel schedules are adjusted in the future.

The 2023 domestic dredging bid market, excluding LNG projects, totaled $2.22 billion, an increase of $247 million, or 12.5%, compared to the 2022 bid market total of $1.97 billion. Total domestic dredging bid market for the current year period included awards for eleven domestic capital projects in Florida, Virginia, New Jersey, Alabama and Texas, eighteen coastal protection projects in Florida, Pennsylvania, Alabama, New York, New Jersey, North Carolina, Virginia, Louisiana and Delaware, forty six maintenance projects in Texas, Louisiana, Delaware, Florida, South Carolina, Alabama, Massachusetts, Maryland, New York, Georgia and Pennsylvania, and eleven rivers & lakes projects in Louisiana, Mississippi, North Carolina and Texas. The Company won 34% of the overall 2023 domestic bid market, up from a 26% win rate of the overall 2022 domestic bid market and consistent with the win rate of 33% over the three year period ended December 31, 2023. Variability in contract wins from period to period is not unusual. We believe trends in our win rate over the prior three-year periods provide a historical background against which current year results can be compared.

The Company’s December 31, 2023 contracted dredging backlog was $1.04 billion. This represents an increase of $662.0 million, or 175.5%, over our December 31, 2022 backlog of $377.1 million. Total dredging backlog at the end of 2023 does not reflect approximately $44.6 million of performance obligations related to offshore wind contracts or approximately $179.4 million of domestic low bids pending formal award and additional phases (“options”) pending on projects currently in dredging backlog. At December 31, 2022, the amount of domestic low bids pending award was $584.7 million. Included in the December 31, 2023 backlog are two LNG projects, including the Rio Grande LNG project, which will be the largest project undertaken in the Company's history, and the Port Arthur LNG Phase 1 project for Marine Dredging and Disposal. Subcontractor work on the Rio Grande LNG project began in January 2024.

At the end of 2022, the Water Resources Development Act (“WRDA”) of 2022 (“WRDA 2022”), was approved by Congress and signed into law by the President. WRDA 2022 is on a two-year renewal cycle and includes legislation that authorizes the financing of Corps' projects for flood and hurricane protection, dredging, ecosystem restoration and other construction projects. WRDA 2022 featured among many other things authorization for New York and New Jersey shipping channels to be deepened to 55 feet, projects which are estimated to be approximately $6 billion, as well as the Coastal Texas Program, estimated at $34.4 billion, which includes dune and marsh restoration to safeguard the Texas Gulf Coast from hurricane surges. In addition, this legislation includes policy changes that will allow future port, waterways, and coastal projects to be more readily approved and funded.

In March 2023, President Biden released the President’s Fiscal Year 2024 executive budget. The proposed amount for the Corps targets $7.4 billion, which is a record amount for a President's budget. In June 2023, the House proposed an increased 2024 budget of $9.6 billion for the Corps, which is $910 million above fiscal year 2023 and includes $2.8 billion for the Harbor Maintenance Trust Fund (“HMTF”) and $1.5 billion for flood and storm damage reduction. In July 2023, the Senate Committee on Appropriations passed the budget which targets $8.9 billion for the Corps. This will move to the Senate floor for further deliberation and consideration. This proposed budget is expected to provide for a strong 2024 bid market. Currently, the government is operating under a continuing resolution until the budget is approved.

The Company won 36%, or $241.8 million, of the domestic capital dredging projects awarded in 2023, excluding LNG, compared to 8%, or $63.8 million, in the prior year. Domestic capital dredging work made up $741.8 million, or 71%, of our December 31, 2023 contracted dredging backlog. During 2023, the Company earned revenue from deepening projects in Texas, Virginia and Louisiana, which were in dredging backlog at December 31, 2022. We expect approximately 50% of our domestic capital dredging backlog at December 31, 2023 to be performed in 2024, with the remainder performed in 2025 and 2026. We continue to see strong support from the current presidential administration and Congress for the dredging industry. Government funded projects coming into the pipeline include Sabine, Mobile and Houston. These deepenings continue the trend of ensuring all East Coast and Gulf of Mexico ports will be able to accommodate the deeper draft vessels currently used on several trade routes. In addition, multiple

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project phases for port deepenings in Norfolk and the Houston ship channel are expected to continue for the next several years. The nation’s governors continue to show commitment to their respective ports through engagement and funding. Finally, Congress has also shown a commitment to ports and waterways, providing record annual budgets for the Corps for port deepening and channel maintenance. In addition to this port work, a greater amount of coastal restoration and rehabilitation projects are being funded in the Gulf Coast region as the states utilize available monies for ecosystem priorities, a portion of which is allocated to dredging.

The Company won 52%, or $213.8 million, of the coastal protection projects awarded in 2023, compared to 57%, or $204.0 million, in the prior year. During 2023, the Company was awarded seven coastal protection projects in North Carolina, New York, New Jersey and Florida. We have contracted dredging backlog related to coastal protection of $138.4 million at December 31, 2023 compared to $97.8 million at the end of 2022. During the year ended December 31, 2023, the Company continued to earn revenue on coastal protection projects in North Carolina, Florida, New York and New Jersey which were in dredging backlog at December 31, 2022. We expect substantially all of our coastal protection dredging backlog at December 31, 2023 to be performed in 2024. Coastal protection and storm impacts continue to provide the major impetus for coastal project investment at federal and state levels. Strong hurricane and storm seasons have resulted in an increase in beach erosion and other damage which adds to the recurring nature of our business and the need for more frequent coastal protection and port maintenance projects. As a result of the extreme storm systems in prior years involving Hurricanes Harvey, Irma, and Maria, the U.S. Congress passed supplemental appropriations for disaster relief and recovery which includes $17.4 billion for the Corps to fund projects that will reduce the risk of future damage from flood and storm events. The Corps is beginning to provide visibility on its plans for this money, and it is expected that approximately $1.8 billion will be allocated to dredging-related work. Most of this work is anticipated to be coastal protection related, but some funding may be provided for channel maintenance. This increased budget and additional funding support our expectation for a stronger market in 2024.

The Company won 30%, or $292.8 million, of the maintenance dredging projects awarded in 2023 compared to 26%, or $191.4 million, in 2022. During 2023 the Company was awarded multiple maintenance projects including a maintenance project in Puerto Rico totaling $93.1 million, as well as projects in Texas, Louisiana, New York and Florida. During the year ended December 31, 2023, the Company continued to earn revenue on projects in Florida, Louisiana, Mississippi and North and South Carolina which were in dredging backlog at December 31, 2022. Our contracted maintenance dredging backlog at December 31, 2023 of $152.1 million is $26.4 million higher than the backlog of $125.7 million at December 31, 2022. We expect substantially all of our maintenance dredging backlog at December 31, 2023 to be performed in 2024. Past WRDA bills called for full use of the HMTF for its intended purpose of maintaining future access to the waterways and ports that support our nation’s economy. On March 27, 2020, the U.S. government enacted the CARES Act which includes a provision that lifts caps on the HMTF, thereby allowing full access to future annual revenues. Through the increased appropriation of HMTF monies, the Company has seen increased funding for harbor maintenance projects to be let for bid throughout 2023 and expects this trend to continue in 2024.

The Company did not win any of the rivers & lakes projects awarded in the markets where the group operates during the current year, compared to 48%, or $59.1 million, in 2022. We have contracted dredging backlog related to rivers & lakes of $6.8 million at December 31, 2023, which is $1.5 million higher than the backlog of $5.2 million at December 31, 2022. The increase in our backlog for 2023 relates to the exercise of options that were previously pending on existing projects as of December 31, 2022. We expect substantially all of our rivers & lakes dredging backlog at December 31, 2023 to be performed in 2024.

Liquidity and Capital Resources

The Company’s principal sources of liquidity are net cash flows provided by operating activities, availability under our revolving credit facility and proceeds from issuances of long-term debt. See Note 6, “Long-term debt,” to our consolidated financial statements included in Item 15 of this Annual Report on Form 10-K. Our principal uses of cash are to meet debt service requirements, finance capital expenditures, and provide working capital and other general corporate purposes.

The Company’s net cash provided by operating activities for the years ended December 31, 2023, 2022 and 2021 totaled $47.4 million, $1.7 million and $49.0 million, respectively. Normal increases or decreases in the level of working capital relative to the level of operational activity impact cash flow from operating activities. The increase in cash provided by operating activities during 2023 compared to the same period in the prior year was driven by a increases in net income and billings in excess of contract revenues offset by an increase in accounts receivable during the current year when compared to the same period in the prior year. Cash provided by operating activities for the year ended December 31, 2022 was down compared to 2021 due to lower net income and higher working capital during 2021.

The Company’s net cash flows used in investing activities for the years ended December 31, 2023, 2022 and 2021 totaled $120.1 million, $140.9 million and $112.2 million, respectively. Investing activities in all periods primarily relate to normal course upgrades and capital maintenance of our dredging fleet. The Company took delivery of a 6,500 cubic yard trailing suction hopper dredge, the Galveston Island, which began operations in February 2024. Additionally, in June 2022 the Company exercised the

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contract option with the same builder to build a second 6,500 cubic yard trailing suction hopper dredge, the Amelia Island, with expected delivery in 2025. The delivery of the new Galveston Island and Amelia Island hopper dredges will provide the Company with added capacity and the opportunity to potentially retire older dredges. In November 2021, the Company entered into a $197 million contract with Philly Shipyard to build the Acadia, the first U.S. flagged Jones Act compliant, inclined fall-pipe vessel for subsea rock installation for wind turbine foundations to support the new U.S. offshore wind industry which is expected to be delivered and operational in 2025. In 2021, the Company began building three 7,100 cubic yard dump scow barges, and in July 2021, the Company announced a contract to build two multifunctional all-purpose vessels (“Multi Cats”). During the year ended December 31, 2023, the Company invested $24.8 million and $36.3 million in the new hopper dredges Galveston Island and Amelia Island, respectively, $9.2 million in Multi Cats and scows and $64.5 million in the rock installation vessel, the Acadia. The Company anticipates that remaining new build program payments will be made with cash on hand, future cash flows generated from operations, revolver availability, and possible future financing transactions. In 2023, 2022 and 2021, we received $30.7 million, $2.1 million and $4.5 million, respectively, in proceeds from dispositions of property and equipment.

The Company’s net cash flows provided by financing activities for the year ended December 31, 2023 totaled $89.9 million. The Company’s net cash flows used in financing activities for the years ended December 31, 2022 and 2021 totaled, $1.7 million and $5.9 million, respectively. The increase in cash provided by financing activities primarily relates to $208.0 million of revolving debt facility borrowings, partially offset by $118.0 million of revolving debt facility repayments.

The Company expects to spend between approximately $170 million and $195 million on capital expenditures in 2024 which is comprised of vessels in our new build program and maintenance capital expenditures. In January 2023, the Company applied with the Maritime Administration (“MARAD”), which is a unit of the U.S. Department of Transportation, for Title XI financing. If approved, we could borrow a portion of the acquisition cost of the subsea rock installation vessel with repayment terms of up to 25 years at rates tied to U.S. Treasury rates. MARAD announced in 2022 that they want to facilitate more offshore wind construction and have designated vessels like our subsea rock installation ship, “Vessels of National Interest” which will prioritize our application for review and funding through Title XI. The recent offshore wind developments, including the canceled PPAs discussed herein, have slowed down the progress of our Title XI application. While the Company continues its conversations with MARAD, it has shifted focus and is actively pursuing other financing that can either be a bridge to a Title XI loan or the primary funding source to complete the new build program. The Company anticipates that remaining new build program payments will be made with cash on hand, future cash flows generated from operations, revolver availability and potential new sources of financing.

The availability of additional financing will depend on a variety of factors such as market conditions, the general availability of credit, the volume of trading activities, our credit ratings and credit capacity, as well as the possibility that customers or lenders could develop a negative perception of our long- or short-term financial prospects if the level of our business activity decreased due to a market downturn. If internal sources of liquidity prove to be insufficient, we may not be able to successfully obtain additional financing on favorable terms, or at all. In March 2023, S&P Global Ratings (“S&P”) downgraded our corporate credit rating to CCC+ with a negative outlook from B with a stable outlook, and Moody’s Investor Services (“Moody’s”) downgraded our corporate credit rating to B3 with a negative outlook from B2 with a stable outlook. These credit ratings are below investment grade and could raise our cost of financing. As a consequence, we may not be able to issue additional debt in amounts and/or with terms that we consider to be reasonable. One or more of these occurrences could limit our ability to pursue other business opportunities.

Commitments, contingencies and liquidity matters

Refer to Note 6, “Long-term debt,” in the Company’s consolidated financial statements for discussion of the Company’s Amended Credit Agreement and Senior Notes. Refer to Note 4, “Leases,” in the Company’s consolidated financial statements for discussion of the Company’s leases. Additionally, refer to Note 12, “Commitments and contingencies,” in the consolidated financial statements for discussion of the Company’s surety agreements.

Other

The future declaration and payment of dividends will be at the discretion of the Company’s board of directors and will depend on many factors, including general economic and business conditions, our strategic plans, our financial results and condition and legal requirements, including restrictions and limitations contained in the Amended Credit Agreement, surety bonding agreement and the indenture relating to our senior notes. Accordingly, we cannot make any assurances as to the size of any such dividend or that it will pay any such dividend in future quarters.

The Company believes our cash and cash equivalents, our anticipated cash flows from operations and availability under our revolving credit facility will be sufficient to fund our operations, capital expenditures and the scheduled debt service requirements for the next twelve months. Beyond the next twelve months, our ability to fund our working capital needs, planned capital expenditures, scheduled debt payments and dividends, if any, and to comply with all the financial terms and covenants required under the Amended

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Credit Agreement, depends on our future operating performance and cash flows, which in turn are subject to prevailing economic conditions and to financial, business and other factors, some of which are beyond our control.

Contractual Obligations

Additional information related to contractual obligations can be found within this Item 7 in our “Liquidity and Capital Resources” section and also in Note 6, “Long-term debt,” and Note 4, “Leases” and Note 12, “Commitments and contingencies,” to our consolidated financial statements.

Other Off-Balance Sheet and Contingent Obligations

The Company had outstanding letters of credit relating to contract guarantees and insurance payment liabilities totaling $49.8 million at December 31, 2023. We have granted liens on a substantial portion of the owned operating equipment as security for borrowings under the Amended Credit Agreement and other indebtedness.

At December 31, 2023, the Company had outstanding performance bonds with a notional amount of $960.9 million. The revenue value remaining in backlog related to the projects totaled $546.8 million.

Certain foreign projects performed by the Company have warranty periods, typically spanning no more than one to three years beyond project completion, whereby we retain responsibility to maintain the project site to certain specifications during the warranty period. Generally, any potential liability of the Company is mitigated by insurance, shared responsibilities with consortium partners, and/or recourse to owner-provided specifications.

The Company considers it unlikely that it would have to perform under any of its contingent obligations.

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Item 7A. Quantitative and Qualitative Disclosures about Market Risk.

In May 2021, the Company sold $325 million of unsecured 5.25% Senior Notes due June 1, 2029 pursuant to a private offering. The Company used the net proceeds from the offering, together with cash on hand, to redeem all $325.0 million aggregate principal amount of its prior outstanding 8% Notes. The 2029 Notes were priced to investors at par and will mature on June 1, 2029. At December 31, 2023, the Company had long-term senior notes outstanding with a recorded face value of $325.0 million. The fair value of these existing notes, which bear interest at a fixed rate of 5.25%, was $276.3 million at December 31, 2023 based on market prices. Assuming a 10% decrease in interest rates from the rates at December 31, 2023 the fair value of this fixed rate debt would have increased to $287.1 million.

We are exposed to market risks related to fluctuations in interest rates on our outstanding variable rate indebtedness. As of December 31, 2023 we had $90.0 million of variable rate indebtedness. All of the outstanding borrowings under the revolving credit facility are at variable rates based on the Secured Overnight Financing Rate (“SOFR”). At December 31, 2023 our weighted average interest rate was 6.71%. A hypothetical 10% increase in the weighted average interest rate on our variable rate indebtedness as of December 31, 2023 would increase our annual interest cost by approximately $0.6 million.

A significant operating cost for the Company is diesel fuel, which represents approximately 12% of our costs of contract revenues. We use fuel commodity forward contracts, typically with durations of less than one year, to reduce the impacts of changing fuel prices on operations. We do not purchase fuel hedges for trading purposes. Based on our 2024 projected domestic fuel consumption, an approximate 10% increase in the average price per gallon of fuel would have a $0.5 million effect on fuel expense, after the effect of fuel commodity contracts in place at December 31, 2023. At December 31, 2023 we had outstanding arrangements to hedge the price of a portion of our fuel purchases related to domestic dredging work in backlog, representing approximately 87% of its anticipated domestic fuel requirements through December 2023. As of December 31, 2023, there were 13.0 million gallons remaining on these contracts. Under these agreements, we will pay fixed prices ranging from $2.35 to $2.90 per gallon. At December 31, 2023, the fair value liabilities on these contracts was $2.9 million, based on quoted market prices and is recorded in accrued liabilities. A 10% change in forward fuel prices would result in a $3.4 million change in the fair value of fuel hedges outstanding at December 31, 2023.

Item 8. Financial Statements and Supplementary Data.

The consolidated financial statements (including financial statement schedules listed under Item 15 of this Report) of the Company called for by this Item, together with the Report of Independent Registered Public Accounting Firm dated February 16, 2024, are set forth on pages 50 to 76 inclusive, of this Report, and are hereby incorporated by reference into this Item. Financial statement schedules not included in this Report have been omitted because they are not applicable or because the information called for is shown in the consolidated financial statements or notes thereto.

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

None.

Item 9A. Controls and Procedures.

Disclosure Controls and Procedures.

a)Evaluation of disclosure controls and procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the Company’s disclosure controls and procedures, as required by Rule 13a-15(b) under the Securities Exchange Act of 1934 (the “Exchange Act”) as of December 31, 2023. Our disclosure controls and procedures are designed to ensure that information required to be disclosed in the reports that we file or submit under the Exchange Act (a) is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding disclosure and (b) is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms.

Based on that evaluation, the Chief Executive Officer and the Chief Financial Officer have concluded that the Company’s disclosure controls and procedures, as designed and implemented, were effective as of December 31, 2023. Notwithstanding the foregoing, a control system, no matter how well designed, implemented and operated can provide only reasonable, not absolute, assurance that it will detect or uncover failures within the Company to disclose material information otherwise required to be set forth in our periodic reports.

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b)Changes in internal control over financial reporting

There were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) during the fiscal quarter ended December 31, 2023 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

c)Management’s annual report on internal control over financial reporting

The management of Great Lakes Dredge & Dock Corporation, including its Chief Executive Officer and Chief Financial Officer, is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13a-15(f), and 15d-15(f) under the Securities Exchange Act of 1934). Management has used the framework set forth in the report entitled Internal Control—Integrated Framework (2013) published by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) to evaluate the effectiveness of the Company’s internal control over financial reporting.

The phrase internal control over financial reporting refers to the process designed by, or under the supervision of, our Chief Executive Officer and Chief Financial Officer, and overseen by our board of directors, management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles, and includes those policies and procedures that:

•Pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company;

•Provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with general accepted accounting principles, and that receipts and expenditures of the Company are being made only in accordance with authorizations of management and directors of the Company; and

•Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the Company’s assets that could have a material effect on the financial statements.

Neither internal control over financial reporting nor disclosure controls and procedures can provide absolute assurance of achieving financial reporting objectives because of their inherent limitations. Internal control over financial reporting and disclosure controls are processes that involve human diligence and compliance, and are subject to lapses in judgment and breakdowns resulting from human failures. Internal control over financial reporting and disclosure controls also can be circumvented by collusion or improper management override. Because of such limitations, there is a risk that material misstatements may not be prevented, detected or reported on a timely basis by internal control over financial reporting or disclosure controls. However, these inherent limitations are known features of the financial reporting process. Therefore, it is possible to design safeguards for these processes that will reduce, although may not eliminate, these risks.

Our independent registered public accounting firm, Deloitte & Touche LLP, who audited Great Lakes’ consolidated financial statements included in this Annual Report on Form 10-K, has issued a report on Great Lakes’ internal control over financial reporting, which is included herein.

Management has concluded that our internal control over financial reporting was effective as of December 31, 2023.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
 

To the stockholders and the Board of Directors of Great Lakes Dredge & Dock Corporation
 

Opinion on Internal Control over Financial Reporting
 

We have audited the internal control over financial reporting of Great Lakes Dredge & Dock Corporation and subsidiaries (the “Company”) as of December 31, 2023, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2023, of the Company and our report dated February 16, 2024, expressed an unqualified opinion on those financial statements.
 

Basis for Opinion
 

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting
 

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
 

/s/ Deloitte & Touche LLP



 

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Chicago, Illinois

February 16, 2024

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Item 9B. Other Information.

Securities Trading Plans of Executive Officers and Directors

Rule 10b5-1 under the Exchange Act provides an affirmative defense that enables pre-arranged transactions in securities in a manner that avoids concerns about initiating transactions at a future date while possibly in possession of material nonpublic information. Our Securities Trading and Disclosure of Confidential Information policy permits our officers and directors to enter into trading plans designed to comply with Rule 10b5-1.

During the quarterly period ended December 31, 2023, none of our officers (as defined in Rule 16a-1(f) under the Exchange Act) or directors adopted or terminated a Rule 10b5-1 trading plan or adopted or terminated a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K).

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections.

None.

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Part III

Item 10. Directors, Executive Officers and Corporate Governance.

Information regarding our executive officers is incorporated by reference herein from the discussion under Item 1. “Business—Information about our Executive Officers” in this Annual Report on Form 10-K.

Code of Ethics

The Company has adopted a written code of business conduct and ethics that applies to all of our employees, including our principal executive officer, principal financial officer, principal accounting officer, controller, and persons performing similar functions. The Company’s code of ethics can be found on our website at www.gldd.com. We will post on our website any amendments to or waivers of the code of business conduct and ethics for executive officers or directors, in accordance with applicable laws and regulations.

The remaining information called for by this Item 10 is incorporated by reference herein from the discussions under the headings “Election of Directors,” “Corporate Governance,” “Security Ownership of Certain Beneficial Owners and Management” and “Delinquent Section 16(a) Reports” in the definitive Proxy Statement for the 2024 Annual Meeting of Stockholders.

Item 11. Executive Compensation.

The information required by Item 11 of Form 10-K is incorporated by reference herein from the discussions under the headings “Executive Compensation Tables,” “Compensation Discussion and Analysis,” “Corporate Governance” and “CEO Pay Ratio” in the definitive Proxy Statement for the 2024 Annual Meeting of Stockholders.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information required by Item 12 of Form 10-K is incorporated by reference herein from the discussion under the headings “Security Ownership of Certain Beneficial Owners and Management” and “Equity Compensation Plan Information” in our definitive Proxy Statement for the 2024 Annual Meeting of Stockholders.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

The information required by Item 13 of Form 10-K is incorporated by reference herein from the discussions under the headings “Corporate Governance” and “Potential Payments Upon Termination or Change of Control” and “Certain Relationships and Related Transactions” in the definitive Proxy Statement for the 2024 Annual Meeting of Stockholders.

Item 14. Principal Accounting Fees and Services.

Our independent registered public accounting firm is Deloitte & Touche LLP (PCAOB ID No. 34).

The information required by Item 14 of Form 10-K is incorporated by reference herein from the discussion under the heading “Matters Related to Independent Registered Public Accounting Firm” in the definitive Proxy Statement for the 2024 Annual Meeting of Stockholders.

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Part IV

Item 15. Exhibits, Financial Statement Schedules.

(a) Documents filed as part of this report

1. Financial Statements

The financial statements are set forth on pages 50 to 76 of this Report and are incorporated by reference in Item 8 of this Report.

2. Financial Statement Schedules

All other schedules, except Schedule II—Valuation and Qualifying Accounts on page 77, are omitted because they are not required or the required information is shown in the financial statements or notes thereto.

3. Exhibits

The exhibits required to be filed by Item 601 of Regulation S-K are listed in the “Exhibit Index” which is attached hereto and incorporated by reference herein.

Item 16. Form 10-K Summary.

None.

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GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES

TABLE OF CONTENTS

	Page
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM	52
CONSOLIDATED FINANCIAL STATEMENTS AS OF DECEMBER 31, 2023 AND 2022, AND FOR THE YEARS ENDED DECEMBER 31, 2023, 2022 AND 2021
Consolidated Balance Sheets	55
Consolidated Statements of Operations	56
Consolidated Statements of Comprehensive Income (Loss)	57
Consolidated Statements of Equity	58
Consolidated Statements of Cash Flows	59
Notes to Consolidated Financial Statements	60

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the stockholders and the Board of Directors of Great Lakes Dredge & Dock Corporation

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Great Lakes Dredge & Dock Corporation and subsidiaries (the “Company”) as of December 31, 2023 and 2022, the related consolidated statements of operations, comprehensive income (loss), equity, and cash flows, for each of the three years in the period ended December 31, 2023, and the related notes and the schedule listed in the Index at Item 15 (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 16, 2024, expressed an unqualified opinion on the Company's internal control over financial reporting.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matters communicated below are matters arising from the current-period audit of the financial statements that were communicated or required to be communicated to the audit committee and that (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Revenue Recognition – Estimated Costs at Completion— Refer to Notes 1 and 10 to the financial statements

Critical Audit Matter Description

During 2023, the Company’s contract revenues were $589.6 million, all of which represented revenue recognized over time as work progressed on individual contracts. The Company recognizes revenue on its contracts utilizing the cost-to-cost method for determining progress toward completion of each contract. Revenue is recognized using contract fulfillment costs incurred to date compared to total estimated fulfillment costs at completion. Daily costs and project duration are significant factors in the estimates of fulfillment costs at completion to complete the project.

We identified estimated contract fulfillment costs at completion used in revenue recognition as a critical audit matter because of the judgments inherent in management’s estimates related to contracts that were in progress at December 31, 2023. This required extensive audit effort and a high degree of auditor judgment when performing audit procedures on the total estimated contract fulfillment costs which underlie management’s determination of revenue on contracts in progress.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to management's total estimated contract fulfillment costs at completion for contracts in progress included the following, among others:

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•We tested the effectiveness of internal controls over revenue recognition, including management's internal controls over estimated contract fulfillment costs at completion.

•We selected a sample of contracts with customers, and we performed the following:

oTested management's process of determining the estimated contract fulfillment costs at completion and evaluated management's ability to achieve the total estimated contract fulfillment costs by obtaining relevant support and inquiring with the Company's project managers and engineers, comparing the estimates to management's work plans, and comparing expected profit margins to those achieved on similar contracts to evaluate whether the estimates were within an acceptable range.

oFor a selection of contracts, we performed in-person site visits and held meetings with the project site managers and project sponsors, who are part of the Company's operations outside of the accounting and finance function, to discuss the contract activities. Further, we utilized a marine global positioning system tracking technology to validate equipment deployed on-site.

•We evaluated management's ability to accurately estimate contract fulfillment costs at completion by performing a hindsight analysis using historical projects and comparing the margin at contract inception compared to the margin at contract completion.

•We compared total contract fulfillment costs on projects completed during the year to management's estimates as of the prior year end to evaluate management's ability to accurately forecast total contract fulfillment costs at completion.

Goodwill— Refer to Notes 1 and 7 to the financial statements

Critical Audit Matter Description

The Company has one operating segment which is also the Company’s one reportable segment and reporting unit of which the Company tests goodwill for impairment. The Company tests goodwill for impairment as of July 1 each year, or more frequently should an event occur or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying amount. The Company performed a quantitative goodwill impairment assessment as of its annual test date of July 1, 2023, which involved comparing the carrying value of the Company’s reporting unit to the estimated fair value of the reporting unit which is based on both the market-based approach using the guideline public company method and income-based approach using a discounted cash flow method. The quantitative goodwill impairment assessment requires the Company to make significant estimates and assumptions related to the valuation of the reporting unit. Changes in these assumptions could have a significant impact on either the fair value of the reporting unit, the amount of any goodwill impairment charge, or both.

The Company's goodwill balance is $76.6 million as of December 31, 2023, and the quantitative goodwill impairment assessment as of the annual test date resulted with the fair value of the reporting unit in excess of its carrying value by at least 10%. Therefore, no goodwill impairment charge was recorded. However, the excess fair value over carrying value is low and as a result, there exists sensitivity to changes in estimates and assumptions between the carrying value and estimated fair value of the reporting unit.

We identified goodwill as a critical audit matter because of (i) the significant judgment inherent in management’s estimates in developing the fair value measurement of the reporting unit including forecasted revenue growth rates, forecasted earnings before income taxes, depreciation and amortization (“EBITDA”) margins, forecasted contract margins, and discount rate; (ii) a high degree of auditor judgment and subjectivity in performing our audit procedures; and (iii) an increased extent of effort, including the need to involve our fair value specialists, when performing audit procedures to evaluate the reasonableness of management's estimates and assumptions.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the selection of the forecasted revenue growth rates, forecasted EBITDA margins, forecasted contract margins, and discount rate (“business assumptions”) used in the quantitative goodwill impairment assessment for the Company’s reporting unit included the following, among others:

•We tested the effectiveness of controls over management’s quantitative goodwill impairment assessment, including those over the selection of the business assumptions used in the fair value measurement.

•We performed sensitivity analyses of the business assumptions to evaluate the reasonableness of management’s assumptions.

•We evaluated the reasonableness of the business assumptions by performing inquiries of the Company’s executives and those outside of the accounting and finance function and also by comparing to historical forecasts and backlog amounts.

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•We evaluated the reasonableness of the business assumptions by comparing the assumptions to (i) similar metrics for guideline public companies, (ii) internal communications to management and the Board of Directors, (iii) analyst reports, and (iv) third-party macroeconomic and industry data.

•With the assistance of our fair value specialists, we evaluated the reasonableness of the (1) valuation methodology and (2) following significant valuation assumptions by:

oTesting the source information underlying the determination of the discount rate, including company-specific risk premium, and the mathematical accuracy of the calculation.

oEvaluating the long-term revenue growth rate in the terminal period through industry and macroeconomic benchmarking.

/s/ Deloitte & Touche LLP

Chicago, Illinois

February 16, 2024

We have served as the Company's auditor since 1991.

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Great Lakes Dredge & Dock Corporation and Subsidiaries

Consolidated Balance Sheets

As of December 31, 2023 and 2022

(in thousands, except per share amounts)

	2023			2022
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	22,841		$	6,546
Accounts receivable—net		54,810			44,890
Contract revenues in excess of billings		68,735			65,922
Inventories		33,912			29,229
Prepaid expenses		1,486			1,568
Other current assets		44,544			34,686
Total current assets		226,328			182,841
PROPERTY AND EQUIPMENT—Net		614,608			543,910
OPERATING LEASE ASSETS		88,398			89,733
GOODWILL		76,576			76,576
INVENTORIES—Noncurrent		86,325			80,044
OTHER		18,605			8,676
TOTAL	$	1,110,840		$	981,780
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	83,835		$	94,077
Accrued expenses		37,361			29,469
Operating lease liabilities		28,687			26,873
Billings in excess of contract revenues		29,560			9,914
Total current liabilities		179,443			160,333
LONG-TERM DEBT		412,070			321,521
OPERATING LEASE LIABILITIES—Noncurrent		61,444			65,010
DEFERRED INCOME TAXES		62,232			59,115
OTHER		10,103			7,581
Total liabilities		725,292			613,560
COMMITMENTS AND CONTINGENCIES (Note 12)
EQUITY:
Common stock—$.0001 par value; 90,000 authorized, 66,623 and 66,188 shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively.		6			6
Additional paid-in capital		317,337			312,091
Accumulated retained earnings		70,220			56,314
Accumulated other comprehensive loss		(2,015	)		(191	)
Total equity		385,548			368,220
TOTAL	$	1,110,840		$	981,780

See notes to consolidated financial statements.

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Great Lakes Dredge & Dock Corporation and Subsidiaries

Consolidated Statements of Operations

For the Years Ended December 31, 2023, 2022 and 2021

(in thousands, except per share amounts)

	2023			2022			2021
CONTRACT REVENUES	$	589,625		$	648,781		$	726,149
COSTS OF CONTRACT REVENUES		511,893			617,608			580,879
GROSS PROFIT		77,732			31,173			145,270
OPERATING EXPENSES:
GENERAL AND ADMINISTRATIVE EXPENSES		57,056			51,117			62,134
OTHER (GAINS) LOSSES		(7,543	)		7,792			(294	)
Total operating income (loss)		28,219			(27,736	)		83,430
OTHER EXPENSE:
Interest expense—net		(12,140	)		(14,108	)		(21,601	)
Other income (loss)		2,233			(1,571	)		994
Total other expense		(9,907	)		(15,679	)		(20,607	)
INCOME (LOSS) BEFORE INCOME TAXES		18,312			(43,415	)		62,823
INCOME TAX (PROVISION) BENEFIT		(4,406	)		9,360			(13,391	)
NET INCOME (LOSS)	$	13,906		$	(34,055	)		49,432
Basic earnings (loss) per share	$	0.21		$	(0.52	)	$	0.75
Basic weighted average shares		66,469			66,051			65,587
Diluted earnings (loss) per share	$	0.21		$	(0.52	)	$	0.75
Diluted weighted average shares		66,957			66,051			66,301

See notes to consolidated financial statements.

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Great Lakes Dredge & Dock Corporation and Subsidiaries

Consolidated Statements of Comprehensive Income (Loss)

For the Years Ended December 31, 2023, 2022 and 2021

(in thousands)

	2023			2022			2021
Net income (loss)	$	13,906		$	(34,055	)	$	49,432
Net change in cash flow derivative hedges—net of tax (1)		(1,824	)		(331	)		(828	)
Comprehensive income (loss)	$	12,082		$	(34,386	)	$	48,604

(1)Net of income tax benefit of $616, $112 and $280 for the years ended December 31, 2023, 2022 and 2021, respectively.

See notes to consolidated financial statements.

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Great Lakes Dredge & Dock Corporation and Subsidiaries

Consolidated Statements of Equity

For the Years Ended December 31, 2023, 2022 and 2021

(in thousands)

	Great Lakes Dredge & Dock Corporation shareholders
											Accumulated
	Shares of				Additional						Other
	Common		Common		Paid-In			Accumulated			Comprehensive
	Stock		Stock		Capital			Retained Earnings			Income (Loss)			Total
BALANCE—January 1, 2021		65,023	$	6	$	304,757		$	40,937		$	968		$	346,668
Share-based compensation		35		—		5,188			—			—			5,188
Vesting of restricted stock units, including impact of shares withheld for taxes		431		—		(3,785	)		—			—			(3,785	)
Exercise of stock options and purchases from employee stock purchase plan		257		—		2,322			—			—			2,322
Net income		—		—		—			49,432			—			49,432
Other comprehensive income—net of tax		—		—		—			—			(828	)		(828	)
BALANCE—December 31, 2021		65,746	$	6	$	308,482		$	90,369		$	140		$	398,997
Share-based compensation		49		—		4,288			—			—			4,288
Vesting of restricted stock units, including impact of shares withheld for taxes		214		—		(1,827	)		—			—			(1,827	)
Exercise of stock options and purchases from employee stock purchase plan		179		—		1,148			—			—			1,148
Net loss		—		—		—			(34,055	)		—			(34,055	)
Other comprehensive loss—net of tax		—		—		—			—			(331	)		(331	)
BALANCE—December 31, 2022		66,188	$	6	$	312,091		$	56,314		$	(191	)	$	368,220
Share-based compensation		56		—		5,231			—			—			5,231
Vesting of restricted stock units, including impact of shares withheld for taxes		156		—		(1,019	)		—			—			(1,019	)
Exercise of stock options and purchases from employee stock purchase plan		223		—		1,034			—			—			1,034
Net income		—		—		—			13,906			—			13,906
Other comprehensive loss—net of tax		—		—		—			—			(1,824	)		(1,824	)
BALANCE—December 31, 2023		66,623	$	6	$	317,337		$	70,220		$	(2,015	)	$	385,548

See notes to consolidated financial statements.

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Great Lakes Dredge & Dock Corporation and Subsidiaries

Consolidated Statements of Cash Flows

For the Years Ended December 31, 2023, 2022 and 2021

(in thousands)

	2023			2022			2021
OPERATING ACTIVITIES:
Net income (loss)		13,906		$	(34,055	)	$	49,432
Adjustments to reconcile net income (loss) to net cash flows provided by operating activities:
Depreciation expense		42,525			46,273			43,016
Deferred income taxes		3,733			(9,270	)		12,311
(Gain) loss on sale of assets		(485	)		7,792			(294	)
Amortization of deferred financing fees		965			1,299			2,349
Share-based compensation expense		6,316			4,288			5,188
Changes in assets and liabilities:
Accounts receivable		(9,921	)		38,064			(43,963	)
Contract revenues in excess of billings		(2,813	)		(26,078	)		(7,738	)
Inventories		(11,000	)		(14,255	)		(2,706	)
Prepaid expenses and other current assets		(10,250	)		(7,636	)		10,873
Accounts payable and accrued expenses		1,376			(1,966	)		(698	)
Billings in excess of contract revenues		19,647			(4,900	)		(17,794	)
Other noncurrent assets and liabilities		(6,574	)		2,097			(969	)
Cash provided by operating activities		47,425			1,653			49,007
INVESTING ACTIVITIES:
Purchases of property and equipment		(150,840	)		(143,006	)		(116,658	)
Proceeds from dispositions of property and equipment		30,699			2,100			4,459
Cash used in investing activities		(120,141	)		(140,906	)		(112,199	)
FINANCING ACTIVITIES:
Repayments of debt		—			—			(325,000	)
Proceeds from issuance of debt		—			—			325,000
Deferred financing fees		—			(981	)		(4,395	)
Taxes paid on settlement of vested share awards		(1,019	)		(1,827	)		(3,785	)
Exercise of stock options and purchases from employee stock plans		1,034			1,148			2,321
Borrowings under revolving loans		208,000			10,000			—
Repayments of revolving loans		(118,000	)		(10,000	)		—
Payments on finance lease obligations		(84	)		—			—
Cash provided by (used in) financing activities		89,931			(1,660	)		(5,859	)
Net (decrease) increase in cash, cash equivalents and restricted cash		17,215			(140,913	)		(69,051	)
Cash, cash equivalents and restricted cash at beginning of period		6,546			147,459			216,510
Cash, cash equivalents and restricted cash at end of period	$	23,761		$	6,546		$	147,459
Cash and cash equivalents	$	22,841		$	6,546		$	145,459
Restricted cash included in other long-term assets		920			—			2,000
Cash, cash equivalents and restricted cash at end of period	$	23,761		$	6,546		$	147,459
Supplemental Cash Flow Information
Cash paid for interest	$	20,738		$	17,742		$	22,919
Cash paid for income taxes	$	132		$	1,264		$	637
Non-cash Investing and Financing Activities
Property and equipment purchased but not yet paid	$	6,000		$	8,686		$	7,010

See notes to consolidated financial statements.

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GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

AS OF December 31, 2023 AND 2022 AND FOR THE

YEARS ENDED December 31, 2023, 2022 AND 2021

(In thousands, except per share amounts or as otherwise noted)

1. NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Organization—Great Lakes Dredge & Dock Corporation and its subsidiaries (the “Company” or “Great Lakes”) are in the business of marine construction, primarily dredging. The Company is the largest provider of dredging services in the United States which is complemented with a long history of performing significant international projects. In addition, the Company is fully engaged in expanding its core business into the rapidly developing offshore wind energy industry. The mobility of the Company’s fleet enables the Company to move equipment in response to changes in demand for dredging services.

Principles of Consolidation and Basis of Presentation—The consolidated financial statements include the accounts of Great Lakes Dredge & Dock Corporation and its majority-owned subsidiaries. All intercompany accounts and transactions are eliminated in consolidation. The equity method of accounting is used for investments in unconsolidated investees in which the Company has significant influence, but not control. Other investments, if any, are carried at cost.

Use of Estimates—The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect certain reported amounts and disclosures. Accordingly, actual results could differ from those estimates.

Revenue and Cost Recognition on Contracts—Revenue is recognized using contract fulfillment costs incurred to date compared to total estimated costs at completion, also known as cost-to-cost, to measure progress towards completion. Additionally, the Company capitalizes certain pre-contract and pre-construction costs, and defers recognition over the life of the contract. The Company’s performance obligations are satisfied over time and revenue is recognized using the cost-to-cost method, described above. Contract modifications are changes in the scope or price (or both) of a contract that are approved by the parties to the contract. The Company recognizes a contract modification when the parties to a contract approve a modification that either creates new, or changes existing, enforceable rights and obligations of the parties to the contract. Contract modifications are routine in the performance of the Company’s contracts. In most instances, contract modifications are for services that are not distinct, and, therefore, are accounted for as part of the existing contract. Contract modifications are included in the transaction price only if it is probable that the modification estimate will not result in a significant reversal of revenue. Revisions in estimated gross profit percentages are recorded in the period during which the change in circumstances is experienced or becomes known. As the duration of most of the Company’s contracts is one year or less, the cumulative net impact of these revisions in estimates, individually and in the aggregate across projects, does not significantly affect results across annual reporting periods. Provisions for estimated losses on contracts in progress are made in the period in which such losses are determined.

The components of costs of contract revenues include labor, equipment (including depreciation, maintenance, insurance and long-term rentals), subcontracts, fuel, supplies, short-term rentals and project overhead. Hourly labor generally is hired on a project-by-project basis. The Company is a party to numerous collective bargaining agreements in the U.S. that govern its relationships with its unionized hourly workforce.

Classification of Current Assets and Liabilities—The Company includes in current assets and liabilities amounts realizable and payable in the normal course of contract completion, unless completion of such contracts extends significantly beyond one year.

Cash Equivalents—The Company considers all highly liquid investments with a maturity at purchase of three months or less to be cash equivalents.

Accounts Receivable—Accounts receivable represent amounts due or billable under the terms of contracts with customers, including amounts related to retainage. The Company anticipates collection of retainage generally within one year, and accordingly presents retainage as a current asset. The Company provides an allowance for estimated uncollectible accounts receivable based on historical and expected losses and when events or conditions indicate that amounts outstanding are not recoverable.

Inventories—Inventories consist of pipe and spare parts used in the Company’s dredging operations. Pipe and spare parts are purchased in large quantities; therefore, a certain amount of pipe and spare part inventories is not anticipated to be used within the

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current year and is classified as long-term. Spare part inventories are stated at weighted average historical cost, and are charged to expense when used in operations. Pipe inventory is recorded at cost and amortized to expense over the period of its use.

Property and Equipment—Capital additions, improvements, and major renewals are classified as property and equipment and are carried at depreciated cost. Maintenance and repairs that do not significantly extend the useful lives of the assets or enhance the capabilities of such assets are charged to expenses as incurred. Depreciation is recorded over the estimated useful lives of property and equipment using the straight-line method and the mid-year depreciation convention. The estimated useful lives by class of assets are:

Class	Useful Life (years)
Buildings and improvements	10
Furniture and fixtures	5-10
Vehicles, dozers, and other light operating equipment and systems	3-5
Heavy operating equipment (dredges and barges)	10-30

Leasehold improvements are amortized over the shorter of their remaining useful lives or the remaining terms of the leases.

Goodwill—Goodwill represents the excess of acquisition cost over fair value of the net assets acquired. Goodwill is tested annually for impairment in the third quarter of each year, or more frequently should circumstances dictate. GAAP requires that goodwill of a reporting unit be tested for impairment between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount.

When conducting the annual impairment test for goodwill, the Company can choose to assess qualitative factors to determine whether it is more likely than not the fair value of the reporting unit is below its carrying value. Qualitative factors considered include macroeconomic, industry and market environments, overall financial performance and market indications of value. If a qualitative assessment determines an impairment is more likely than not, the Company is required to perform a quantitative impairment test. Otherwise, no further analysis is required. The Company also may elect to forego this step and just perform the quantitative impairment test.

When performing a quantitative impairment test, the Company assesses the fair values of its reporting unit using both an income-based approach and a market-based approach. Under the income approach, the fair value of the reporting unit is based on the present value of estimated future cash flows. The income approach is dependent on a number of factors, including estimates of expected future revenue, profitability and capital expenditures related to our new build program, future market growth trends, forecasted revenues and expenses, working capital assumptions, appropriate discount rates and other variables. The market approach measures the value of a reporting unit through comparison to comparable companies. Under the market approach, the Company uses the guideline public company method by applying estimated market-based enterprise value multiples to the reporting unit’s estimated trailing and forward Adjusted EBITDA. The Company analyzes companies that performed similar services or are considered peers. Due to the fact that there are no public companies that are direct competitors, the Company weighs the results of this approach less than the income approach.

The Company has one operating segment which is also the Company’s one reportable segment and reporting unit of which the Company tests goodwill for impairment. In the current year, the Company performed a quantitative goodwill impairment test. The Company performed its annual test of impairment as of July 1, 2023 with no indication of impairment as of the test date. When performing the quantitative test, the Company assessed the fair values of its reporting unit using both a market-based approach and an income-based approach. The assessment used estimates based on assumptions that the Company believes to be reasonable, but such assumptions are subject to unpredictability and uncertainty. Likewise, changes in terminal value and discount rate assumptions, unfavorable economic environment or market conditions and other factors in the future may cause a different assessment. Changes in these estimates and assumptions could materially affect the determination of fair value, and may result in the impairment of goodwill in the event that actual results differ from those estimates. As of the test date, the fair value of the reporting unit was in excess of its carrying value by at least 10%. The Company will continue to monitor for changes in facts or circumstances that may impact our estimates. The Company will perform its next scheduled annual test of goodwill in the third quarter of 2024 should no triggering events occur which would require a test prior to the next annual test.

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Long-Lived Assets—Long-lived assets are comprised of property and equipment subject to depreciation. Long-lived assets to be held and used are reviewed for possible impairment whenever events indicate that the carrying amount of such assets may not be recoverable. Recoverability of long-lived assets is measured by comparing the projected undiscounted cash flows associated with the assets to their carrying amounts. If an asset is considered impaired, the carrying amount would be reduced to its fair value. No triggering events were identified in 2023 or 2022. If long-lived assets are to be disposed, depreciation is discontinued, if applicable, and the assets are reclassified as held for sale at the lower of their carrying amounts or fair values less estimated costs to sell.

Other Gains and Losses—Other gains and losses include gains and losses on property and equipment that has been retired or otherwise disposed of and the transfer of control is complete. This also includes any impairment expense related to assets that have been designated as held for sale whose carrying amounts exceed their fair values. In 2023, the Company recognized $0.1 million in gains on disposals of assets. Additionally, the Company recognized a $7.4 million gain associated with the early termination of an offshore wind contract. In 2022, the Company recorded an $8.2 million loss related to the retirement of an asset which was classified as held for sale at December 31, 2022. This amount was offset by gains on disposals of assets during 2022 of $0.4 million.

Self-insurance Reserves—The Company self-insures costs associated with its seagoing employees covered by the provisions of Jones Act, workers’ compensation claims, hull and equipment liability, and general business liabilities up to certain limits. Insurance reserves are established for estimates of the loss that the Company may ultimately incur on reported claims, as well as estimates of claims that have been incurred but not yet reported. In determining its estimates, the Company considers historical loss experience and judgments about the present and expected levels of cost per claim. Trends in actual experience are a significant factor in the determination of such reserves.

Income Taxes—The provision for income taxes includes federal, foreign, and state income taxes currently payable and those deferred because of temporary differences between the financial statement and tax basis of assets and liabilities. Recorded deferred income tax assets and liabilities are based on the estimated future tax effects of differences between the financial and tax basis of assets and liabilities, given the effect of currently enacted tax laws. Refer to Note 8, Income Taxes.

Hedging Instruments—At times, the Company designates certain derivative contracts as a cash flow hedge as defined by GAAP. Accordingly, the Company formally documents, at the inception of each hedge, all relationships between hedging instruments and hedged items, as well as its risk-management objective and strategy for undertaking hedge transactions. This process includes linking all derivatives to highly-probable forecasted transactions.

The Company formally assesses, at inception and on an ongoing basis, the effectiveness of hedges in offsetting changes in the cash flows of hedged items. Hedge accounting treatment may be discontinued when (1) it is determined that the derivative is no longer highly effective in offsetting changes in the cash flows of a hedged item (including hedged items for forecasted future transactions), (2) the derivative expires or is sold, terminated or exercised, (3) it is no longer probable that the forecasted transaction will occur or (4) management determines that designating the derivative as a hedging instrument is no longer appropriate. If management elects to stop hedge accounting, it would be on a prospective basis and any hedges in place would be recognized in accumulated other comprehensive income (loss) until all the related forecasted transactions are completed or are probable of not occurring.

Recently Issued Accounting Pronouncements—In December 2023, Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740)” (“ASU 2023-09”). The amendments in ASU 2023-09 address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. One of the amendments in ASU 2023-09 includes disclosure of, on an annual basis, a tabular rate reconciliation of (i) the reported income tax expense (or benefit) from continuing operations, to (ii) the product of the income (or loss) from continuing operations before income taxes and the applicable statutory federal income tax rate of the jurisdiction of domicile using specific categories, including separate disclosure for any reconciling items within certain categories that are equal to or greater than a specified quantitative threshold of 5%. ASU 2023-09 also requires disclosure of, on an annual basis, the year to date amount of income taxes paid (net of refunds received) disaggregated by federal, state, and foreign jurisdictions, including additional disaggregated information on income taxes paid (net of refunds received) to an individual jurisdiction equal to or greater than 5% of total income taxes paid (net of refunds received). The amendments in ASU 2023-09 are effective for annual periods beginning after December 15, 2024, and should be applied prospectively. Management is currently evaluating the impact of this guidance.

In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280)” (“ASU 2023-07”). The amendments in ASU 2023-07 improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. Topic 280 requires a public entity to report a measure of segment profit or loss that the chief operating decision maker (CODM) uses to assess segment performance and make decisions about allocating resources. Topic 280 also requires other specified segment items and amounts, such as depreciation, amortization, and depletion expense, to be disclosed under certain circumstances. The amendments in ASU 2023-07 do not change or

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remove those disclosure requirements. The amendments in ASU 2023-07 also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in ASU 2023-07 are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024, adopted retrospectively. Management is currently evaluating the impact of this guidance.

2. EARNINGS (LOSS) PER SHARE

Basic earnings (loss) per share is computed by dividing net income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding during the reporting period. Diluted earnings (loss) per share is computed similar to basic earnings (loss) per share except that it reflects the potential dilution that could occur if dilutive securities or other obligations to issue common stock were exercised or converted into common stock.

The computations for basic and diluted earnings (loss) per share for the years ended December 31, 2023, 2022 and 2021 are as follows:

(shares in thousands)
	2023		2022			2021
Net income (loss)	$	13,906	$	(34,055	)	$	49,432
Weighted-average common shares outstanding — basic		66,469		66,051			65,587
Effect of stock options and restricted stock units		488		—			714
Weighted-average common shares outstanding — diluted		66,957		66,051			66,301
Earnings (loss) per share — basic	$	0.21	$	(0.52	)	$	0.75
Earnings (loss) per share — diluted	$	0.21	$	(0.52	)	$	0.75

For the year ended December 31, 2022 the dilutive effect of 462 thousand of non-qualified stock options (“NQSO”) and restricted stock units (“RSU”) were excluded from the diluted weighted-average common shares outstanding as the Company incurred a loss during the period.

For the years ended December 31, 2023, 2022 and 2021, 430 thousand, 351 thousand and 1 thousand, respectively, NQSO and RSUs were excluded from the calculation of diluted earnings per share based on the application of the treasury stock method, as such NQSOs and RSUs were determined to be anti-dilutive.

3. PROPERTY AND EQUIPMENT

Property and equipment at December 31, 2023 and 2022 are as follows:

	2023			2022
Land	$	9,348		$	9,348
Buildings and improvements		1,314			1,314
Furniture and fixtures		20,090			19,986
Operating equipment		1,068,628			991,574
Total property and equipment		1,099,380			1,022,222
Accumulated depreciation		(484,772	)		(478,312	)
Property and equipment — net	$	614,608		$	543,910

Operating equipment of $2,227 and $500 was classified as held for sale, excluded from property and equipment, as of December 31, 2023 and 2022, respectively. Gain or loss on sale of assets, net includes $886 and $8,150 of loss related to the retirement of an asset which is classified as held for sale for the year ended December 31, 2023 and 2022, respectively.

Depreciation expense was $42,525, $46,273 and $43,016, for the years ended December 31, 2023, 2022 and 2021, respectively.

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4. LEASES

The Company leases certain operating equipment and office facilities under long-term operating leases expiring at various dates through 2030. Leases with an initial term greater than twelve months are recorded on the Company’s balance sheet as an operating or finance lease asset and operating or finance lease liability. Operating leases are included in operating lease assets, operating lease liabilities, and operating lease liabilities noncurrent in the Company's consolidated balance sheets. Finance leases are included in other assets, lease liabilities, and other in the Company's consolidated balance sheets. and are measured at the present value of lease payments over the lease term. Substantially all of the Company’s leases are classified as operating leases. Leases with an initial term of twelve months or less with purchase options or extension options that are not reasonably certain to be exercised are not recorded on the balance sheet. The Company recognizes lease expense for these leases on a straight-line basis over the lease term.

The equipment leases contain renewal or purchase options that specify prices at the then fair value upon the expiration of the lease terms. The leases also contain default provisions that are triggered by an acceleration of debt maturity under the terms of the Company’s Amended Credit Agreement, or, in certain instances, cross default to other equipment leases and certain lease arrangements require that the Company maintain certain financial ratios comparable to those required by its Amended Credit Agreement. Additionally, the leases typically contain provisions whereby the Company indemnifies the lessors for the tax treatment attributable to such leases based on the tax rules in place at lease inception. The tax indemnifications do not have a contractual dollar limit. To date, no lessors have asserted any claims against the Company under these tax indemnification provisions.

The exercise of lease renewal options is at the Company’s sole discretion and is considered in the measurement of operating lease assets and operating lease liabilities when it is reasonably certain the Company will exercise the option. Certain leases also include options to purchase the leased property. The depreciable life of assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise.

On November 1, 2023, the Company entered into a purchase agreement to sell certain vessels (the “Property”) for gross cash proceeds of $29.5 million. Concurrent with the sale of these certain vessels, the Company entered into a seven-year lease at an annual rental rate of approximately $4.2 million. The Company determined that the transactions represented a sale and leaseback and, accordingly, established new operating lease right of use assets and operating lease liabilities. The lease did not include an implicit rate of return; therefore, the Company used an incremental borrowing rate. Under the leaseback agreement, the Company has the option to i) purchase the Property after six years with an early buyout option; ii) purchase the Property at the end of the lease at the then fair value; iii) renew the lease at the then fair market value or iv) return the Property to the purchaser.

Lease costs

The Company’s lease costs are recorded in costs of contract revenues and general and administrative expenses. For the years ended December 31, 2023, 2022 and 2021, respectively, lease costs are as follows:

	2023		2022		2021
Operating lease costs	$	29,945	$	24,224	$	24,427
Finance Lease costs
Amortization of finance lease assets		95		—		—
Interest expense on lease liabilities		24		—		—
Short-term lease costs		68,119		94,842		95,957
Total lease cost	$	98,183	$	119,066	$	120,384

Lease terms and commitments

As recorded on the balance sheet, the Company’s maturity analysis of its operating lease liabilities as of December 31, 2023 is as follows:

	Operating			Finance
2024	$	31,465		$	1,291
2025		23,751			1,291
2026		12,843			1,216
2027		10,984			355
2028		9,601			—
Thereafter		12,574			—
Minimum lease payments		101,218			4,153
Imputed interest		(11,087	)		(480	)
Present value of minimum lease liabilities	$	90,131		$	3,673

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As most of the Company’s leases do not provide an implicit rate, the Company used its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments.

Additional information related to the Company’s leases as of December 31, 2023, 2022 and 2021 respectively, is as follows:

	2023			2022			2021
Operating
Weighted average remaining lease term (years)		4.5			4.2			4.4
Weighted average discount rate		5.6	%		4.7	%		5.1	%
Finance
Weighted average remaining lease term (years)		3.3			—			—
Weighted average discount rate		7.9	%		—			—

Supplemental balance sheet information related to finance leases as of December 31, 2023 and 2022 respectively, is as follows:

	2023			2022
Finance lease assets:
Other noncurrent assets	$	3,757		$	—
Accumulated depreciation		(95	)		—
Total other noncurrent assets	$	3,662		$	—
Finance lease liabilities:
Accrued expenses		1,047			—
Other noncurrent liabilities		2,626			—
Total finance lease liabilities	$	3,673		$	—

Supplemental cash flow information related to leases during the years ended December 31, 2023, 2022 and 2021 respectively, is as follows:

	2023			2022			2021
Operating cash flows from operating leases	$	(29,016	)	$	(22,775	)	$	(22,591	)
Operating cash flows from finance leases		(24	)		—			—
Financing cash flows from finance leases		(84	)		—			—
Lease liabilities arising from obtaining new operating lease assets		24,808			57,618			24,191
Lease liabilities arising from obtaining new finance lease assets		3,757			—			—

5. ACCRUED EXPENSES

Accrued expenses at December 31, 2023 and 2022 were as follows:

	2023		2022
Insurance	$	12,521	$	17,808
Payroll and employee benefits		11,986		2,062
Contract reserves		3,964		966
Fuel hedge contracts		2,918		638
Interest		2,388		1,469
Income and other taxes		1,900		1,419
Finance lease liabilities		1,047		—
Other		637		5,107
Total accrued expenses	$	37,361	$	29,469

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6. LONG-TERM DEBT

Long-term debt at December 31, 2023 and 2022 were as follows:

	2023		2022
Revolving credit facility	$	90,000	$	—
2029 Notes		322,070		321,521
Total	$	412,070	$	321,521

Credit agreement

On July 29, 2022, the Company, Great Lakes Dredge & Dock Company, LLC, NASDI Holdings, LLC, Great Lakes Environmental & Infrastructure Solutions, LLC, Great Lakes U.S. Fleet Management, LLC, and Drews Services LLC (collectively the “Credit Parties”) entered into a second amended and restated revolving credit and security agreement (as amended, supplemented or otherwise modified from time to time, the “Amended Credit Agreement”) with certain financial institutions from time to time party thereto as lenders, PNC Bank, National Association, as Agent (the “Agent”), PNC Capital Markets, CIBC Bank USA, Bank of America, N.A. and Truist Securities, Inc., as Joint Lead Arrangers and Joint Bookrunners, CIBC Bank USA and Truist Bank as Co-Syndication Agents, Bank of America, N.A., as Documentation Agent and PNC Bank National Association, as Green Loan Coordinator. The Amended Credit Agreement amends and restates the prior Amended Credit Agreement dated as of May 3, 2019 by and among the financial institutions from time to time party thereto as lenders, the Agent and the Credit Parties party thereto such that the terms and conditions of the prior credit agreement have been subsumed and replaced in their entirety by the terms and conditions of the Amended Credit Agreement, including the amount available under the revolving credit facility. The terms of the Amended Credit Agreement are summarized below.

The Amended Credit Agreement provides for a senior secured revolving credit facility in an aggregate principal amount of up to $300,000 of which the full amount is available for the issuance of standby letters of credit. The maximum borrowing capacity under the Amended Credit Agreement is determined by a formula and may fluctuate depending on the value of the collateral included in such formula at the time of determination. The Amended Credit Agreement also includes an increase option that will allow the Company to increase the senior secured revolving credit facility by an aggregate principal amount of up to $100,000. This increase is subject to lenders providing incremental commitments for such increase, the Credit Parties having adequate borrowing capacity and provided that no default or event of default exists both before and after giving effect to such incremental commitment increase.

The Amended Credit Agreement contains a green loan option where the Company can borrow at the lower interest rates described below so long as such funds are used to fund capital investments related to renewable energy and clean transportation projects and are consistent with green loan principles. The green loan option is subject to a $35,000 sublimit.

The Amended Credit Agreement contains customary representations and affirmative and negative covenants, including a springing financial covenant that requires the Credit Parties to maintain a fixed charge coverage ratio (ratio of earnings before income taxes, depreciation and amortization, net interest expenses, non-cash charges and losses and certain other non-recurring charges, minus capital expenditures, income and franchise taxes, to net cash interest expense plus scheduled cash principal payments with respect to debt plus restricted payments paid in cash) of not less than 1.10 to 1.00. The springing financial covenant is triggered when the undrawn availability of the Amended Credit Agreement is less than 12.5% of the maximum loan amount for five consecutive days. The Amended Credit Agreement also contains customary events of default (including non-payment of principal or interest on any material debt and breaches of covenants) as well as events of default relating to certain actions by the Company’s surety bonding providers. The obligations of the Credit Parties under the Amended Credit Agreement will be unconditionally guaranteed, on a joint and several basis, by each existing and subsequently acquired or formed material direct and indirect domestic subsidiary of the Company. Borrowings under the Amended Credit Agreement will be used to pay fees and expenses related to the Amended Credit Agreement, finance acquisitions permitted under the Amended Credit Agreement, finance ongoing working capital, for other general corporate purposes, and with respect to any green loan, fund capital investments related to renewable energy and clean transportation projects. The Amended Credit Agreement matures on the earlier of July 29, 2027 or the date that is ninety-one (91) days prior to the scheduled maturity date of the Company’s unsecured senior notes, which is currently June 1, 2029, if the Company fails to refinance its unsecured senior notes prior to their scheduled maturity date but only if such scheduled maturity date is prior to the maturity date of the Amended Credit Agreement.

The obligations under the Amended Credit Agreement are secured by substantially all of the assets of the Credit Parties. The outstanding obligations thereunder shall be secured by a valid first priority perfected lien on substantially all of the U.S. flagged and located vessels of the Credit Parties and a valid perfected lien on all domestic accounts receivable and substantially all other assets of the Credit Parties, subject to the permitted liens and interests of other parties (including the Company’s surety bonding providers).

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Interest on the senior secured revolving credit facility of the Amended Credit Agreement is equal to either a Domestic Rate option or Secured Overnight Financing Rate (“SOFR”) option, at the Company’s election. As of July 29, 2022, (a) the Domestic Rate option is the highest of (1) the base commercial lending rate of PNC Bank, National Association, as publicly announced, (2) the sum of the overnight bank funding rate plus 0.5% and (3) the sum of the daily simple SOFR plus 1.0%, so long as a daily simple SOFR is offered, ascertainable and not unlawful and (b) the SOFR option is the rate that applies for the applicable interest period determined by the Agent and based on the rate published by the CME Group Benchmark Administration Limited (or a successor administrator). After the date on which a borrowing base certificate is required to be delivered under Section 9.2 of the Amended Credit Agreement (commencing with the fiscal quarter ending September 30, 2022), the Domestic Rate option will be the Domestic Rate plus an interest margin ranging between 0.25% and 0.75% and the SOFR option will be the SOFR plus an interest margin ranging between 1.25% and 1.75%, in each case, depending on the quarterly average undrawn availability on the Amended Credit Agreement. Additionally, the Company will have an option to borrow at Green Loan Advance Rates, each of which will be 0.05% lower than the corresponding applicable rate if the Company certifies that it will use such proceeds to invest in renewable energy and clean transportation projects and it complies with green loan principles.

The Company had $90,000 and zero borrowings on the revolver as of December 31, 2023 and 2022, respectively. There were $49,777 and $16,391 of letters of credit outstanding as of December 31, 2023 and 2022, respectively. The Company had $122,320 and $245,713 of net availability under the Amended Credit Agreement as of December 31, 2023 and 2022, respectively. The availability under the Amended Credit Agreement is suppressed by $37,903 and $37,897 as of December 31, 2023 and 2022, respectively, as a result of certain limitations of borrowing related to reserves and compliance with the Company's obligations set forth in the Amended Credit Agreement or the prior credit agreement. Based on the aforementioned variable interest rate components, the weighted average interest rate on the revolver borrowings is 6.71% as of December 31, 2023.

Senior notes and subsidiary guarantors

In May 2021, the Company sold $325,000 of unsecured 5.25% Senior Notes (the “2029 Notes”) pursuant to a private offering. The 2029 Notes were priced to investors at par and will mature on June 1, 2029. The Company used the net proceeds from the offering, together with cash on hand, to redeem all $325,000 aggregate principal amount of its outstanding 8.000% Senior Notes due 2022.

The Company’s obligations under these 2029 Notes are guaranteed by each of the Company’s existing and future 100% owned domestic subsidiaries that are co-borrowers or guarantors under the Amended Credit Agreement. Such guarantees are full, unconditional and joint and several. The parent company issuer has no independent assets or operations and all non-guarantor subsidiaries have been determined to be minor.

Other

The scheduled principal payments through the maturity date of the Company’s long-term debt at December 31, 2023, are as follows:

Years Ending December 31,
2024	$	—
2025		—
2026		—
2027		90,000
2028		—
Thereafter		325,000
Total	$	415,000

The Company incurred amortization of deferred financing fees for its long-term debt of $965, $1,142 and $1,382 for each of the years ended December 31, 2023, 2022 and 2021. Such amortization is recorded as a component of net interest expense.

7. FAIR VALUE MEASUREMENTS

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. A fair value hierarchy has been established by GAAP that requires an entity to maximize the use of observable

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inputs and minimize the use of unobservable inputs when measuring fair value. The accounting guidance describes three levels of inputs that may be used to measure fair value:

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company is exposed to counterparty credit risk associated with non-performance of its various derivative instruments. The Company’s risk would be limited to any unrealized gains on current positions. To help mitigate this risk, the Company transacts only with counterparties that are rated as investment grade or higher. In addition, all counterparties are monitored on a continuous basis.

The Company utilizes the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. At times, the Company holds certain derivative contracts that it uses to manage foreign currency risk or commodity price risk. The Company does not hold or issue derivatives for speculative or trading purposes. The fair values of these financial instruments are summarized as follows:

		Fair Value at
	Fair Value
	Hierarchy	December 31, 2023				December 31, 2022
	Levels	Assets		Liabilities		Assets		Liabilities
Derivatives designated as cash flow hedging instruments:
Fuel hedge contracts	2	$	—	$	2,918	$	—	$	638
Foreign currency exchange hedge contracts	2		358		—		831		6
Total derivatives		$	358	$	2,918	$	831	$	644

Fuel hedge contracts

The Company is exposed to certain market risks, primarily commodity price risk as it relates to the diesel fuel purchase requirements, which occur in the normal course of business. The Company enters into heating oil commodity swap contracts to hedge the risk that fluctuations in diesel fuel prices will have an adverse impact on cash flows associated with its domestic dredging contracts. The Company’s goal is to hedge approximately 80% of the eligible fuel requirements for work in domestic dredging backlog.

As of December 31, 2023, the Company was party to various swap arrangements to hedge the price of a portion of its diesel fuel purchase requirements for work in its backlog to be performed through December 2023. As of December 31, 2023, there were 13.0 million gallons remaining on these contracts representing forecasted domestic fuel purchases through April 2025. Under these swap agreements, the Company will pay fixed prices ranging from $2.35 to $2.90 per gallon.

At December 31, 2023 and 2022, the fair value liability of the fuel hedge contracts were estimated to be $2,918 and $638, respectively, and is recorded in accrued expenses. For fuel hedge contracts considered to be highly effective, the gains reclassified to earnings from changes in fair value of derivatives, net of cash settlements and taxes, for the year ended December 31, 2023 were $861. The remaining gains and losses included in the accumulated other comprehensive income (loss) at December 31, 2023 will be reclassified into earnings over the next twelve months, corresponding to the period during which the hedged fuel is expected to be utilized. Changes in the fair value of fuel hedge contracts not considered highly effective are recorded as costs of contract revenues in the Statement of Operations. The fair value of fuel hedges are corroborated using inputs that are readily observable in public markets; therefore, the Company determines fair values of these fuel hedges using Level 2 inputs.

Foreign currency exchange hedge contracts

The Company is exposed to certain market risks, including foreign currency exchange rate risks related to the purchase of new vessel build materials in Europe. The Company enters into foreign currency exchange forward contracts to hedge the risk that fluctuations in the Euro in relation to the Dollar could have an adverse impact on cash flows associated with its equipment builds.

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As of December 31, 2023 and 2022, the Company was party to various foreign exchange forward contract arrangements to hedge the purchase of materials through November 2024. As of December 31, 2023 there were 18.6 million Euro of payments remaining on these hedge contracts. Under these hedge contracts, the Company will pay fixed prices ranging from $1.01 to $1.13 per Euro.

At December 31, 2023 and 2022, the fair value asset of foreign currency exchange hedge contracts were estimated to be $358 and $831, respectively, and is recorded in other current assets. At December 31, 2023 and 2022, the fair value liability of foreign currency exchange hedge contracts were estimated to be zero and $6, respectively, and is recorded in accrued liabilities. For foreign currency exchange hedge contracts considered to be highly effective, the gains reclassified to earnings from changes in fair value, net of cash settlements and taxes, for the year ended December 31, 2023 were $289. For foreign currency exchange hedge contracts considered to be highly effective, the losses reclassified to earnings from changes in fair value of derivatives, net of cash settlements and taxes, for the year ended December 31, 2022 were $155. The remaining gains and losses included in accumulated other comprehensive income (loss) at December 31, 2023 will be reclassified into earnings over the next eleven months, corresponding to the period during which the hedged currency is expected to be utilized. Changes in the fair value of foreign currency exchange hedge contracts not considered highly effective are recorded as other expenses in the Statement of Operations. The fair values of foreign currency exchange hedges are corroborated using inputs that are readily observable in public markets; therefore, the Company determines the fair value of these foreign currency exchange hedges using Level 2 inputs.

Assets and liabilities measured at fair value on a nonrecurring basis

All other nonfinancial assets and liabilities measured at fair value in the financial statements on a nonrecurring basis are subject to fair value measurements and disclosures. Nonfinancial assets and liabilities included in the consolidated balance sheets and measured on a nonrecurring basis consist of goodwill and long-lived assets. Goodwill and long-lived assets are measured at fair value to test for and measure impairment, if any, at least annually for goodwill or when necessary for both goodwill and long-lived assets.

Accumulated other comprehensive income (loss)

Changes in the components of the accumulated balances of other comprehensive income (loss) are as follows:

	2023			2022			2021
Derivatives:
Fuel Hedge Contracts
Reclassification of derivative (gains) losses to earnings—net of tax	$	861		$	(10,629	)	$	(6,481	)
Change in fair value of derivatives—net of tax		(2,565	)		9,681			5,653
Net change in cash flow derivative fuel hedges—net of tax	$	(1,704	)	$	(948	)	$	(828	)
Foreign Currency Exchange Hedge Contracts
Reclassification of derivative (gains) losses to earnings—net of tax	$	(400	)	$	116		$	—
Change in fair value of derivatives—net of tax		280			501			—
Net change in cash flow derivative foreign currency hedges—net of tax		(120	)		617			—
Total net change in cash flow derivative hedges—net of tax	$	(1,824	)	$	(331	)	$	(828	)

Adjustments reclassified from accumulated balances of other comprehensive income (loss) to earnings are as follows:

	Statements of operations location	2023		2022			2021
Derivatives:
	Costs of contract revenues	$	1,152	$	(14,219	)	$	(8,670	)
	Income tax (provision) benefit		291		(3,590	)		(2,189	)
		$	861	$	(10,629	)	$	(6,481	)

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Other financial instruments

The carrying value of financial instruments included in current assets and current liabilities approximates fair value due to the short-term maturities of these instruments. Based on timing of the cash flows and comparison to current market interest rates, the carrying value of the senior revolving credit agreement approximates fair value. In May 2021, the Company sold $325,000 of the 2029 Notes pursuant to a private offering, which were outstanding at December 31, 2022 (See Note 6, Long-Term Debt). The 2029 Notes were priced to investors at par and will mature on June 1, 2029. The 2029 Notes are senior unsecured obligations of the Company and its subsidiaries that guarantee the 2029 Notes. The fair value of the 2029 Notes was $276,315 at December 31, 2023, which is a Level 1 fair value measurement as the senior notes value was obtained using quoted prices in active markets. It is impracticable to determine the fair value of outstanding letters of credit or performance, bid and payment bonds due to uncertainties as to the amount and timing of future obligations, if any.

8. INCOME TAXES

The Company’s income tax provision (benefit) for the years ended December 31, 2023, 2022 and 2021 are as follows:

	2023		2022			2021
Income tax provision (benefit)	$	4,406	$	(9,360	)	$	13,391

The Company’s income (loss) before income tax from domestic and foreign operations for the years ended December 31, 2023, 2022 and 2021 is as follows:

	2023			2022			2021
Domestic operations	$	19,549		$	(43,179	)	$	65,708
Foreign operations		(1,237	)		(236	)		(2,885	)
Total income (loss) before income tax	$	18,312		$	(43,415	)	$	62,823

The provision (benefit) for income taxes as of December 31, 2023, 2022 and 2021 is as follows:

	2023		2022			2021
Federal:
Current	$	—	$	—		$	—
Deferred		3,292		(9,754	)		11,020
State:
Current		422		(90	)		1,080
Deferred		442		484			1,291
Foreign:
Current		250		—			—
Deferred		—		—			—
Total	$	4,406	$	(9,360	)	$	13,391

The Company’s income tax provision (benefit) reconciles to the provision (benefit) at the statutory U.S. federal income tax rate of 21% for the years ended December 31, 2023, 2022 and 2021, as follows:

	2023			2022			2021
Tax provision (benefit) at statutory U.S. federal income tax rate	$	3,846		$	(9,117	)	$	13,193
State income tax — net of federal income tax benefit		774			(3,952	)		2,144
Adjustment to deferred tax depreciation		—			—			(1,414	)
Stock based compensation		315			(414	)		(1,318	)
Nondeductible officer compensation		178			244			1,195
Research and development tax credits		(796	)		(518	)		(642	)
Changes in valuation allowance		—			4,365			—
Other		89			32			233
Income tax provision (benefit)	$	4,406		$	(9,360	)	$	13,391

At December 31, 2023 and 2022, the Company had loss carryforwards for federal income tax purposes of $14,012 and $54,376 respectively. Of the loss carryforwards at December 31, 2023 $996 expires in 2037 and the remaining $13,016 may be carried forward

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indefinitely. The Company also has indefinite life carryforwards as a result of interest limitations. Starting in 2022, the Company has research costs attributable to research and development that are currently expensed but are required to be capitalized for U.S. tax purposes and amortized primarily over 5 or 15 years.

At December 31, 2023 and 2022, the Company had gross net operating loss carryforwards for state income tax purposes totaling $182,445 and $188,884, respectively, which expire between 2027 and 2043. The Company has established a valuation allowance that was $6,558 and $5,988 as of December 31, 2023 and 2022, respectively. The Company believes that the remaining net operating losses, net of the valuation allowance, will be fully utilized in future periods.

The Company also has foreign gross net operating loss carryforwards of approximately zero and $69 as of December 31, 2023 and 2022, respectively, which expire between 2023 and 2028. At December 31, 2023 and 2022, a full valuation allowance has been established for the deferred tax asset of zero and $24 related to foreign net operating loss carryforwards, respectively, as the Company believes it is more likely than not that the net operating loss carryforwards will not be realized.

The Company does not expect that total unrecognized tax benefits will significantly increase or decrease within the next 12 months.

The Company’s policy is to recognize interest and penalties related to income tax matters in income tax expense. As of December 31, 2023, 2022 and 2021 the Company had no interest and penalties recorded.

The Organisation for Economic Co-operation and Development has proposed a global minimum tax of 15% of reported profits (“Pillar 2”) that has been agreed upon in principle by over 140 countries. During 2023, many countries took steps to incorporate Pillar 2 model rule concepts into their domestic laws. Although the model rules provide a framework for applying the minimum tax, countries may enact Pillar 2 slightly differently than the model rules and on different timelines and may adjust domestic tax incentives in response to Pillar 2. The Company will continue to analyze the law to determine potential impacts. At this time, the Company does not expect the Pillar 2 legislation to have a material impact on its consolidated financial statements.

The Company files income tax returns at the U.S. federal level and in various state and foreign jurisdictions. U.S. federal income tax years prior to 2020 are closed and no longer subject to examination. With few exceptions, the statute of limitations in state taxing jurisdictions in which the Company operates has expired for all years prior to 2019. In foreign jurisdictions in which the Company operates, years prior to 2017 are closed and are no longer subject to examination.

The Company’s deferred tax assets (liabilities) at December 31, 2023 and 2022 are as follows:

	2023			2022
Deferred tax assets:
Operating lease assets	$	23,685		$	23,200
Accrued liabilities		7,378			5,381
Federal NOLs and interest limitations		4,979			15,042
Foreign NOLs		—			24
State NOLs		9,953			10,291
Research costs		5,193			3,175
Tax credit carryforwards		5,457			4,411
Valuation allowance		(6,558	)		(6,012	)
Total deferred tax assets		50,087			55,512
Deferred tax liabilities:
Depreciation and amortization		(88,906	)		(91,923	)
Operating lease liabilities		(23,245	)		(22,657	)
Other liabilities		(168	)		(47	)
Total deferred tax liabilities		(112,319	)		(114,627	)
Net noncurrent deferred tax liabilities	$	(62,232	)	$	(59,115	)

Deferred tax assets relate primarily to reserves and other liabilities for costs and expenses not currently deductible for tax purposes as well as net operating loss and other carryforwards. Deferred tax liabilities relate primarily to the cumulative difference between book depreciation and amounts deducted for tax purposes. The Company evaluates its ability to realize deferred tax assets by considering all available positive and negative evidence. This evidence includes its cumulative earnings or losses in recent years. The Company further considers the impact on these cumulative earnings or losses of discontinued operations and other divested operations

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and joint ventures, restructuring charges and other nonrecurring adjustments that are not indicative of its ability to generate taxable income in future periods. The Company also considers sources of taxable income, such as the amount and timing of realization of its deferred tax liabilities relative to the timing of expiration of loss carryforwards. When it is estimated to be more likely than not that all or some portion of deferred tax assets will not be realized, the Company establishes a valuation allowance for the amount of such deferred tax assets considered to be unrealizable. After evaluating the positive and negative evidence for future realization of deferred tax assets, the Company recorded valuation allowances for foreign net operating loss carryforwards and certain state net operating loss carryforwards to reduce the balance of these deferred tax assets at December 31, 2023 and 2022 as it was more likely than not that the balance of these tax items would not be realized. By contrast, after evaluating the positive and negative evidence, the Company concluded that it was more likely than not that the deferred federal income tax asset and remaining state net operating loss carryforwards recorded at December 31, 2023 and 2022 would ultimately be realized and determined that no valuation allowance was required.

9. SHARE-BASED COMPENSATION

On May 5, 2021, the Company’s stockholders approved the Great Lakes Dredge & Dock Corporation 2021 Long-Term Incentive Plan (the “Incentive Plan”), which previously had been approved by the Company’s board of directors subject to stockholder approval. The Incentive Plan replaces the 2017 Long-Term Incentive Plan (the “Prior Plan”) and is largely based on the Prior Plan, but with updates to the available shares and other administrative changes. The Incentive Plan permits the granting of stock options, stock appreciation rights, restricted stock and restricted stock units to the Company’s employees and directors for up to 1.5 million shares of common stock, plus the number of shares that remained available for future grant under the Prior Plan as of the effectiveness of the Incentive Plan.

The Prior Plan permitted the granting of stock options, stock appreciation rights, restricted stock and restricted stock units to its employees and directors for up to 3.3 million shares of common stock, plus an additional 1.7 million shares underlying equity awards issued under the 2007 Long-Term Incentive Plan. The Company may also issue share-based compensation as inducement awards to new employees upon approval of the board of directors and/or the applicable committee or committees thereof, as may be required.

Compensation cost charged to expense related to share-based compensation arrangements was $6,316, $4,288 and $5,188, for the years ended December 31, 2023, 2022 and 2021, respectively.

Non-qualified stock options

The NQSO awards were granted with an exercise price equal to the market price of the Company’s common stock at the date of grant. The option awards generally vest in three equal annual installments commencing on the first anniversary of the grant date, and have ten year exercise periods.

The fair value of the NQSOs was determined at the grant date using a Black-Scholes option pricing model, which requires the Company to make several assumptions. The risk-free interest rate is based on the U.S. Treasury yield curve in effect for the expected term of the option at the time of grant. The annual dividend yield on the Company’s common stock is based on estimates of future dividends during the expected term of the NQSOs. The expected life of the NQSOs was determined from historical exercise data providing a reasonable basis upon which to estimate the expected life. The volatility assumptions were based on historical volatility of Great Lakes. There is not an active market for options on the Company’s common stock and, as such, implied volatility for the Company’s stock was not considered. Additionally, the Company’s general policy is to issue new shares of registered common stock to satisfy stock option exercises or grants of restricted stock. No NQSO awards were granted in 2023, 2022 and 2021. The aggregate intrinsic value of stock options represents the difference between market value on the date of exercise and the option price. No stock options were exercised during 2023. The aggregate intrinsic value of stock options exercised during 2022 and 2021 was $212 and $1,351, respectively.

A summary of stock option activity under the Incentive Plan as of December 31, 2023, and changes during the year ended December 31, 2023, is presented below:

Options	Shares			Weighted Average Exercise Price		Weighted-Average Remaining Contract Term (yrs)		Aggregate Intrinsic Value ($000's)
Outstanding as of January 1, 2023		76		$	7.61
Granted		—			—
Exercised		—			—
Forfeited or Expired		(11	)		7.56
Outstanding as of December 31, 2023		65		$	7.62		0.4	$	4
Vested at December 31, 2023		65		$	7.62		0.4	$	4

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Restricted stock units

RSUs primarily vest in equal portions over the three year vesting period. The fair value of RSUs was based upon the Company’s stock price on the date of grant. A summary of the status of the Company’s non-vested RSUs as of December 31, 2023, and changes during the year ended December 31, 2023, is presented below:

Non-vested Restricted Stock Units	Shares			Weighted-Average Grant-Date Fair Value
Outstanding as of January 1, 2023		1,107		$	12.62
Granted		825			5.87
Vested		(253	)		11.35
Forfeited		(69	)		7.90
Outstanding as of December 31, 2023		1,610		$	8.68
Expected to vest at December 31, 2023		1,541		$	8.72

As of December 31, 2023, there was $6,661 of total unrecognized compensation cost related to non-vested RSUs granted under the Incentive Plan. That cost for non-vested RSUs is expected to be recognized over a weighted-average period of 1.9 years.

The Incentive Plan permits the employee to use vested shares from RSUs to satisfy the grantee’s U.S. federal income tax liability resulting from the issuance of the shares through the Company’s retention of that number of common shares having a market value as of the vesting date equal to such tax obligation up to the minimum statutory withholding requirements. The amount related to shares used for such tax withholding obligations was approximately $560 and $2,185 for the years ended December 31, 2023 and 2022, respectively.

Director compensation

The Company uses a combination of cash and share-based compensation to attract and retain qualified candidates to serve on its board of directors. Compensation is paid to non-employee directors. Directors who are employees receive no additional compensation for services as members of the board of directors or any of its committees. Share-based compensation is paid pursuant to the Incentive Plan. Each non-employee director of the Company receives an annual retainer of $160, payable quarterly in arrears, and is generally paid 50% in cash and 50% in common stock or deferred restricted stock units of the Company. Directors may elect to receive some or all of the cash retainer in common stock or deferred restricted stock units. In 2023, the Chairman of the Board received an additional $100 of annual compensation, paid 100% in common stock.

In the years ended December 31, 2023, 2022 and 2021, 56 thousand, 106 thousand and 50 thousand shares, respectively, of the Company’s common stock or restricted stock units were issued to non-employee directors under the Incentive Plan.

10. REVENUE

The Company’s revenue is derived from contracts for services with federal, state, local and foreign governmental entities and private customers. Revenues are generally derived from the enhancement or preservation of navigability of waterways or the protection of shorelines through the removal or replenishment of soil, sand or rock.

Performance obligations

A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account upon which the Company’s revenue is calculated. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue as the performance obligation is satisfied. Fixed-price contracts, which comprise substantially all of the Company’s revenue, will most often represent a single performance obligation as the promise to transfer the individual services is not separately identifiable from other promises in the contracts and, therefore, not distinct.

The Company’s performance obligations are satisfied over time and revenue is recognized using contract fulfillment costs incurred to date compared to total estimated costs at completion, also known as cost-to-cost, to measure progress towards completion. As the Company’s performance creates an asset that the customer controls, this method provides a faithful depiction of the transfer of an asset to the customer. Generally, the Company has an enforceable right to payment for performance completed to date.

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The majority of the Company’s contracts are completed in a year or less. At December 31, 2023, the Company had $1.04 billion of remaining performance obligations, which the Company refers to as total dredging backlog. Total dredging backlog does not include $44.6 million of performance obligations related to offshore wind contracts. The Company expects to perform on its offshore wind contracts using the inclined fall-pipe vessel for subsea rock installation which is expected to be delivered and operational in the 2025. Approximately 60% of the Company’s dredging backlog will be completed in 2024.

Transaction price

The transaction price is calculated using the Company’s estimated costs to complete a project. These costs are based on the types of equipment required to perform the specified service, project site conditions, the estimated project duration, seasonality, location and complexity of a project.

The nature of the Company’s contracts gives rise to several types of variable consideration, including pay on quantity dredged for dredging projects and dredging project contract modifications. Estimated pay quantity is the amount of material the Company expects to dredge for which it will receive payment. Estimated quantity to be dredged is calculated using engineering estimates based on current survey data and the Company’s knowledge based on historical project experience.

Revenue by category

Domestically, the Company’s work generally is performed in coastal waterways and deep-water ports. The U.S. dredging market consists of four primary types of work: capital, coastal protection, maintenance and rivers & lakes. Foreign projects typically involve capital work.

The following table sets forth, by type of work, the Company’s contract revenues for the years ended December 31, 2023, 2022 and 2021:

Revenues	2023		2022		2021
Dredging:
Capital—U.S.	$	186,715	$	342,461	$	397,034
Capital—foreign		—		149		6,596
Coastal protection		196,343		192,567		169,678
Maintenance		187,586		98,077		132,551
Rivers & lakes		16,318		15,527		20,290
Total dredging revenues	$	586,962	$	648,781	$	726,149
Offshore Wind:
Offshore Wind		2,663		—		—
Total revenues	$	589,625	$	648,781	$	726,149

The following table sets forth, by type of customer, the Company’s contract revenues for the years ended December 31, 2023, 2022 and 2021:

Revenues	2023		2022		2021
Dredging:
Federal government	$	438,790	$	431,705	$	568,980
State and local government		129,583		207,033		118,712
Private		18,589		9,894		31,861
Foreign		—		149		6,596
Total dredging revenues	$	586,962	$	648,781	$	726,149
Offshore wind:
Offshore wind		2,663		—		—
Total revenues	$	589,625	$	648,781	$	726,149

Contract balances

Billings on contracts are generally submitted after verification with the customers of physical progress and are recognized as accounts receivable in the balance sheet. For billings that do not match the timing of revenue recognition, the difference between amounts billed and recognized as revenue is reflected in the balance sheet as either contract revenues in excess of billings or billings in

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excess of contract revenues. Certain pre-contract and pre-construction costs are capitalized and reflected as contract assets in the balance sheet. Customer advances, deposits and commissions are reflected in the balance sheet as contract liabilities.

Accounts receivable at December 31, 2023 and December 31, 2022 are as follows:

	2023			2022
Completed contracts	$	2,920		$	4,682
Contracts in progress		40,743			32,546
Retainage		11,511			8,226
		55,174			45,454
Allowance for doubtful accounts		(364	)		(564	)
Total accounts receivable—net	$	54,810		$	44,890

The components of contracts in progress at December 31, 2023 and December 31, 2022 are as follows:

	2023			2022
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	206,330		$	262,125
Amounts billed		(196,520	)		(210,068	)
Costs and earnings in excess of billings for contracts in progress		9,810			52,057
Costs and earnings in excess of billings for completed contracts		58,925			14,972
Total contract revenues in excess of billings	$	68,735		$	67,029
Current portion of contract revenues in excess of billings	$	68,735		$	65,922
Long-term contract revenues in excess of billings		—			1,107
Total contract revenues in excess of billings	$	68,735		$	67,029
Billings in excess of costs and earnings:
Amounts billed	$	(258,948	)	$	(95,013	)
Costs and earnings for contracts in progress		229,388			85,099
Total billings in excess of contract revenues	$	(29,560	)	$	(9,914	)

In the year ending December 31, 2022, a revision to the estimated gross profit percentage of a project was recognized due to a positive settlement of a claim from the recently completed project resulting in a cumulative net impact on the project margin, which increased gross profit by $22,276.

At December 31, 2023 and 2022, costs to fulfill contracts with customers recognized as other current assets were $18,138 and $4,472, respectively. At December 31, 2023, costs to fulfill contracts with customers recognized as other noncurrent assets were $4,028. At December 31, 2022, there were no costs to fulfill contracts with customers recognized as other noncurrent assets. These costs relate to pre-contract and pre-construction activities. During the years ended December 31, 2023 and 2022 the company amortized pre-contract and pre-construction costs of $11,474 and $11,148, respectively.

The Company’s largest domestic customer is the U.S. Army Corps of Engineers (the “Corps”), which has responsibility for federally funded projects related to navigation and flood control of U.S. waterways. In 2023, 2022 and 2021, 75%, 67% and 78%, respectively, of contract revenues were earned from contracts with federal government agencies, including the Corps, as well as other federal entities such as the U.S. Coast Guard and U.S. Navy. During the year ended December 31, 2021 the Company recognized $716 of revenue related to the use of equipment by a customer working on a federal government contract. At December 31, 2023 and 2022, approximately 36% and 46% respectively, of accounts receivable, including contract revenues in excess of billings and retainage, were due on contracts with federal government agencies. The Company depends on its ability to continue to obtain federal government contracts, and indirectly, on the amount of federal funding for new and current government dredging projects. Therefore, the Company’s operations can be influenced by the level and timing of federal funding.

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The Company derived revenues and gross loss from foreign project operations for the years ended December 31, 2023, 2022, and 2021, as follows:

	2023			2022			2021
Contract revenues	$	—		$	149		$	6,596
Costs of contract revenues		(1,142	)		(341	)		(9,281	)
Gross loss	$	(1,142	)	$	(192	)	$	(2,685	)

In 2022 and 2021, foreign revenues were primarily from work done in the Middle East. The majority of the Company’s long-lived assets are marine vessels and related equipment. At any point in time, the Company may employ certain assets outside of the U.S., as needed, to perform work on the Company’s foreign projects. As of December 31, 2023 and 2022, long-lived assets located outside of the U.S had no net book value. Currently our assets outside of the U.S. do not include dredges. Revenue from foreign projects has been concentrated in the Middle East which comprised less than 1% in 2023, 2022 and 2021. At December 31, 2023, there were no accounts receivable due on contracts in the Middle East. At December 31, 2022, approximately 9%, of total accounts receivable, including retainage and contract revenues in excess of billings, were due on contracts in the Middle East.

11. RETIREMENT PLANS

The Company sponsors two 401(k) savings plans, one covering substantially all non-union salaried employees (“Salaried Plan”), a second covering its hourly employees (“Hourly Plan”). Under the Salaried Plan and the Hourly Plan, individual employees may contribute a percentage of compensation and the Company will match a portion of the employees’ contributions. The Salaried Plan also includes a discretionary profit-sharing component, permitting the Company to make discretionary employer contributions to all eligible employees of these plans. Additionally, the Company sponsors a Supplemental Savings Plan in which the Company makes contributions for certain key executives. The Company’s expense for matching, discretionary and Supplemental Savings Plan contributions for 2023, 2022 and 2021, was $4,757, $2,996 and $4,659, respectively.

The Company also contributes to various multiemployer pension plans pursuant to collective bargaining agreements. In 2023, 2022 and 2021, the Company contributed $5,153, $4,915 and $4,632 respectively to all of the multiemployer plans that provide pension benefits. The information available to the Company about the multiemployer plans in which it participates, whether via request to the plan or publicly available, is generally dated due to the nature of the reporting cycle of multiemployer plans and legal requirements under the Employee Retirement Income Security Act (“ERISA”) as amended by the Multiemployer Pension Plan Amendments Act (“MPPAA”). Based upon these plans’ most recently available annual reports, the Company’s contributions to these plans were less than 5% of each plan’s total contributions.

The Company does not expect any future increased contributions to have a material negative impact on its financial position, results of operations or cash flows for future years. The risks of participating in multiemployer plans are different from single employer plans as assets contributed are available to provide benefits to employees of other employers and unfunded obligations from an employer that discontinues contributions are the responsibility of all remaining employers. In addition, in the event of a plan’s termination or the Company’s withdrawal from a plan, the Company may be liable for a portion of the plan’s unfunded vested benefits. However, information from the plans’ administrators is not available to permit the Company to determine its share, if any, of unfunded vested benefits.

12. COMMITMENTS AND CONTINGENCIES

Commercial commitments

Performance and bid bonds are customarily required for dredging and marine construction projects. The Company has bonding agreements with Argonaut Insurance Company, ACE Holdings, Liberty Mutual Insurance Company and Philadelphia Indemnity Insurance Company, (collectively, the “Sureties”) under which the Company can obtain performance, bid and payment bonds. The Company also currently has outstanding bonds with Travelers Casualty and Surety Company of America, Berkley Insurance Company and Zurich American Insurance Company. Bid bonds are generally obtained for a percentage of bid value and amounts outstanding typically range from $1,000 to $10,000. At December 31, 2023, the Company had outstanding performance bonds with a notional amount of approximately $960,906. The revenue value remaining in backlog related to the projects totaled approximately $546,759.

Certain foreign projects performed by the Company have warranty periods, typically spanning no more than one to three years beyond project completion, whereby the Company retains responsibility to maintain the project site to certain specifications during the warranty period. Generally, any potential liability of the Company is mitigated by insurance, shared responsibilities with consortium partners, and/or recourse to owner-provided specifications.

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Legal proceedings and other contingencies

As is customary with negotiated contracts and modifications or claims to competitively bid contracts with the federal government, the government has the right to audit the books and records of the Company to ensure compliance with such contracts, modifications, or claims, and the applicable federal laws. The government has the ability to seek a price adjustment based on the results of such audit. Any such audits have not had, and are not expected to have, a material impact on the financial position, operations, or cash flows of the Company.

Various legal actions, claims, assessments and other contingencies arising in the ordinary course of business are pending against the Company and certain of its subsidiaries. The Company will defend itself vigorously on all matters. These matters are subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved, or settled adversely to the Company. Although the Company is subject to various claims and legal actions that arise in the ordinary course of business, except as described below, the Company is not currently a party to any material legal proceedings or environmental claims. The Company records an accrual when it is probable a liability has been incurred and the amount of loss can be reasonably estimated. The Company does not believe any of these proceedings, individually or in the aggregate, would be expected to have a material effect on results of operations, cash flows or financial condition.

On April 23, 2014, the Company completed the sale of NASDI, LLC (“NASDI”) and Yankee Environmental Services, LLC (“Yankee”), which together comprised the Company’s historical demolition business, to a privately-owned demolition company. The Company has been involved in litigation relating to this sale, and on April 11, 2022 the Supreme Court of Delaware affirmed an earlier decision by Delaware Court of Chancery granting the Company a $21,934 judgment relating to the buyer's default of its obligations to indemnify the Company for losses resulting from failure to perform in accordance with terms of a surety performance bond. Following this judgment, the Company continued to aggressively pursue collection from the buyer on outstanding amounts owed under the sale and the indemnification. On April 24, 2023, the Company settled the remaining litigation related to the sale and subsequent buyer's default of its obligations to indemnify the Company. The settlement called for a one-time payment to the Company from entities affiliated with the buyer in the amount of $1,250, a disbursement to the Company from a litigation escrow account in the amount of $680 and a release of funds retained by New York City to the Company in connection with a pre-purchase construction project, which is expected to be approximately $800 after the payment of related expenses. For the year ended December 31, 2023, the Company recorded a $2,410 benefit in cost of contract revenues and $784 in other income related to the settlement and the release of certain liabilities related to the original sale. As of December 31, 2023, the Company has received $1,930 of the settlement, with the remaining $800 yet to be released by New York City. This amount is recorded in prepaid expenses and other current assets in the consolidated balance sheets.

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Lease obligations

The Company leases certain operating equipment and office facilities under long-term operating leases expiring at various dates through 2030. The equipment leases contain renewal or purchase options that specify prices at the then fair value upon the expiration of the lease terms. The leases also contain default provisions that are triggered by an acceleration of debt maturity under the terms of the Company’s Amended Credit Agreement, or, in certain instances, cross default to other equipment leases and certain lease arrangements require that the Company maintain certain financial ratios comparable to those required by its Amended Credit Agreement. Additionally, the leases typically contain provisions whereby the Company indemnifies the lessors for the tax treatment attributable to such leases based on the tax rules in place at lease inception. The tax indemnifications do not have a contractual dollar limit. To date, no lessors have asserted any claims against the Company under these tax indemnification provisions.

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Great Lakes Dredge & Dock Corporation
Schedule II—Valuation and Qualifying Accounts
For the Years Ended December 31, 2023, 2022 and 2021
(In thousands)
	Beginning Balance		Additions		Deductions		Ending balance
Description
Year ended December 31, 2021
Allowances deducted from assets to which they apply:
Allowances for doubtful accounts	$	564	$	—	$	—	$	564
Valuation allowance for deferred tax assets		2,473		14		—		2,487
Total	$	3,037	$	14	$	—	$	3,051
Year ended December 31, 2022
Allowances deducted from assets to which they apply:
Allowances for doubtful accounts	$	564	$	—	$	—	$	564
Valuation allowance for deferred tax assets		2,487		3,525		—		6,012
Total	$	3,051	$	3,525	$	—	$	6,576
Year ended December 31, 2023
Allowances deducted from assets to which they apply:
Allowances for doubtful accounts	$	564	$	—	$	200	$	364
Valuation allowance for deferred tax assets		6,012		546		—		6,558
Total	$	6,576	$	546	$	200	$	6,922

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I. EXHIBIT INDEX

Number	Document Description
2.1	Amended and Restated Agreement and Plan of Merger dated as of December 22, 2003, among Great Lakes Dredge & Dock Corporation, GLDD Acquisitions Corp., GLDD Merger Sub, Inc. and Vectura Holding Company LLC. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on January 6, 2004).
2.2	Agreement and Plan of Merger by and among GLDD Acquisitions Corp., Aldabra Acquisition Corporation, and certain shareholders of Aldabra Acquisition Corporation and GLDD Acquisitions Corp., dated as of June 20, 2006. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on June 22, 2006).
3.1	Amended and Restated Certificate of Incorporation of Great Lakes Dredge & Dock Holdings Corp., effective December 26, 2006 (now renamed Great Lakes Dredge & Dock Corporation). (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Registration Statement on Form 8-A12B filed with the Commission on December 26, 2006).
3.2	Second Amended and Restated Bylaws of Great Lakes Dredge & Dock Corporation, dated as of January 12, 2023. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on January 19, 2023).
3.3	Certificate of Ownership and Merger of Great Lakes Dredge & Dock Corporation with and into Great Lakes Dredge & Dock Holdings Corp. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on December 29, 2006).
4.1	Description of Great Lakes Dredge & Dock Corporation Securities Registered Pursuant to Section 12 of the Exchange Act. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Annual Report on Form 10-K filed with the Commission on February 26, 2020).
4.2	Specimen Common Stock Certificate for Great Lakes Dredge & Dock Corporation. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Annual Report on Form 10-K filed with the Commission on March 22, 2007).
4.3	Indenture, dated May 25, 2021, among Great Lakes Dredge & Dock Corporation, as Issuer, the guarantors party thereto, and Wells Fargo Bank, National Association, as Trustee, relating to the 2029 Notes (incorporated by reference to Great Lakes Dredge & Dock Corporation’s Quarterly Report on Form 10-Q filed with the Commission on August 3, 2021).
4.4	Form of 2029 Notes (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Quarterly Report on Form 10-Q filed with the Commission on August 3, 2021).
10.1	Employment Agreement between Great Lakes Dredge & Dock Corporation and Lasse Petterson, dated as of April 28, 2017. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on May 1, 2017).†
10.2	Employment Agreement between Great Lakes Dredge & Dock Corporation and Scott Kornblau, dated as of September 29, 2021. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on October 4 , 2021).†
10.3	Employment Agreement between Great Lakes Dredge & Dock Corporation and Vivienne Schiffer, dated as of December 7, 2020. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Annual Report on Form 10-K filed with the Commission on February 23, 2022). †
10.4	Employment Agreement between Great Lakes Dredge & Dock Corporation and Eleni Beyko, dated as of January 8, 2021. * †
10.5	Second Amended and Restated Great Lakes Dredge & Dock Company, LLC Annual Bonus Plan effective as of January 1, 2012 (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on January 17, 2012).†
10.6	401 (k) Savings Plan. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Annual Report on Form 10-K filed with the Commission on March 30, 2005).†

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Number	Document Description
10.7	Amended and Restated Great Lakes Dredge & Dock Corporation Supplemental Savings Plan effective January 1, 2014. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Annual Report on Form 10-K filed with the Commission on March 11, 2014).†
10.8	Great Lakes Dredge & Dock Corporation Director Deferral Plan, adopted on November 8, 2017 (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Annual Report on Form 10-K filed with the Commission on February 28, 2018).†
10.9	Form of Investor Rights Agreement among Aldabra Acquisition Corporation, Great Lakes Dredge & Dock Holdings Corp., Madison Dearborn Capital Partners IV, L.P., certain stockholders of Aldabra Acquisition Corporation and certain stockholders of GLDD Acquisitions Corp. (Incorporated by reference to Great Lakes Dredge & Dock Holding Corp.’s Registration Statement on Form S-4 filed with the Commission on August 24, 2006).
10.10	Great Lakes Dredge & Dock Corporation 2017 Long-Term Incentive Plan (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on May 17, 2017).†
10.11	Great Lakes Dredge & Dock Corporation 2021 Long-Term Incentive Plan (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on May 7, 2021).†
10.12	Form of Great Lakes Dredge & Dock Corporation Restricted Stock Unit Award Agreement pursuant to the Great Lakes Dredge & Dock Corporation 2017 Long-Term Incentive Plan. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Quarterly Report on Form 10-Q filed with the Commission on May 4, 2018). †
10.13	Form of Great Lakes Dredge & Dock Corporation Performance-Based Restricted Stock Unit Award Agreement (Three Year Form) pursuant to the Great Lakes Dredge & Dock Corporation 2017 Long-Term Incentive Plan. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Quarterly Report on Form 10-Q filed with the Commission on May 4, 2018). †
10.14	Restricted Stock Unit Award Notice pursuant to the Great Lakes Dredge & Dock Corporation 2017 Long-Term Incentive Plan. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Quarterly Report on Form 10-Q filed with the Commission on May 3, 2019). †
10.15	Performance-Based Restricted Stock Unit Award Notice pursuant to the Great Lakes Dredge & Dock Corporation 2017 Long-Term Incentive Plan. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Quarterly Report on Form 10-Q filed with the Commission on May 3, 2019). †
10.16	Purchase Agreement, dated May 12, 2021, by and among the Company, certain subsidiary guarantors named therein and BofA Securities, Inc., as representative of the initial purchasers named therein. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on May 18, 2021).
10.17	Second Amended and Restated Revolving Credit and Security Agreement dated as of July 29, 2022 by and among Great Lakes Dredge & Dock Corporation, as Borrower, each other Credit Party party hereto from time to time, the financial institutions which are now or which hereafter become a party hereto as lenders, PNC Bank, National Association, as Agent (the “Agent”), PNC Capital Markets, CIBC Bank USA, Bank of America, N.A. and Truist Securities, Inc., as Joint Lead Arrangers and Joint Bookrunners, CIBC Bank USA and Truist Bank as Co-Syndication Agents, Bank of America, N.A., as Documentation Agent and PNC Bank National Association, as Green Loan Coordinator (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on August 1, 2022)
10.18	Vessel Construction Agreement, dated June 5, 2020 by and between Conrad Shipyard, L.L.C., and Great Lakes Dredge & Dock Company, LLC. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Quarterly Report on Form 10-Q filed with the Commission on August 4, 2020). (1)
10.19	Vessel Construction Agreement, dated November 15, 2021 by and between Philly Shipyard Inc., and Great Lakes Dredge & Dock Company, LLC. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Annual Report on Form 10-K filed with the Commission on February 23, 2022). (1)
10.20	Consulting Agreement, dated December 1, 2022, between Great Lakes Dredge & Dock Company, LLC and David E. Simonelli. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Quarterly Report on Form 10-Q Filed with the Commission on May 2, 2023.
14.1	Code of Business Conduct and Ethics. (Incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on May 18, 2016).

81

Number	Document Description
21.1	Subsidiaries of Great Lakes Dredge & Dock Corporation. *
23.1	Consent of Deloitte & Touche LLP. *
31.1	Certification Pursuant to Rules 13a-14 and 15d-14 under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *
31.2	Certification Pursuant to Rules 13a-14 and 15d-14 under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *
32.1	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. *
32.2	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. *
97	Great Lakes Dredge & Dock Corporation Statement of Policy Regarding Incentive Compensation Recoupment. *
101.INS	Inline XBRL Instance Document. *
101.SCH	Inline XBRL Taxonomy Extension Schema with embedded Linkbase documents. *
104	Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101) *

(1)
Portions of this exhibit have been omitted pursuant to Rule 601(b)(10) of Regulation S-K. The omitted information is not material and is the type of information that the Company treats as private and confidential.

* Filed herewith

† Compensatory plan or arrangement

82

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Great Lakes Dredge & Dock Corporation
(registrant)
By:	/s/ Scott Kornblau
	Scott Kornblau
	Senior Vice President, Chief Financial Officer and Treasurer
	(Principal Financial Officer and Duly Authorized Officer)
Date: February 16, 2024

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capabilities and on the dates indicated.

Signature	Date	Title
/s/ Lasse J. Petterson	February 16, 2024	President, Chief Executive Officer and Director
Lasse J. Petterson		(Principal Executive Officer)
/s/ Scott Kornblau	February 16, 2024	Senior Vice President, Chief Financial Officer and Treasurer
Scott Kornblau		(Principal Financial Officer)
/s/ Ryan M. Bayer	February 16, 2024	Vice President and Chief Accounting Officer
Ryan M. Bayer		(Principal Accounting Officer)
/s/ Lawrence R. Dickerson	February 16, 2024	Chairman of the Board and Director
Lawrence R. Dickerson
/s/ Ryan J. Levenson	February 16, 2024	Director
Ryan J. Levenson
/s/ Kathleen M. Shanahan	February 16, 2024	Director
Kathleen M. Shanahan
/s/ Earl Shipp	February 16, 2024	Director
Earl Shipp
/s/ Ronald R. Steger	February 16, 2024	Director
Ronald R. Steger
/s/ D. Michael Steuert	February 16, 2024	Director
D. Michael Steuert

83

EX-10.4

Exhibit 10.4

EMPLOYMENT AGREEMENT

This EMPLOYMENT AGREEMENT (the “Agreement”) is made as of this 8th day of January, 2021 (the “Agreement Date”), by and between Great Lakes Dredge & Dock Corporation (the “Corporation”), with and on behalf of its wholly-owned subsidiaries (together, the “Company”), and Eleni Beyko (“Executive”).

ARTICLE I

EMPLOYMENT SERVICES

1.1Term of Employment. Executive’s employment under this Agreement shall commence

on January 25th, 2021 (the “Start Date”) and continue until the second annual anniversary of such

date, unless terminated earlier pursuant to Article III herein (the “Initial Employment Term”). The Employment Term shall be extended automatically for successive one-year periods unless, at least 60 days prior to expiration of the Employment Term, either party gives written notice to the other party that it does not wish to renew the Agreement (such one-year extension(s) and the Initial Employment Term to be, collectively, the “Employment Term”).

1.2Position and Duties. During the Employment Term, Executive shall hold the position of Senior Vice President – Offshore Wind and shall report to the Company’s Chief Executive Officer. Executive shall perform such duties and responsibilities as are consistent with a senior executive of the Company and those duties as may be assigned to Executive by the Chief Executive Officer from time to time. Executive shall devote Executive’s full business time, attention, skill and energy to the business and affairs of the Company and shall use Executive’s reasonable best efforts to perform such responsibilities in a diligent, loyal, and businesslike manner so as to advance the best interests of the Company. Executive shall act in conformity with Company’s written and oral policies and within the limits, budgets and business plans set by the Company, and shall adhere to all rules and regulations in effect from time to time relating to the conduct of employees of the Company. Executive’s office will be at the principal corporate offices of the Company, and Executive will be expected to conduct his/her activities from such office other than when traveling on behalf of the Company. Notwithstanding the foregoing, Executive shall be permitted to devote a reasonable amount of time and effort to civic and charitable organizations and managing personal investments; but only to the extent that such activities, individually or as a whole, do not materially interfere with the execution of Executive’s duties hereunder, or otherwise violate any provision of this Agreement. Executive shall not become involved in the management of any corporation, partnership, or other entity, including serving on the board of directors of any for-profit private or publicly traded company, without the written consent of the Corporation’s Board of Directors (the “Board”).

1.3Service on Board. The Company may require Executive to serve without additional compensation as a member of the Board or as an officer or director of any of the Company entities. Any compensation or other remuneration received from such service may be offset against the amounts due hereunder.

ARTICLE II

COMPENSATION

2.1Base Salary. The Company shall pay Executive an annual base salary (“Base Salary”) of $300,000.00 (fixed for fiscal year 2021), payable in accordance with the general payroll practices of the Company. The Board may, in its sole discretion, increase Executive’s Base Salary, or it may decrease Executive’s Base Salary by up to ten percent (10%) if there is a salary reduction affecting substantially all similarly situated senior managers of the Company.

2.2Incentive Compensation. Executive will be eligible to participate in any annual performance bonus plans and long-term incentive plans established and maintained by the Company for

certain senior managers including, but not limited to, the Annual Bonus Plan, 2017 Long-Term Incentive

Plan or such similar or successor plans as the Company may establish. Such bonus will be paid in accordance with the Company’s standard practice, but in any event no later than 2.5 months after the end of the calendar year in which Executive earns such bonus. All incentive compensation paid to Executive will be subject to the terms of the Company’s policy for recovering overpayments of incentive compensation in certain circumstances, including a restatement of reported financial or operating results, fraud, or misconduct, in effect from time to time.

2.3Equity Compensation. Executive will be eligible to participate in any equity-based compensation plans established or maintained by the Company for certain similarly situated senior managers, including but not limited to the Company’s 2017 Long-Term Incentive Plan and any successor thereto. All equity compensation paid to Executive will be subject to the terms of the Company’s recoupment policy in effect from time to time.

2.4Employee Benefit Plans. Executive will be eligible to participate on substantially the same basis as the Company’s other similarly situated employees in any other employee benefit plans offered by the Company to similarly situated senior managers, including, without limitation, the Company’s Supplemental Savings Plan (or any successor thereto), medical, dental, short-term and long-term disability, life, pension, profit sharing and nonqualified deferred compensation arrangements. The Company reserves the right to modify, suspend or discontinue any and all of the plans, practices, policies and programs and eligibility thereunder at any time, in its sole discretion, without recourse by Executive.

2.5Vacation/Paid Time Off. Executive will be entitled to twenty-two days of paid vacation per calendar year, subject to the Company’s vacation policy in effect from time to time. The Company may, at its discretion, increase (but not decrease) Executive’s vacation entitlement.

2.6Business Expenses. The Company will reimburse Executive for all reasonable and necessary business expenses incurred in the performance of services with the Company, according to the Company’s policies and upon Executive’s presentation of an itemized written statement and such verification as the Company may require.

2.7D&O Insurance; Indemnification. During the Employment Term, the Company will purchase and maintain, at its own expense, directors' and officers' liability insurance providing coverage to Executive on terms equivalent to those provided to other executive officers. Further, the Company will defend, indemnify and hold Executive harmless, the maximum extent permitted by applicable law and permitted by the Company’s governing documents, from and against legal claims which may be asserted against Executive arising out of Executive’s good faith performance of duties pursuant to this Agreement.

ARTICLE III

TERMINATION OF EMPLOYMENT

3.1Voluntary Resignation Without Good Reason. Executive may terminate his/her employment for any reason by giving the Company 30 days’ prior written notice of a voluntary resignation date (“Resignation Date”). Upon receiving Executive’s notice of intent to resign, the Company may require that Executive cease performing services for the Company at any time before the Resignation Date, so long as the Company continues Executive’s Base Salary under Section 2.1 and employee benefits under Section 2.4 through the Resignation Date. Except as otherwise provided under law or the terms of any employee benefit plans in which Executive participates, Executive shall not be entitled to receive any compensation or benefits from the Company after the Resignation Date if he/she voluntarily terminates employment hereunder without Good Reason

3.2Termination By Company With Cause. The Company may terminate Executive’s employment for Cause (as defined below) by giving written notice to Executive designating an immediate or future termination date (“Cause Termination Date”). In the event of a termination for Cause, the Company shall pay Executive his/her Base Salary under Section 2.1 and employee benefits under Section

2.4 through the Cause Termination Date. Except as otherwise provided under law or the terms of any employee benefit plans in which Executive participates, Executive shall not be entitled to receive any compensation or benefits from the Company after the Cause Termination Date.

For purposes of this Agreement, “Cause” means:

(a)Executive materially breaches this Agreement;

(b)Executive commits an act constituting a felony or engages in illegal, unethical, or immoral conduct that, in the reasonable judgment of the Board, could injure the integrity, character, or reputation of the Company;

(c)Executive is convicted, enters a plea of no contest or nolo contendere, or receives deferred adjudication or un-adjudicated probation for any felony or any crime involving moral turpitude; or

(d)Executive fails or refuses to carry out, or comply with, in any material respect, any lawful directive of the Chief Executive Officer (or Executive’s direct supervisor at the time) that is consistent with the terms of the Agreement or with the Company’s written plans and policies, which is not remedied within 30 days after Executive’s receipt of written notice of same from the Company.

3.3Termination By Company Without Cause or by Executive for Good Reason. The Company may terminate Executive’s employment without Cause by giving written notice to Executive designating an immediate or future termination date. Executive may terminate his/her employment hereunder for Good Reason, which will be treated as a termination by the Company without Cause. The effective date of a termination by the Company without Cause or by Executive for Good Reason will be the Executive’s “Termination Date.”

Good Reason means the occurrence of all of the following: (a) an involuntary, material diminution of Executive’s authority, reporting line, duties or responsibilities that is not intended to be temporary, (b) Executive provides written notice to the Company’s Board and Chief Executive Officer of the specific diminution within thirty days after it takes effect, gives the Company thirty days to cure same, and the condition remains uncured, and (c) Executive resigns within 65 days following the initial occurrence of the diminution.

In the event of a termination without Cause or for Good Reason, Executive shall receive from the Company his/her Base Salary under Section 2.1 and employee benefits under Section 2.4 through the Termination Date and shall be eligible to receive the benefits described in Sections 3.3 below (collectively, “Severance Pay”), subject to the requirements set forth in Section 3.6 and Section 3.7. The period over which the amounts in Section 3.3(a) are payable is referred to as the “Severance Period.”

If Executive’s employment hereunder is terminated by the Company without Cause or by the Executive for Good Reason, the Company will provide the following compensation and benefits to Executive:

(a)Payment of Executive’s then current Base Salary, less applicable withholdings, for 12 months. This amount will be paid in equal installments on each regularly scheduled payroll pay date during the 12 month period that begins on the Termination Date, subject to Section 3.6.

(b)The pro rata portion of the target annual bonus and the Supplemental Savings Plan benefits earned through the Termination Date. Such amounts will be paid when all other Company

executives receive such payments, but in no event later than March 15 of the year following the Termination Date.

(c)Provided that Executive timely elects continuation of group health plan coverage under the Consolidated Omnibus Budget Reconciliation Act of 1986, as amended (“COBRA”), the Company will provide a COBRA premium subsidy through the Severance Period (“COBRA Premium Subsidy”). The amount of the COBRA Premium Subsidy will be equal to cost of such COBRA benefits minus the cost the Executive would pay for such benefits if the Executive were an active employee. During the Severance Period, Executive will be required to pay only the unsubsidized portion of the COBRA premium (i.e., the active employee rate for such coverage). To qualify Executive for the COBRA Premium Subsidy, Executive must timely pay the applicable

unsubsidized COBRA premiums required to maintain coverage for Executive, the Executive’s spouse and any eligible dependents under COBRA. It is understood and agreed that the period of time during which Executive is eligible for the COBRA Premium Subsidy shall run concurrent with and be credited toward the continuation coverage period to which Executive would be entitled pursuant to COBRA. Notwithstanding the foregoing, Executive understands and agrees that the Company's obligation to provide the COBRA Premium Subsidy shall cease on the earliest of (i) the end of the Severance Period, (ii) the date on which Executive becomes eligible for group health coverage offered by another employer or (iii) the date on which Executive otherwise ceases to be eligible for COBRA. Executive further understands and agrees that all other provisions of Executive’s (and Executive’s spouse and covered eligible dependents’) COBRA coverage (including, without limitation, any applicable co-payments, deductibles and other out-of-pocket expenses) will be in accordance with the applicable plan in effect for similarly situated active employees, as applicable. Executive also understands and agrees that the amount of the COBRA Premium Subsidy may be included in Executive’s taxable income and subject to applicable tax withholdings and required deductions from any severance payments. After the Severance Period expires, Executive will be required to timely pay the full monthly COBRA premium to continue COBRA coverage for any additional COBRA coverage period for which Executive or Executive’s spouse eligible dependents are eligible.

(d)During the twelve (12) month period immediately following the Termination Date, the Company shall treat Executive as if he/she were a continuing employee for purposes of applying the age and vesting provisions of unvested performance or non-performance-based equity awards, measured from the date of Executive’s termination of employment. For the avoidance of doubt, the vesting and delivery of any such awards that are earned by Executive as a result of such continued vesting credit shall occur at the normally scheduled vesting date as specified in the underlying equity award agreement.

(e)The Company will pay for and/or provide to Executive outplacement services with an outplacement firm of Executive’s choosing, provided that the Company shall not be responsible to pay for such services to the extent such services (aa) exceed $15,000 or (bb) are provided more than one year following the Release Effective Date (as defined below).

Except as otherwise provided under law or the terms of any employee benefit plans in which Executive participates, Executive shall not be entitled to receive any additional compensation or benefits from the Company after the Termination Date except as provided herein. All Severance Pay paid to Executive will be subject to the terms of the Company’s policy for recovering overpayments of incentive compensation in certain circumstances, including a restatement of reported financial or operating results, fraud, or misconduct, in effect from time to time.

3.4Change in Control. If, contemporaneous with or within twelve months after a Change in Control (as defined below), the Executive’s employment is terminated by the Company other than for Cause, or terminated by Executive for Good Reason, Executive will be eligible to receive, in lieu of those payments provided under Section 3.3(a) and (b), as applicable: (a) one and one-quarter (1¼) times Executive’s then

current Base Salary; and (b) an amount equal to Executive’s target annual bonus for the year that includes the Termination Date (together, the “Change in Control Payment”), subject to the requirements set forth in Section 3.6. The Change in Control Payment will be made in a lump sum cash payment as soon as practicable, but in no event more than 30 days after the later of the Release Effective Date (as defined below) or the effective date of the Change in Control. Executive shall also receive full, accelerated vesting credit, on the date of the Release Effective Date (as defined below), for any outstanding unvested, time-vesting equity awards (not performance-based awards) consistent with and subject to the limitations of Section 3.7. In addition, Executive will be eligible for the continued health plan coverage described in Section 3.3(c) and the outplacement services described in Section 3.3(e).

For purposes of this Agreement, a “Change in Control” will occur as of the first day that any one or more of the following conditions is satisfied:

(i)The “beneficial ownership” (as defined in Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) of securities representing 30% or more of the combined voting power of the then outstanding voting securities of the Corporation entitled to vote generally in the election of directors (the “Corporation Voting Securities”) is accumulated, held or acquired by a Person (as defined in Section 3(a)(9) of the Exchange Act, as modified, and used in Sections 13(d) and 14(d) thereof) (other than the Corporation, any trustee or other fiduciary holding securities under an employee benefit plan of the Corporation, holders of capital stock of the Corporation as of the date hereof or an affiliate thereof, any corporation owned, directly or indirectly, by the Corporation’s stockholders in substantially the same proportions as their ownership of stock of the Corporation); provided, however that any acquisition from the Corporation or any acquisition pursuant to a transaction that complies with clauses (A), (B) and (C) of subparagraph (iii) of this paragraph will not be a Change in Control under this subparagraph (i), and provided further, that immediately prior to such accumulation, holding or acquisition, such Person was not a direct or indirect beneficial owner of 25% or more of the Corporation Voting Securities; or

(ii)Within any twelve (12) month period that includes or is after the Start Date, individuals who constitute the Corporation’s Board (the “Incumbent Board”) cease for any reason to constitute at least a majority of the Board; provided, however, that any individual becoming a director subsequent to the date hereof whose election, or nomination for election by the Corporation’s stockholders, was approved by a vote of at least a majority of the directors then comprising the Incumbent Board will be considered as though such individual were a member of the Incumbent Board, but excluding, for this purpose, any such individual whose initial assumption of office occurs as a result of an actual or threatened election contest with respect to the election or removal of directors or other actual or threatened solicitation of proxies or consents by or on behalf of a person other than the Board; or

(iii)Consummation by the Corporation of a reorganization, merger or consolidation, or sale or other disposition of all or substantially all of the assets of the Corporation or the acquisition of assets or stock of another entity (a “Business Combination”), in each case, unless immediately following such Business Combination: (A) more than 60% of the combined voting power of then outstanding voting securities entitled to vote generally in the election of directors of (x) the corporation resulting from such Business Combination (the “Surviving Corporation”), or (y) if applicable, a corporation that as a result of such transaction owns the Corporation or all or substantially all of the Corporation’s assets either directly or through one or more subsidiaries (the ‘‘Parent Corporation”), is represented, directly or indirectly by Corporation Voting Securities outstanding immediately prior to such Business Combination (or, if applicable, is represented by shares into which such Corporation Voting Securities were converted pursuant to such Business Combination), and such voting power among the holders thereof is in substantially the same proportions as their ownership, immediately prior to such Business Combination, of the Corporation Voting Securities; (B) no Person (excluding any employee benefit plan (or related trust)

of the Corporation or such corporation resulting from such Business Combination) beneficially owns, directly or indirectly, 20% or more of the combined voting power of the then outstanding voting securities eligible to elect directors of the Parent Corporation (or, if there is no Parent Corporation, the Surviving Corporation) except to the extent that such ownership of the Corporation existed prior to the Business Combination; and (C) at least a majority of the members of the board of directors of the Parent Corporation (or, if there is no Parent Corporation, the Surviving Corporation) were members of the Incumbent Board at the time of the execution of the initial agreement, or of the action of the Board, providing for such Business Combination; or

(iv)Approval by the Corporation’s stockholders of a complete liquidation or dissolution of the Corporation.

However, in no event will a Change in Control be deemed to have occurred with respect to Executive if Executive is part of a purchasing group that consummates the Change in Control transaction. Executive

will be deemed “part of a purchasing group” for purposes of the preceding sentence if Executive is an equity participant in the purchasing company or group (except: (a) passive ownership of less than two percent of the stock of the purchasing company; or (b) ownership of equity participation in the purchasing company or group that is otherwise not significant, as determined prior to the Change in Control by a majority of the nonemployee continuing Directors; provided that, for purposes of the foregoing, participation as a management investor in such purchasing company will not be deemed to be within the exceptions provided for in (a) and (b)).

Notwithstanding anything to t h e contrary, a Change in Control will have occurred only if such Change in Control constitutes a change in control under Section 409A of the Internal Revenue Code of 1986, as amended (the “Code”), and the regulations and other guidance in effect thereunder (“Section 409A”).

3.5. Non-Renewal. For the avoidance of doubt, either party’s provision of written notice to the other party of intent not to renew this Agreement and the subsequent termination of the Agreement by expiration pursuant to Section 1.1, above, shall not be deemed a termination without Cause under Section 3.3, and in such a case, Executive shall be entitled to receive no compensation or benefits from the Company after expiration of this Agreement in accordance with its terms, except as otherwise provided in this paragraph, under law, or the terms of any employee benefit plans in which Executive participates. Notwithstanding the foregoing, in the event the Company elects not to renew the Agreement and Executive’s employment is terminated without Cause (or Executive terminates his/her employment for Good Reason, as set forth in Section 3.3) within twelve (12) months immediately following the end of the Employment Term, as defined in this Agreement, then during the remaining period of vesting associated with any outstanding equity awards, Company shall treat Executive as if he/she were a continuing employee for purposes of applying the vesting provisions of all unvested performance or non-performance based equity awards, measured from the date of Executive’s termination of employment, subject to the requirements set forth in Section 3.6. For the avoidance of doubt, the vesting and delivery of any such awards that are earned by Executive as a result of such continued vesting credit shall occur at the normally scheduled vesting date as specified in the underlying equity award agreement.

3.6Execution of Separation Agreement. As a condition to receiving the Severance Pay or the Change in Control Payment set forth in Section 3.3 or Section 3.4, respectively, Executive must execute and return to the Company, and not revoke any part of, a separation agreement containing a general release and waiver of claims against the Company and its respective officers, directors, stockholders, employees and affiliates with respect to Executive’s employment, and other customary terms, in a form and substance reasonably acceptable to the Company and in conformity with applicable laws and regulations then in effect. The Company shall deliver to Executive such release within ten (10) days following Executive’s termination of employment and Executive shall deliver an original, signed release to the Company within twenty-one (21) days of receipt thereof (or such longer period as may be required by applicable law to constitute an effective release of all claims, but no longer than 45 days after the after receipt of the same

from the Company) (the “Release Deadline”). Notwithstanding anything in this Agreement to the contrary, no payments pursuant to Section 3.3 or Section 3.4 shall be made prior to the date that both (a) Executive has delivered an original, signed release to the Company and (b) the revocability period (if any) has elapsed without Executive having exercised Executive’s revocation rights (the “Release Effective Date”). Any payments that would otherwise be made hereunder during the first sixty (60) days following Executive’s Termination Date will be made on the 65th day following Executive’s Termination Date termination of employment. If Executive does not deliver an original, signed release to the Company by the Release Deadline, (i) Executive’s rights shall be limited to those made available to Executive under Section 3.1 above, and (ii) the Company shall have no obligation to pay or provide to Executive any amount or benefits described in Section 3.3 or Section 3.4, or any other monies on account of the termination of Executive’s employment. Any obligation of the Company to provide the Severance Pay shall cease: (A) upon Executive’s death; (B) if Executive materially breached or breaches Executive’s contractual obligations to the Company, including those set forth in Article IV or Article V herein, or in the release agreement; or

(C) if, after Executive’s termination, the Company discovers facts and circumstances that would have justified a termination for Cause (“Disqualifying Conduct”); provided, however, that upon any subsequent

determination that there was no Disqualifying Conduct, the Company shall immediately pay any unpaid Severance Pay or Change in Control Payment as contemplated in Section 3.3 or Section 3.4.

3.7Section 409A. While the parties acknowledge that any payments and benefits provided under Article III of this Agreement are intended to be exempt from Section 409A, to the extent (a) further guidance or interpretation is issued by the IRS after the date of this Agreement which would indicate that the payments do not qualify for such exemption or the amount of payments due under Article III increases in a manner to cause certain payments to exceed the limitation available for exempt separation payments and (b) Executive is a “specified employee” within the meaning of Code Section 409A(a)(2)(B)(i) upon the date of Executive’s termination of employment, such payments or benefits which are not exempt and would otherwise be payable to Executive prior to the date that is six (6) months following the date of Executive’s separation from service (within the meaning of Section 409A) shall be delayed and instead shall be paid to Executive on the first regular payroll date that occurs after the six (6) month anniversary of Executive’s separation from service (within the meaning of Section 409A). For purposes of Section 409A, each installment of the Severance Pay under Article III shall be treated as a right to a separate payment.

3.8Excess Parachute Payments. Notwithstanding any provision of this Agreement to the contrary, if any amount or benefit to be paid or provided under this Agreement, individually or together, would be an “Excess Parachute Payment” within the meaning of Code Section 280G but for the application of this sentence, then the payments and benefits to be paid or provided under this Agreement will be reduced to the minimum extent necessary (but in no event to less than zero) so that no portion of any such payments or benefits, as so reduced, constitutes an Excess Parachute Payment; provided, however, that the foregoing reduction will be made only if and to the extent that such reduction would result in an increase in the aggregate payments and benefits to be provided to Executive, determined on an after-tax basis (taking into account the excise tax imposed pursuant to Code Section 4999, any tax imposed by any comparable provision of state law, and any applicable federal, state and local income and employment taxes).

The fact that Executive’s right to payments or benefits may be reduced by reason of the limitations contained in this Section 3.8 will not of itself limit or otherwise affect any other rights of Executive other than pursuant to this Agreement. In the event that any payment or benefit intended to be provided under this Agreement is required to be reduced pursuant to this Section 3.8, the reduction shall be made in the following order: (a) first reducing, if any, those payments or benefits which have a higher Parachute Value than actual present value, (b) then, to the extent necessary, reducing cash payments or benefits; and (c) then, to the extent necessary, reducing those payments or benefits having the next highest ratio of Parachute Value to actual present value of such payments or benefits as of the date of the change of control (as defined under Code Section 280G). For purposes of this Section 3.8, present value shall be determined in accordance with Section 280G(d)(4) of the Code. For purposes of this Section 3.8, the “Parachute Value” of a payment or benefit means the present value as of the date of the change of control of the portion of

such payment that constitutes a “parachute payment” under Section 280G(b)(2) of the Code, as valued in accordance with Section 280G of the Code any interpretive guidance thereunder.

3.9Removal from any Boards and Positions. If Executive’s employment is terminated for any reason under this Agreement, Executive will, immediately upon Executive’s termination of employment, be deemed to have resigned from (a) if a member, the Board as well as the board of directors of any Company entity or any other board to which Executive has been appointed or nominated by or on behalf of the Company, (b) any position with the Company or any Company entity, including, but not limited to, as an officer of the Company or any Company entity, and (c) any fiduciary positions with respect to the Company’s benefit plans. In addition, and as a condition to receiving the Severance Pay described in Section 3.3 or the Change in Control Payment described in Section 3.4, Executive shall take any and all necessary steps to effectuate Executive’s resignation from such positions.

ARTICLE IV

EXCLUSIVITY OF SERVICES AND RESTRICTIVE COVENANTS

4.1Confidential Information. The Company will provide Executive with access to and use of the Company’s Confidential Information (as defined below) in the course and scope of Executive’s employment. Executive acknowledges and agrees that the Confidential Information (as defined below) of the Company (as defined above) and Company subsidiaries and any other entity related to the Company entities (each, a “GLDD Entity”) that Executive obtains during Executive’s employment by the Company is the property of the Company or such other GLDD Entity and that the Company has the need and the right to protect the Confidential Information. Executive agrees that, except as expressly authorized in connection with Executive’s employment hereunder, Executive will never, directly or indirectly, disclose, publish or use any Confidential Information of which Executive has become aware, whether or not such information was developed by Executive. All duties and obligations set forth in this Agreement regarding Confidential Information shall be in addition to those which exist under the Texas Uniform Trade Secrets Act and other applicable state and federal statutory law and common law.

As used in this Agreement, “Confidential Information” means information that is not generally known to the public and that was or is used, developed, or obtained by the Company or any other GLDD Entity, in connection with their respective businesses, including but not limited to:

i.products or services, anticipated or unannounced products or services, product or service development information (or other proprietary product or service information);

ii.fees, costs, bids and pricing structures and quotations or proposals given to agents, customers, sureties, suppliers, or prospective customers, agents, sureties or suppliers, or received from any such person or entity;

iii.accounting or financial records;

iv.strategic business plans;

v.information system applications or strategies;

vi.customer and vendor lists and employee lists and directories;

vii.marketing plans, bidding strategies and processes, and negotiation strategies, whether past, current, or future;

viii.accounting and business methods;

ix.legal advice and/or attorney work product;

x.trade secrets and other proprietary information;

xi.information, analysis or strategies regarding acquisitions, mergers, other business combinations, divestitures, recapitalizations, or new ventures; and

xii.nonpublic information that was acquired by Executive concerning the requirements and specifications of the Company’s or any other GLDD Entity’s agents, vendors, contractors, customers, or potential customers.

Notwithstanding anything to the contrary, Confidential Information does not include any information that: (a) is publicly disclosed by law or pursuant to, and to the extent required by, an order of a court of competent jurisdiction or governmental agency; (b) becomes publicly available through no fault of Executive or another person acting in breach of contractual or other legal obligations; or (c) has been published in a form generally available to the public before Executive proposes to disclose, publish, or use such information.

Defend Trade Secrets Act (DTSA) Notice: Pursuant to 18 USC § 1833(b), an individual may not be held criminally or civilly liable under any federal or state trade secret law for disclosure of a trade secret:

(i) made in confidence to a government official, either directly or indirectly, or to an attorney, solely for the purpose of reporting or investigating a suspected violation of law; and/or (ii) in a complaint or other document filed in a lawsuit or other proceeding, if such filing is made under seal. Additionally, an individual suing an employer for retaliation based on the reporting of a suspected violation of law may disclose a trade secret to his or her attorney and use the trade secret information in the court proceeding, so long as any document containing the trade secret is filed under seal and the individual does not disclose the trade secret except pursuant to court order.

4.2Noncompetition. During the Employment Term, during any employment following expiration of the Employment Term pursuant to Section 1.1, and for the twelve (12) month period immediately following the termination of Executive’s employment with the Company for any reason (the “Restricted Period”), Executive will not, on behalf of him/herself or any other entity, have an ownership interest in, become employed or engaged by, provide services as an independent contractor or advisor, or otherwise participate in or render services to, any business or enterprise (including, without limitation, any division, group or franchise of a larger organization) within the Geographical Area (as defined below) that engages in any dredging, land reclamation, subsea rock installation or dredging associated with offshore wind development projects, or any other business engaged in by the Company; provided, however, that this restriction shall not apply to employment with an entity that offers or has plans to offer work or services associated with offshore wind development projects that are not offered by the Company (or which the Company has plans to offer), and it shall not prohibit Executive from passive beneficial ownership of less than three percent of any class of securities of a publicly-held corporation whose stock is traded on a U.S. national securities exchange or traded in the over-the-counter market. For purposes of this provision, Executive acknowledges that the Company’s business is global and involve customers around the world, and “Geographical Area” means any country or geographic region where the Company has conducted any dredging, land reclamation, subsea rock installation and dredging associated with offshore wind development projects or any other business subsea rock installation or dredging associated with offshore wind development projects, or other business during the eighteen (18) month period immediately preceding the Termination Date. Notwithstanding anything in this Article IV to the contrary, Executive may, at any time during the Restricted Period, provide written notice to the Company that (i) describes a particular business or employment opportunity that Executive is interested in pursuing or in which Executive may wish to engage, and (ii) request that the Company agree that the opportunity so described would not violate this Section 4.2. Within a reasonable time, the Company will send Executive a written response, indicating whether or not the Company consents to Executive engaging in the opportunity described in Executive’s notice, with or without restrictions.

4.3Non-Solicitation. During the Restricted Period, Executive shall not (other than in furtherance of Executive’s legitimate job duties on behalf of Company), directly or indirectly, on Executive’s own behalf or for any other person or entity: (a) solicit for employment, hire or engage, or attempt to solicit for employment, hire or engage, any person who is or was employed by a GLDD Entity

within the six (6) month period prior to the solicitation, hire or engagement, or (b) otherwise interfere with the relationship between any such person and the GLDD Entity.

4.4Non-Interference with Business Relationships. During the Restricted Period, Executive shall not (other than in furtherance of Executive’s legitimate job duties on behalf of the Company), directly or indirectly, on Executive’s own behalf or for any other person or entity: (a) solicit, for a purpose related to a competitive activity (i.e., an activity prohibited by Section 4.2), any customer, vendor or agent of the GLDD Entity that was doing business with the GLDD Entity during the six month period prior to the solicitation; or (b) induce, or attempt to induce, any customer, vendor or agent of the GLDD Entity to reduce or cease doing business with theGLDD Entity, or otherwise interfere with the relationship between such entity and the GLDD Entity.

4.5Equitable Modification. If any court of competent jurisdiction shall deem any provision in this Article IV too restrictive, the other provisions shall stand, and the court shall modify the unduly restrictive provision to the point of greatest restriction permissible by law.

4.6Remedies. Executive acknowledges that the agreements and covenants contained in this Article IV are essential to protect the GLDD Entities and their business and are a condition precedent to

entering into this Agreement. Should Executive breach any covenant in this Article IV, then among other remedies, the duration of the covenant shall be extended by the period of any such breach. Executive agrees that irreparable harm would result from Executive’s breach or threat to breach any provision of this Article IV, and that monetary damages alone would not provide adequate relief to the Company for the harm incurred. Executive agrees that in addition to money damages, the Company shall be entitled to issuance of temporary, preliminary, and permanent injunctive relief restraining Executive from committing or continuing any breach without being required to post a bond. Without limiting the foregoing, upon a breach by Executive of any provision of this Article IV, any outstanding Severance Pay shall cease and be forfeited, and Executive shall immediately reimburse the Company for any Severance Pay previously paid.

ARTICLE V

POST-TERMINATION OBLIGATIONS

5.1Return of Company Materials. No later than the Termination Date (when advance notice of termination has been provided) or (3) business days following the termination of Executive’s employment (when no advance notice is provided or termination is for Cause), Executive shall return to the Company all Company property that is then in Executive’s possession, custody or control, including, without limitation, all keys, access cards, credit cards, computer hardware and software, documents, records, policies, marketing information, design information, specifications and plans, data base information and lists, and any other property or information that Executive has or had relating to any GLDD Entities (whether those materials are in paper or computer-stored form), and including but not limited to any documents containing, summarizing, or describing any Confidential Information. Executive shall be entitled to retain Executive’s cellular telephone and cellular telephone number.

5.2 Employee Assistance. During Executive’s employment with the Company and any Severance Period, Executive shall, upon reasonable notice, furnish the Company with such information as may be in Executive’s possession or control, and cooperate with the Company in any reasonable manner that the Company may request, including without limitation (i) conferring with the Company with regard to any litigation, claim, or other dispute in which the Company is or may become a party (other than a dispute between Executive and the Company arising out of this Agreement) and (ii) providing the Company with access to Executive’s cellular phone and/or other electronic equipment for the purposes of any investigation into work-related matters. The Company shall reimburse Executive for all reasonable, approved out-of-pocket expenses incurred by Executive in fulfilling Executive’s obligations under this Section 5.2. The Company will make any such reimbursement within 30 days of the date Executive

provides the Company with documentary evidence of such expense consistent with the policies of the Company. Notwithstanding anything to the contrary, any such reimbursement shall be administered so as to comply with Treasury Regulation Section 1.409A-3(i)(1)(iv).

ARTICLE VI

MISCELLANEOUS

6.1Notices. Any notices, consents or other communications required or permitted to be sent or given hereunder shall be in writing and must be: (a) delivered personally, in which case the date of such notice shall be the date of delivery; (b) delivered to a nationally recognized overnight courier service, in which case the date of delivery shall be the next business day; or (c) sent by facsimile transmission (with a copy sent by first-class mail), in which case the date of delivery shall be the date of transmission, or if after 5:00 P.M., the next business day. If not personally delivered, notice must be sent as designated below:

If to Executive, to the address listed on the signature page hereto or the last address on file for Executive in the records of the Company.

If to the Company:

Great Lakes Dredge & Dock Corporation 9811 Katy Freeway, Suite 1200

Houston, Texas 77024

Attn: Chief Executive Officer fax:

telephone:

with a copy to:

Great Lakes Dredge & Dock Corporation 9811 Katy Freeway, Suite 1200

Houston, Texas 77024

Attn: Chief Human Resources & Administrative Officer fax:

telephone:

and

Great Lakes Dredge & Dock Corporation 9811 Katy Freeway, Suite 1200

Houston, Texas 77024 Attn: Chief Legal Officer fax:

telephone:

or such other address as may hereafter be specified by written notice given by either party to the other party. Executive shall promptly notify the Company of any change in Executive’s address set forth on the signature page.

6.2Company Stock Retention. Executive shall be subject to the Company’s stock retention guidelines and policies in effect from time-to-time.

6.3Withholding. The Company may withhold from any payment it is required to make under this Agreement amounts sufficient to satisfy applicable withholding requirements under any federal, state, or local law, or any other amounts due and owing to the Company from Executive.

6.4Successors and Assigns. This Agreement shall not be assignable by Executive without the Company’s written consent. Subject to Section 4, the Company may unilaterally assign this Agreement to any successor employer or corporation or entity that purchases substantially all of the assets of or succeeds to the business of the Company. Subject to the foregoing, this Agreement shall be binding upon and inure to the benefit of the parties hereto and their respective heirs, personal representatives, successors, and assigns.

6.5Third Party Beneficiary. Each of the GLDD Entities is a third party beneficiary of this

Agreement, is entitled to the rights and benefits of the Company hereunder, and may enforce the provisions of this Agreement as if it were a party thereto.

6.6No Waiver. No failure or delay by the Company or Executive in enforcing or exercising any right or remedy hereunder will operate as a waiver thereof or a waiver of any other right hereunder. No modification, amendment or waiver of this Agreement or consent to any departure by Executive from any of the terms or conditions thereof, will be effective unless in writing and signed by the Chief Executive Officer of the Company. Any such waiver or consent will be effective only in the specific instance and for the purpose for which given.

6.7Severability; Survivability. If any term or provision of this Agreement shall be held to be invalid or unenforceable, the remaining terms and provisions hereof shall be treated as independent obligations, shall not be affected thereby, and shall be enforced to the fullest extent permitted under law. Executive’s obligations in Articles IV and V, and the Company’s obligations in Article III, shall survive and continue in full force notwithstanding the termination of this Agreement or Executive’s employment for any reason.

6.8Execution in Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be considered an original instrument, but all of which shall be considered one and the same agreement.

6.9Governing Law; Waiver of Jury. This Agreement shall be governed by and construed in accordance with the internal laws of the State of Texas, without regard to its conflict of law principles. For the purposes of any suit, action, or other proceeding arising out of this Agreement or with respect to Executive’s employment hereunder, except with respect to a party seeking to obtain only injunctive relief for violation or threatened violation of this Agreement, the parties: (a) agree to submit disputes to arbitration as set forth in Section 6.11; and (b) waive their respective rights to a jury trial of any claims and causes of action. With respect to claims for injunctive relief which are excluded from Section 6.11, Executive and the Company irrevocably submit to the jurisdiction of the courts in Harris County, Texas.

6.10Construction. The language used in this Agreement will be deemed to be the language chosen by Executive and the Company to express their mutual intent, and no rule of strict construction will be applied against Executive or the Company. The heading in this Agreement are for convenience of reference only and will not limit or otherwise affect the meaning of the provision.

6.11Entire Agreement; Amendments. This Agreement contains the entire understanding of the parties hereto with regard to the subject matter contained herein, and supersedes all prior agreements, understandings, or letters of intent with regard to the subject matter contained herein between the parties hereto, unless otherwise specified herein. This Agreement shall not be amended, modified, or supplemented except by a written instrument signed by each of the parties hereto.

6.12ARBITRATION OF DISPUTES. EXCEPT AS PROVIDED IN SECTION 6.9 ABOVE, ANY CONTROVERSY OR CLAIM ARISING OUT OF OR RELATING TO THIS CONTRACT, OR THE BREACH THEREOF, SHALL BE SETTLED BY ARBITRATION ADMINISTERED BY THE AMERICAN ARBITRATION ASSOCIATION IN ACCORDANCE WITH ITS EMPLOYMENT ARBITRATION RULES AND MEDIATION PROCEDURES INCLUDING THE OPTIONAL RULES FOR EMERGENCY MEASURES OF PROTECTION. THE CONTROVERSY SHALL BE SUBMITTED TO ONE ARBITRATOR, EACH PARTY MAY STRIKE OR REJECT UP TO THREE POTENTIAL ARBITRATORS WITH THE SELECTIONS ALTERNATING BETWEEN THE COMPANY AND THE PARTY AND SELECTED FROM THE ROSTER OF ARBITRATORS OF THE AMERICAN ARBITRATION ASSOCIATION. THE PLACE OF ARBITRATION SHALL BE THE COUNTY IN WHICH THE PRINCIPAL CORPORATE OFFICES OF THE COMPANY ARE LOCATED. JUDGMENT ON THE AWARD RENDERED BY THE ARBITRATOR MAY BE ENTERED IN ANY COURT HAVING JURISDICTION THEREOF. THE DECISION OF THE ARBITRATOR SHALL BE FINAL AND BINDING ON THE PARTIES.

[SIGNATURE PAGE TO EMPLOYMENT AGREEMENT]

IN WITNESS WHEREOF, each of the parties hereto has duly executed this Employment Agreement as of the date first set forth above.

Great Lakes Dredge & Dock Corporation
By:	/s/ Lasse J. Petterson
	Chief Executive Officer

/s/ Eleni Beyko

Eleni Beyko

22835223.3

EX-21.1

Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT

Name	Jurisdiction of Incorporation
Great Lakes Dredge & Dock Company, LLC	Delaware
Great Lakes U.S. Fleet Management, LLC	Delaware
Great Lakes Environmental & Infrastructure Solutions, LLC	Delaware
Great Lakes Dredge & Dock do Brasil Ltda.	Brazil
Great Lakes Dredge & Dock (Bahamas) Ltd.	Bahamas
Great Lakes Dredge & Dock (UK) Limited	United Kingdom
NASDI Holdings, LLC	Delaware
Terra Contracting Services, LLC	Delaware
Terra Fluid Management, LLC	Delaware
Drews Services LLC	South Carolina

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-153207 on Form S-3 and Registration Statement Nos. 333-150067, 333-256955, 333-185350 and 333-218242 on Form S-8 of our reports dated February 16, 2024, relating to the financial statements of Great Lakes Dredge & Dock Corporation and the effectiveness of Great Lakes Dredge & Dock Corporation's internal control over financial reporting appearing in this Annual Report on Form 10-K for the year ended December 31, 2023.

/s/ Deloitte & Touche LLP

Chicago, Illinois

February 16, 2024

EX-31.1

Exhibit 31.1

CERTIFICATIONS PURSUANT TO

SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

CERTIFICATION

I, Lasse J. Petterson, certify that:

1.I have reviewed this annual report on Form 10-K of Great Lakes Dredge & Dock Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 16, 2024

/s/ LASSE J. PETTERSON

Lasse J. Petterson

President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS PURSUANT TO

SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

CERTIFICATION

I, Scott Kornblau, certify that:

1.I have reviewed this annual report on Form 10-K of Great Lakes Dredge & Dock Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 16, 2024

/s/ SCOTT KORNBLAU

Scott Kornblau

Senior Vice President, Chief Financial Officer and Treasurer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Great Lakes Dredge & Dock Corporation (the “Company”) on Form 10-K for the year ended December 31, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Lasse J. Petterson, President and Chief Executive Officer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by Great Lakes Dredge & Dock Corporation for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

/s/ LASSE J. PETTERSON

Lasse J. Petterson

President and Chief Executive Officer

Date: February 16, 2024

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Great Lakes Dredge & Dock Corporation and will be retained by Great Lakes Dredge & Dock Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Great Lakes Dredge & Dock Corporation (the “Company”) on Form 10-K for the year ended December 31, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Scott Kornblau, Senior Vice President and Chief Financial Officer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by Great Lakes Dredge & Dock Corporation for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

/s/ SCOTT KORNBLAU

Scott Kornblau

Senior Vice President, Chief Financial Officer and Treasurer

Date: February 16, 2024

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Great Lakes Dredge & Dock Corporation and will be retained by Great Lakes Dredge & Dock Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-97

Exhibit 97

 

GREAT LAKES DREDGE & DOCK CORPORATION

STATEMENT OF POLICY REGARDING
INCENTIVE COMPENSATION RECOUPMENT

Overview. This Policy Statement has been adopted by the Board of Directors of Great Lakes Dredge & Dock Corporation, a Delaware corporation (the “Company”). The Company has adopted this incentive compensation recoupment policy (the “Policy”) in order to ensure that Incentive Compensation (as defined below) is paid based on accurate financial data. Under the circumstances described below, the Company may seek to recover Incentive Compensation that would have not been paid if the correct performance data had been used to determine the amount payable. The Compensation Committee of the Board of Directors of Great Lakes Dredge & Dock Corporation (the “Committee”) shall have full authority to interpret and enforce the Policy and may recommend that the Board of Directors take action with respect to the Policy. The Policy shall apply to all Incentive Compensation awarded to Covered Employees regardless of individual fault, and is in addition to the requirements of Section 304 of the Sarbanes-Oxley Act of 2002. The Board or Committee may amend this Policy at any time in its discretion. This Policy shall be interpreted to comply with the requirements of U.S. Securities and Exchange Commission (“SEC”) rules and Nasdaq Stock Market (“Nasdaq”) listing standards implementing Section 954 of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (the “Dodd-Frank Act”) and, to the extent this Policy is in any manner deemed inconsistent with such rules, this Policy shall be treated as retroactively amended to be compliant with such rules.

Covered Employees. The Policy applies to the following (each a “Covered Employee”): (i) the current and former “executive officers” of Great Lakes Dredge & Dock Corporation, as determined from time to time pursuant to Rule 10D-1 under the Securities Exchange Act of 1934, as amended (each such individual, an “Executive”), and (ii) any other employee of the Company or any “affiliate,” as defined in Rule 12b-2 under the Securities Exchange Act of 1934 (an “Affiliate”), designated by the Board or the Committee from time to time by notice to the employee.

Incentive Compensation. For purposes of this Policy, “Incentive Compensation” means, with respect to each Covered Employee: (i) in the case of a Financial Restatement (as defined below) all compensation granted, earned or vested based wholly or in part upon the attainment of any financial reporting measure determined and presented in accordance with the accounting principles used in preparing the Company’s financial statements, and any measure that is derived wholly or in part from such measures, whether or not presented within the Company’s financial statements or included in a filing with the SEC, including stock price and total shareholder return (“TSR”), including but not limited to performance-based cash, stock, options or other equity-based awards paid or granted to the Covered Employee, and (ii) in cases of fraud or misconduct, the gain realized by any Covered Employee engaged in such conduct on the exercise of stock options or

stock appreciation rights, the vesting of other incentive awards or the sale of Company stock acquired through any incentive award.

Triggering Events; Calculation of Overpayment. If the Committee determines that Incentive Compensation was overpaid, in whole or in part, as a result of (i) an accounting restatement due to the material noncompliance of the Company with any financial reporting requirement under the securities laws, including any required accounting restatement to correct an error in previously issued financial statements that is material to the previously issued financial statements, or that would result in a material misstatement if the error were corrected in the current period or left uncorrected in the current period (a “Financial Restatement”), or (ii) any conduct justifying termination for cause under the Company’s Code of Business Conduct and Ethics or the applicable Covered Employee’s employment agreement, or constituting a violation of a restrictive covenant in an employment or severance agreement, or other act involving dishonesty, fraud, illegality or moral turpitude (whether or not requiring a Financial Restatement), the Committee will review the Incentive Compensation received by the applicable Covered Employees.

In the event of (i) a Financial Restatement, the Committee will seek to recover from or cancel with respect to each Executive, and may seek to recover from or cancel with respect to each other Covered Employee, in each case as promptly as reasonably possible, the excess of (a) the Incentive Compensation received by the Executive during the Recovery Period (as defined below) based on the erroneous data and calculated without regard to any taxes paid or withheld, over (b) the Incentive Compensation that would have been received by the Executive had it been calculated based on the restated financial information, as determined by the Committee; and (ii) other misconduct, to the extent practicable and in the best interests of stockholders, and as permitted by applicable law, provided that such misconduct was harmful to the Company or an Affiliate, the Committee may seek to recover or cancel the Incentive Compensation paid, awarded or accrued after the applicable misconduct or any severance paid after termination of employment (in each such case, the “Overpayment”).

For Incentive Compensation based on stock price or TSR, where the amount of erroneously awarded compensation is not subject to mathematical recalculation directly from the information in the Financial Restatement, then the Committee shall determine the amount to be recovered based on a reasonable estimate of the effect of the Financial Restatement on the stock price or TSR upon which the Incentive Compensation was received and the Company shall document the determination of that estimate and provide it to Nasdaq.

Forms of Recovery. The Company may use any legal or equitable remedies that are available to the Company to recoup any Overpayment, including but not limited to by collecting from the Covered Employee cash payments or shares of Company common stock from, or by forfeiting any amounts that the Company owes to, the Covered Employee.

Time Period for Overpayment Review. In the event of a Financial Restatement, and for purposes of determining any related Overpayment, “Recovery Period” means the three completed fiscal years immediately preceding the date on which the Company is required to prepare the Financial Restatement, as determined in accordance with the second sentence of this paragraph, or any transition period that results from a change in the Company’s fiscal year (as set forth in Section 5608(b)(i)(D) of the Nasdaq Listing Rules). The date on which the Company is required to prepare

2

a Financial Restatement is the earlier to occur of (A) the date the Board or a Board committee (or authorized officers of the Company if Board action is not required) concludes, or reasonably should have concluded, that the Company is required to prepare a Financial Restatement or (B) the date a court, regulator or other legally authorized body directs the Company to prepare a Financial Restatement. In the event that the Committee determines that any Covered Employee engaged in fraud or misconduct, the Committee shall be entitled to determine the Overpayment with respect to such Covered Employee for a period of six years after the act of fraud or misconduct is discovered.

Incentive Compensation is considered to have been received by a Covered Employee in the fiscal year during which the applicable financial reporting measure was attained or purportedly attained, even if the payment or grant of such Incentive Compensation occurs after the end of that period.

No Additional Payments. In no event shall the Company be required to award Covered Employees an additional payment if the restated or accurate financial results would have resulted in a higher incentive compensation payment.

Exceptions. The compensation to be recouped under this Policy in the event of a Financial Restatement shall not include Incentive Compensation received by a Covered Employee (i) prior to beginning service as an Executive, or (ii) if he or she did not serve as an Executive at any time during the performance period applicable to the Incentive Compensation in question. The Committee or a majority of independent directors serving on the Board may determine not to seek recovery from a Covered Employee in whole or part to the extent it determines in its sole discretion that such recovery would be impracticable because (A) the direct expense paid to a third party to assist in enforcing recovery would exceed the recoverable amount (after having made a reasonable attempt to recover the erroneously awarded Incentive Compensation and providing corresponding documentation of such attempt to Nasdaq), (B) recovery would violate the home country law that was adopted prior to November 28, 2022, as determined by an opinion of counsel licensed in the applicable jurisdiction that is acceptable to and provided to Nasdaq or (C) recovery would likely cause the Company’s 401(k) plan or any other tax-qualified retirement plan to fail to meet the requirements of Section 401(a)(13) or Section 411(a) of the Internal Revenue Code of 1986, as amended, and the regulations thereunder.

Applicability. This Policy applies to all Incentive Compensation received on or after October 2, 2023, whether paid or granted prior to the adoption of the Policy, except to the extent prohibited by applicable law or any other legal obligation of the Company or Affiliate, as the case may be. Compensation received prior to October 2, 2023 shall remain subject to the Policy then in effect. Application of the Policy does not preclude the Company from taking any other action (including termination of employment or institution of civil or criminal proceedings) to enforce a Covered Employee’s obligations to the Company, whether arising under applicable law (including pursuant to Section 304 of the Sarbanes-Oxley Act of 2002), regulation or pursuant to the terms of any other policy of the Company, employment agreement, equity award, cash incentive award or other agreement applicable to a Covered Employee. Notwithstanding the foregoing, there shall be no duplication of recovery of the same Overpayment under this Policy and any other such rights or remedies.

3

Committee Determination Final. Any determination by the Committee (or by any officer of the Company or an Affiliate to whom enforcement authority has been delegated) or the Board of Directors with respect to this Policy shall be final, conclusive and binding on all interested parties, including all Covered Employees and their beneficiaries, executors, administrators and other legal representatives.

Disclosure. This Policy shall be filed as an exhibit with the Company’s annual report on Form 10-K to the extent required by and in accordance with SEC rules and shall be disclosed in Great Lakes Dredge & Dock Corporation’s applicable filings with the Securities Exchange Commission discussing executive compensation subject hereto.

No Indemnification. The Company shall not indemnify any Covered Employee or pay or reimburse the premium for any insurance policy to cover any losses incurred by such Covered Employee under this Policy or any claims relating to the Company’s enforcement of rights under this Policy.

Acknowledgment. The Company shall provide notice and seek written acknowledgement of this Policy from each Covered Employee, provided that the failure to provide such notice or obtain such acknowledgement shall have no impact on the applicability or enforceability of this Policy.

4

XML

Document and Entity Information - USD ($)

12 Months Ended

Dec. 31, 2023

Feb. 13, 2024

Jun. 30, 2023

Cover [Abstract]

Document Type

10-K

Amendment Flag

false

Document Period End Date

Dec. 31, 2023

Document Fiscal Year Focus

2023

Document Fiscal Period Focus

FY

Trading Symbol

GLDD

Entity Registrant Name

Great Lakes Dredge & Dock Corporation

Entity Central Index Key

0001372020

Current Fiscal Year End Date

--12-31

Entity Filer Category

Accelerated Filer

ICFR Auditor Attestation Flag

true

Entity Shell Company

false

Entity Small Business

false

Entity Emerging Growth Company

false

Entity Address, Address Line One

9811 Katy Freeway

Entity Address, Address Line Two

Suite 1200

Entity Address, City or Town

Houston

Entity Address, State or Province

TX

Entity File Number

001-33225

Entity Tax Identification Number

20-5336063

City Area Code

346

Local Phone Number

359-1010

Entity Address, Postal Zip Code

77024

Entity Interactive Data Current

Yes

Title of 12(b) Security

Common Stock, (Par Value $0.0001)

Security Exchange Name

NASDAQ

Entity Incorporation, State or Country Code

DE

Document Annual Report

true

Document Transition Report

false

Entity Common Stock, Shares Outstanding

66,623,207

Entity Public Float

$ 525,165,618

Entity Voluntary Filers

No

Entity Well-known Seasoned Issuer

No

Entity Current Reporting Status

Yes

Document Financial Statement Error Correction [Flag]

false

Auditor Firm ID

34

Auditor Name

Deloitte & Touche LLP

Auditor Location

Chicago, Illinois

Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

Part of 10-K	Documents Incorporated by Reference
Part III	Portions of the Proxy Statement to be filed with the Securities and Exchange Commission in connection with the 2024 Annual Meeting of Stockholders.

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 22,841	$ 6,546
Accounts receivable—net	54,810	44,890
Contract revenues in excess of billings	68,735	65,922
Inventories	33,912	29,229
Prepaid expenses	1,486	1,568
Other current assets	44,544	34,686
Total current assets	226,328	182,841
PROPERTY AND EQUIPMENT—Net	614,608	543,910
OPERATING LEASE ASSETS	88,398	89,733
GOODWILL	76,576	76,576
INVENTORIES—Noncurrent	86,325	80,044
OTHER	18,605	8,676
TOTAL	1,110,840	981,780
LIABILITIES AND EQUITY
Accounts payable	83,835	94,077
Accrued expenses	37,361	29,469
Operating lease liabilities	28,687	26,873
Billings in excess of contract revenues	29,560	9,914
Total current liabilities	179,443	160,333
LONG-TERM DEBT	412,070	321,521
OPERATING LEASE LIABILITIES—Noncurrent	61,444	65,010
DEFERRED INCOME TAXES	62,232	59,115
OTHER	10,103	7,581
Total liabilities	725,292	613,560
COMMITMENTS AND CONTINGENCIES (Note 12)
EQUITY:
Common stock-$.0001 par value; 90,000 authorized, 66,623 and 66,188 shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively.	6	6
Additional paid-in capital	317,337	312,091
Accumulated retained earnings	70,220	56,314
Accumulated other comprehensive loss	(2,015)	(191)
Total equity	385,548	368,220
TOTAL	$ 1,110,840	$ 981,780

XML

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	66,623,000	66,188,000
Common stock, shares outstanding	66,623,000	66,188,000

XML

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
CONTRACT REVENUES	$ 589,625	$ 648,781	$ 726,149
Revenue, Product and Service [Extensible Enumeration]	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember
COSTS OF CONTRACT REVENUES	$ 511,893	$ 617,608	$ 580,879
Cost, Product and Service [Extensible Enumeration]	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember
Gross profit	$ 77,732	$ 31,173	$ 145,270
OPERATING EXPENSES:
GENERAL AND ADMINISTRATIVE EXPENSES	57,056	51,117	62,134
OTHER (GAINS) LOSSES	(7,543)	7,792	(294)
Total operating income (loss)	28,219	(27,736)	83,430
OTHER EXPENSE:
Interest expense—net	(12,140)	(14,108)	(21,601)
Other income (loss)	2,233	(1,571)	994
Total other expense	(9,907)	(15,679)	(20,607)
INCOME (LOSS) BEFORE INCOME TAXES	18,312	(43,415)	62,823
INCOME TAX (PROVISION) BENEFIT	(4,406)	9,360	(13,391)
NET INCOME (LOSS)	$ 13,906	$ (34,055)	$ 49,432
Basic earnings (loss) per share	$ 0.21	$ (0.52)	$ 0.75
Basic weighted average shares	66,469	66,051	65,587
Diluted earnings (loss) per share	$ 0.21	$ (0.52)	$ 0.75
Diluted weighted average shares	66,957	66,051	66,301

XML

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income (Loss)[Abstract]
Net income (loss)		$ 13,906	$ (34,055)	$ 49,432
Net change in cash flow derivative hedges—net of tax	[1]	(1,824)	(331)	(828)
Comprehensive income (loss)		$ 12,082	$ (34,386)	$ 48,604

[1] Net of income tax benefit of $616, $112 and $280 for the years ended December 31, 2023, 2022 and 2021, respectively.

XML

Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income (Loss)[Abstract]
Net unrealized loss on derivatives, tax	$ 616	$ 112	$ 280

XML

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
BALANCE - value at Dec. 31, 2020	$ 346,668	$ 6	$ 304,757	$ 40,937	$ 968
BALANCE - shares at Dec. 31, 2020		65,023,000
Share-based compensation, value	5,188		5,188
Share-based compensation, shares		35,000
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(3,785)		(3,785)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		431,000
Exercise of stock options and purchases from employee stock purchase plan, value	2,322		2,322
Exercise of stock options and purchases from employee stock purchase plan, shares		257,000
Net income (loss)	49,432			49,432
Other comprehensive income (loss)-net of tax	(828)				(828)
BALANCE - value at Dec. 31, 2021	398,997	$ 6	308,482	90,369	140
BALANCE - shares at Dec. 31, 2021		65,746,000
Share-based compensation, value	4,288		4,288
Share-based compensation, shares		49,000
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(1,827)		(1,827)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		214,000
Exercise of stock options and purchases from employee stock purchase plan, value	1,148		1,148
Exercise of stock options and purchases from employee stock purchase plan, shares		179,000
Net income (loss)	(34,055)			(34,055)
Other comprehensive income (loss)-net of tax	(331)				(331)
BALANCE - value at Dec. 31, 2022	368,220	$ 6	312,091	56,314	(191)
BALANCE - shares at Dec. 31, 2022		66,188,000
Share-based compensation, value	5,231		5,231
Share-based compensation, shares		56,000
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(1,019)		(1,019)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		156,000
Exercise of stock options and purchases from employee stock purchase plan, value	$ 1,034		1,034
Exercise of stock options and purchases from employee stock purchase plan, shares	0	223,000
Net income (loss)	$ 13,906			13,906
Other comprehensive income (loss)-net of tax	(1,824)				(1,824)
BALANCE - value at Dec. 31, 2023	$ 385,548	$ 6	$ 317,337	$ 70,220	$ (2,015)
BALANCE - shares at Dec. 31, 2023		66,623,000

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
OPERATING ACTIVITIES:
Net income (loss)	$ 13,906	$ (34,055)	$ 49,432
Adjustments to reconcile net income (loss) to net cash flows provided by operating activities:
Depreciation expense	42,525	46,273	43,016
Deferred income taxes	3,733	(9,270)	12,311
(Gain) loss on sale of assets	(485)	7,792	(294)
Amortization of deferred financing fees	965	1,299	2,349
Share-based compensation expense	6,316	4,288	5,188
Changes in assets and liabilities:
Accounts receivable	(9,921)	38,064	(43,963)
Contract revenues in excess of billings	(2,813)	(26,078)	(7,738)
Inventories	(11,000)	(14,255)	(2,706)
Prepaid expenses and other current assets	(10,250)	(7,636)	10,873
Accounts payable and accrued expenses	1,376	(1,966)	(698)
Billings in excess of contract revenues	19,647	(4,900)	(17,794)
Other noncurrent assets and liabilities	(6,574)	2,097	(969)
Cash provided by operating activities	47,425	1,653	49,007
INVESTING ACTIVITIES:
Purchases of property and equipment	(150,840)	(143,006)	(116,658)
Proceeds from dispositions of property and equipment	30,699	2,100	4,459
Cash used in investing activities	(120,141)	(140,906)	(112,199)
FINANCING ACTIVITIES:
Repayments of debt			(325,000)
Proceeds from issuance of debt			325,000
Deferred financing fees		(981)	(4,395)
Taxes paid on settlement of vested share awards	(1,019)	(1,827)	(3,785)
Exercise of stock options and purchases from employee stock plans	1,034	1,148	2,321
Borrowings under revolving loans	208,000	10,000
Repayments of revolving loans	(118,000)	(10,000)
Payments on finance lease obligations	(84)
Cash provided by (used in) financing activities	89,931	(1,660)	(5,859)
Net (decrease) increase in cash, cash equivalents and restricted cash	17,215	(140,913)	(69,051)
Cash, cash equivalents and restricted cash at beginning of period	6,546	147,459	216,510
Cash, cash equivalents and restricted cash at end of period	23,761	6,546	147,459
Cash and cash equivalents	22,841	6,546	145,459
Restricted cash included in other long-term assets	920		2,000
Supplemental Cash Flow Information
Cash paid for interest	20,738	17,742	22,919
Cash paid for income taxes	132	1,264	637
Non-cash Investing and Financing Activities
Property and equipment purchased but not yet paid	$ 6,000	$ 8,686	$ 7,010

XML

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pay vs Performance Disclosure
Net Income (Loss)	$ 13,906	$ (34,055)	$ 49,432

XML

Insider Trading Arrangements

12 Months Ended

Dec. 31, 2023

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

Securities Trading Plans of Executive Officers and Directors

Rule 10b5-1 under the Exchange Act provides an affirmative defense that enables pre-arranged transactions in securities in a manner that avoids concerns about initiating transactions at a future date while possibly in possession of material nonpublic information. Our Securities Trading and Disclosure of Confidential Information policy permits our officers and directors to enter into trading plans designed to comply with Rule 10b5-1.

During the quarterly period ended December 31, 2023, none of our officers (as defined in Rule 16a-1(f) under the Exchange Act) or directors adopted or terminated a Rule 10b5-1 trading plan or adopted or terminated a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K).

Rule 10b5-1 Arrangement Adopted

false

Non-Rule 10b5-1 Arrangement Adopted

false

Rule 10b5-1 Arrangement Terminated

false

Non-Rule 10b5-1 Arrangement Terminated

false

XML

Nature of Business and Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Nature of Business and Summary of Significant Accounting Policies

1. NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Organization—Great Lakes Dredge & Dock Corporation and its subsidiaries (the “Company” or “Great Lakes”) are in the business of marine construction, primarily dredging. The Company is the largest provider of dredging services in the United States which is complemented with a long history of performing significant international projects. In addition, the Company is fully engaged in expanding its core business into the rapidly developing offshore wind energy industry. The mobility of the Company’s fleet enables the Company to move equipment in response to changes in demand for dredging services.

Principles of Consolidation and Basis of Presentation—The consolidated financial statements include the accounts of Great Lakes Dredge & Dock Corporation and its majority-owned subsidiaries. All intercompany accounts and transactions are eliminated in consolidation. The equity method of accounting is used for investments in unconsolidated investees in which the Company has significant influence, but not control. Other investments, if any, are carried at cost.

Use of Estimates—The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect certain reported amounts and disclosures. Accordingly, actual results could differ from those estimates.

Revenue and Cost Recognition on Contracts—Revenue is recognized using contract fulfillment costs incurred to date compared to total estimated costs at completion, also known as cost-to-cost, to measure progress towards completion. Additionally, the Company capitalizes certain pre-contract and pre-construction costs, and defers recognition over the life of the contract. The Company’s performance obligations are satisfied over time and revenue is recognized using the cost-to-cost method, described above. Contract modifications are changes in the scope or price (or both) of a contract that are approved by the parties to the contract. The Company recognizes a contract modification when the parties to a contract approve a modification that either creates new, or changes existing, enforceable rights and obligations of the parties to the contract. Contract modifications are routine in the performance of the Company’s contracts. In most instances, contract modifications are for services that are not distinct, and, therefore, are accounted for as part of the existing contract. Contract modifications are included in the transaction price only if it is probable that the modification estimate will not result in a significant reversal of revenue. Revisions in estimated gross profit percentages are recorded in the period during which the change in circumstances is experienced or becomes known. As the duration of most of the Company’s contracts is one year or less, the cumulative net impact of these revisions in estimates, individually and in the aggregate across projects, does not significantly affect results across annual reporting periods. Provisions for estimated losses on contracts in progress are made in the period in which such losses are determined.

The components of costs of contract revenues include labor, equipment (including depreciation, maintenance, insurance and long-term rentals), subcontracts, fuel, supplies, short-term rentals and project overhead. Hourly labor generally is hired on a project-by-project basis. The Company is a party to numerous collective bargaining agreements in the U.S. that govern its relationships with its unionized hourly workforce.

Classification of Current Assets and Liabilities—The Company includes in current assets and liabilities amounts realizable and payable in the normal course of contract completion, unless completion of such contracts extends significantly beyond one year.

Cash Equivalents—The Company considers all highly liquid investments with a maturity at purchase of three months or less to be cash equivalents.

Accounts Receivable—Accounts receivable represent amounts due or billable under the terms of contracts with customers, including amounts related to retainage. The Company anticipates collection of retainage generally within one year, and accordingly presents retainage as a current asset. The Company provides an allowance for estimated uncollectible accounts receivable based on historical and expected losses and when events or conditions indicate that amounts outstanding are not recoverable.

Inventories—Inventories consist of pipe and spare parts used in the Company’s dredging operations. Pipe and spare parts are purchased in large quantities; therefore, a certain amount of pipe and spare part inventories is not anticipated to be used within the

current year and is classified as long-term. Spare part inventories are stated at weighted average historical cost, and are charged to expense when used in operations. Pipe inventory is recorded at cost and amortized to expense over the period of its use.

Property and Equipment—Capital additions, improvements, and major renewals are classified as property and equipment and are carried at depreciated cost. Maintenance and repairs that do not significantly extend the useful lives of the assets or enhance the capabilities of such assets are charged to expenses as incurred. Depreciation is recorded over the estimated useful lives of property and equipment using the straight-line method and the mid-year depreciation convention. The estimated useful lives by class of assets are:

Class	Useful Life (years)
Buildings and improvements	10
Furniture and fixtures	5-10
Vehicles, dozers, and other light operating equipment and systems	3-5
Heavy operating equipment (dredges and barges)	10-30

Leasehold improvements are amortized over the shorter of their remaining useful lives or the remaining terms of the leases.

Goodwill—Goodwill represents the excess of acquisition cost over fair value of the net assets acquired. Goodwill is tested annually for impairment in the third quarter of each year, or more frequently should circumstances dictate. GAAP requires that goodwill of a reporting unit be tested for impairment between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount.

When conducting the annual impairment test for goodwill, the Company can choose to assess qualitative factors to determine whether it is more likely than not the fair value of the reporting unit is below its carrying value. Qualitative factors considered include macroeconomic, industry and market environments, overall financial performance and market indications of value. If a qualitative assessment determines an impairment is more likely than not, the Company is required to perform a quantitative impairment test. Otherwise, no further analysis is required. The Company also may elect to forego this step and just perform the quantitative impairment test.

When performing a quantitative impairment test, the Company assesses the fair values of its reporting unit using both an income-based approach and a market-based approach. Under the income approach, the fair value of the reporting unit is based on the present value of estimated future cash flows. The income approach is dependent on a number of factors, including estimates of expected future revenue, profitability and capital expenditures related to our new build program, future market growth trends, forecasted revenues and expenses, working capital assumptions, appropriate discount rates and other variables. The market approach measures the value of a reporting unit through comparison to comparable companies. Under the market approach, the Company uses the guideline public company method by applying estimated market-based enterprise value multiples to the reporting unit’s estimated trailing and forward Adjusted EBITDA. The Company analyzes companies that performed similar services or are considered peers. Due to the fact that there are no public companies that are direct competitors, the Company weighs the results of this approach less than the income approach.

The Company has one operating segment which is also the Company’s one reportable segment and reporting unit of which the Company tests goodwill for impairment. In the current year, the Company performed a quantitative goodwill impairment test. The Company performed its annual test of impairment as of July 1, 2023 with no indication of impairment as of the test date. When performing the quantitative test, the Company assessed the fair values of its reporting unit using both a market-based approach and an income-based approach. The assessment used estimates based on assumptions that the Company believes to be reasonable, but such assumptions are subject to unpredictability and uncertainty. Likewise, changes in terminal value and discount rate assumptions, unfavorable economic environment or market conditions and other factors in the future may cause a different assessment. Changes in these estimates and assumptions could materially affect the determination of fair value, and may result in the impairment of goodwill in the event that actual results differ from those estimates. As of the test date, the fair value of the reporting unit was in excess of its carrying value by at least 10%. The Company will continue to monitor for changes in facts or circumstances that may impact our estimates. The Company will perform its next scheduled annual test of goodwill in the third quarter of 2024 should no triggering events occur which would require a test prior to the next annual test.

Long-Lived Assets—Long-lived assets are comprised of property and equipment subject to depreciation. Long-lived assets to be held and used are reviewed for possible impairment whenever events indicate that the carrying amount of such assets may not be recoverable. Recoverability of long-lived assets is measured by comparing the projected undiscounted cash flows associated with the assets to their carrying amounts. If an asset is considered impaired, the carrying amount would be reduced to its fair value. No triggering events were identified in 2023 or 2022. If long-lived assets are to be disposed, depreciation is discontinued, if applicable, and the assets are reclassified as held for sale at the lower of their carrying amounts or fair values less estimated costs to sell.

Other Gains and Losses—Other gains and losses include gains and losses on property and equipment that has been retired or otherwise disposed of and the transfer of control is complete. This also includes any impairment expense related to assets that have been designated as held for sale whose carrying amounts exceed their fair values. In 2023, the Company recognized $0.1 million in gains on disposals of assets. Additionally, the Company recognized a $7.4 million gain associated with the early termination of an offshore wind contract. In 2022, the Company recorded an $8.2 million loss related to the retirement of an asset which was classified as held for sale at December 31, 2022. This amount was offset by gains on disposals of assets during 2022 of $0.4 million.

Self-insurance Reserves—The Company self-insures costs associated with its seagoing employees covered by the provisions of Jones Act, workers’ compensation claims, hull and equipment liability, and general business liabilities up to certain limits. Insurance reserves are established for estimates of the loss that the Company may ultimately incur on reported claims, as well as estimates of claims that have been incurred but not yet reported. In determining its estimates, the Company considers historical loss experience and judgments about the present and expected levels of cost per claim. Trends in actual experience are a significant factor in the determination of such reserves.

Income Taxes—The provision for income taxes includes federal, foreign, and state income taxes currently payable and those deferred because of temporary differences between the financial statement and tax basis of assets and liabilities. Recorded deferred income tax assets and liabilities are based on the estimated future tax effects of differences between the financial and tax basis of assets and liabilities, given the effect of currently enacted tax laws. Refer to Note 8, Income Taxes.

Hedging Instruments—At times, the Company designates certain derivative contracts as a cash flow hedge as defined by GAAP. Accordingly, the Company formally documents, at the inception of each hedge, all relationships between hedging instruments and hedged items, as well as its risk-management objective and strategy for undertaking hedge transactions. This process includes linking all derivatives to highly-probable forecasted transactions.

The Company formally assesses, at inception and on an ongoing basis, the effectiveness of hedges in offsetting changes in the cash flows of hedged items. Hedge accounting treatment may be discontinued when (1) it is determined that the derivative is no longer highly effective in offsetting changes in the cash flows of a hedged item (including hedged items for forecasted future transactions), (2) the derivative expires or is sold, terminated or exercised, (3) it is no longer probable that the forecasted transaction will occur or (4) management determines that designating the derivative as a hedging instrument is no longer appropriate. If management elects to stop hedge accounting, it would be on a prospective basis and any hedges in place would be recognized in accumulated other comprehensive income (loss) until all the related forecasted transactions are completed or are probable of not occurring.

Recently Issued Accounting Pronouncements—In December 2023, Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740)” (“ASU 2023-09”). The amendments in ASU 2023-09 address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. One of the amendments in ASU 2023-09 includes disclosure of, on an annual basis, a tabular rate reconciliation of (i) the reported income tax expense (or benefit) from continuing operations, to (ii) the product of the income (or loss) from continuing operations before income taxes and the applicable statutory federal income tax rate of the jurisdiction of domicile using specific categories, including separate disclosure for any reconciling items within certain categories that are equal to or greater than a specified quantitative threshold of 5%. ASU 2023-09 also requires disclosure of, on an annual basis, the year to date amount of income taxes paid (net of refunds received) disaggregated by federal, state, and foreign jurisdictions, including additional disaggregated information on income taxes paid (net of refunds received) to an individual jurisdiction equal to or greater than 5% of total income taxes paid (net of refunds received). The amendments in ASU 2023-09 are effective for annual periods beginning after December 15, 2024, and should be applied prospectively. Management is currently evaluating the impact of this guidance.

In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280)” (“ASU 2023-07”). The amendments in ASU 2023-07 improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. Topic 280 requires a public entity to report a measure of segment profit or loss that the chief operating decision maker (CODM) uses to assess segment performance and make decisions about allocating resources. Topic 280 also requires other specified segment items and amounts, such as depreciation, amortization, and depletion expense, to be disclosed under certain circumstances. The amendments in ASU 2023-07 do not change or

remove those disclosure requirements. The amendments in ASU 2023-07 also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in ASU 2023-07 are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024, adopted retrospectively. Management is currently evaluating the impact of this guidance.

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Earnings (Loss) Per Share

12 Months Ended

Dec. 31, 2023

Earnings (Loss) Per Share [Abstract]

Earnings (Loss) Per Share

2. EARNINGS (LOSS) PER SHARE

Basic earnings (loss) per share is computed by dividing net income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding during the reporting period. Diluted earnings (loss) per share is computed similar to basic earnings (loss) per share except that it reflects the potential dilution that could occur if dilutive securities or other obligations to issue common stock were exercised or converted into common stock.

The computations for basic and diluted earnings (loss) per share for the years ended December 31, 2023, 2022 and 2021 are as follows:

(shares in thousands)
	2023		2022			2021
Net income (loss)	$	13,906	$	(34,055	)	$	49,432
Weighted-average common shares outstanding — basic		66,469		66,051			65,587
Effect of stock options and restricted stock units		488		—			714
Weighted-average common shares outstanding — diluted		66,957		66,051			66,301
Earnings (loss) per share — basic	$	0.21	$	(0.52	)	$	0.75
Earnings (loss) per share — diluted	$	0.21	$	(0.52	)	$	0.75

For the year ended December 31, 2022 the dilutive effect of 462 thousand of non-qualified stock options (“NQSO”) and restricted stock units (“RSU”) were excluded from the diluted weighted-average common shares outstanding as the Company incurred a loss during the period.

For the years ended December 31, 2023, 2022 and 2021, 430 thousand, 351 thousand and 1 thousand, respectively, NQSO and RSUs were excluded from the calculation of diluted earnings per share based on the application of the treasury stock method, as such NQSOs and RSUs were determined to be anti-dilutive.

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Property and Equipment

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Property and Equipment

3. PROPERTY AND EQUIPMENT

Property and equipment at December 31, 2023 and 2022 are as follows:

	2023			2022
Land	$	9,348		$	9,348
Buildings and improvements		1,314			1,314
Furniture and fixtures		20,090			19,986
Operating equipment		1,068,628			991,574
Total property and equipment		1,099,380			1,022,222
Accumulated depreciation		(484,772	)		(478,312	)
Property and equipment — net	$	614,608		$	543,910

Operating equipment of $2,227 and $500 was classified as held for sale, excluded from property and equipment, as of December 31, 2023 and 2022, respectively. Gain or loss on sale of assets, net includes $886 and $8,150 of loss related to the retirement of an asset which is classified as held for sale for the year ended December 31, 2023 and 2022, respectively.

Depreciation expense was $42,525, $46,273 and $43,016, for the years ended December 31, 2023, 2022 and 2021, respectively.

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Leases

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Leases

4. LEASES

The Company leases certain operating equipment and office facilities under long-term operating leases expiring at various dates through 2030. Leases with an initial term greater than twelve months are recorded on the Company’s balance sheet as an operating or finance lease asset and operating or finance lease liability. Operating leases are included in operating lease assets, operating lease liabilities, and operating lease liabilities noncurrent in the Company's consolidated balance sheets. Finance leases are included in other assets, lease liabilities, and other in the Company's consolidated balance sheets. and are measured at the present value of lease payments over the lease term. Substantially all of the Company’s leases are classified as operating leases. Leases with an initial term of twelve months or less with purchase options or extension options that are not reasonably certain to be exercised are not recorded on the balance sheet. The Company recognizes lease expense for these leases on a straight-line basis over the lease term.

The equipment leases contain renewal or purchase options that specify prices at the then fair value upon the expiration of the lease terms. The leases also contain default provisions that are triggered by an acceleration of debt maturity under the terms of the Company’s Amended Credit Agreement, or, in certain instances, cross default to other equipment leases and certain lease arrangements require that the Company maintain certain financial ratios comparable to those required by its Amended Credit Agreement. Additionally, the leases typically contain provisions whereby the Company indemnifies the lessors for the tax treatment attributable to such leases based on the tax rules in place at lease inception. The tax indemnifications do not have a contractual dollar limit. To date, no lessors have asserted any claims against the Company under these tax indemnification provisions.

The exercise of lease renewal options is at the Company’s sole discretion and is considered in the measurement of operating lease assets and operating lease liabilities when it is reasonably certain the Company will exercise the option. Certain leases also include options to purchase the leased property. The depreciable life of assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise.

On November 1, 2023, the Company entered into a purchase agreement to sell certain vessels (the “Property”) for gross cash proceeds of $29.5 million. Concurrent with the sale of these certain vessels, the Company entered into a seven-year lease at an annual rental rate of approximately $4.2 million. The Company determined that the transactions represented a sale and leaseback and, accordingly, established new operating lease right of use assets and operating lease liabilities. The lease did not include an implicit rate of return; therefore, the Company used an incremental borrowing rate. Under the leaseback agreement, the Company has the option to i) purchase the Property after six years with an early buyout option; ii) purchase the Property at the end of the lease at the then fair value; iii) renew the lease at the then fair market value or iv) return the Property to the purchaser.

Lease costs

The Company’s lease costs are recorded in costs of contract revenues and general and administrative expenses. For the years ended December 31, 2023, 2022 and 2021, respectively, lease costs are as follows:

	2023		2022		2021
Operating lease costs	$	29,945	$	24,224	$	24,427
Finance Lease costs
Amortization of finance lease assets		95		—		—
Interest expense on lease liabilities		24		—		—
Short-term lease costs		68,119		94,842		95,957
Total lease cost	$	98,183	$	119,066	$	120,384

Lease terms and commitments

As recorded on the balance sheet, the Company’s maturity analysis of its operating lease liabilities as of December 31, 2023 is as follows:

	Operating			Finance
2024	$	31,465		$	1,291
2025		23,751			1,291
2026		12,843			1,216
2027		10,984			355
2028		9,601			—
Thereafter		12,574			—
Minimum lease payments		101,218			4,153
Imputed interest		(11,087	)		(480	)
Present value of minimum lease liabilities	$	90,131		$	3,673

As most of the Company’s leases do not provide an implicit rate, the Company used its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments.

Additional information related to the Company’s leases as of December 31, 2023, 2022 and 2021 respectively, is as follows:

	2023			2022			2021
Operating
Weighted average remaining lease term (years)		4.5			4.2			4.4
Weighted average discount rate		5.6	%		4.7	%		5.1	%
Finance
Weighted average remaining lease term (years)		3.3			—			—
Weighted average discount rate		7.9	%		—			—

Supplemental balance sheet information related to finance leases as of December 31, 2023 and 2022 respectively, is as follows:

	2023			2022
Finance lease assets:
Other noncurrent assets	$	3,757		$	—
Accumulated depreciation		(95	)		—
Total other noncurrent assets	$	3,662		$	—
Finance lease liabilities:
Accrued expenses		1,047			—
Other noncurrent liabilities		2,626			—
Total finance lease liabilities	$	3,673		$	—

Supplemental cash flow information related to leases during the years ended December 31, 2023, 2022 and 2021 respectively, is as follows:

	2023			2022			2021
Operating cash flows from operating leases	$	(29,016	)	$	(22,775	)	$	(22,591	)
Operating cash flows from finance leases		(24	)		—			—
Financing cash flows from finance leases		(84	)		—			—
Lease liabilities arising from obtaining new operating lease assets		24,808			57,618			24,191
Lease liabilities arising from obtaining new finance lease assets		3,757			—			—

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Accrued Expenses

12 Months Ended

Dec. 31, 2023

Payables and Accruals [Abstract]

Accrued Expenses

5. ACCRUED EXPENSES

Accrued expenses at December 31, 2023 and 2022 were as follows:

	2023		2022
Insurance	$	12,521	$	17,808
Payroll and employee benefits		11,986		2,062
Contract reserves		3,964		966
Fuel hedge contracts		2,918		638
Interest		2,388		1,469
Income and other taxes		1,900		1,419
Finance lease liabilities		1,047		—
Other		637		5,107
Total accrued expenses	$	37,361	$	29,469

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Long-Term Debt

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Long-Term Debt

6. LONG-TERM DEBT

Long-term debt at December 31, 2023 and 2022 were as follows:

	2023		2022
Revolving credit facility	$	90,000	$	—
2029 Notes		322,070		321,521
Total	$	412,070	$	321,521

Credit agreement

On July 29, 2022, the Company, Great Lakes Dredge & Dock Company, LLC, NASDI Holdings, LLC, Great Lakes Environmental & Infrastructure Solutions, LLC, Great Lakes U.S. Fleet Management, LLC, and Drews Services LLC (collectively the “Credit Parties”) entered into a second amended and restated revolving credit and security agreement (as amended, supplemented or otherwise modified from time to time, the “Amended Credit Agreement”) with certain financial institutions from time to time party thereto as lenders, PNC Bank, National Association, as Agent (the “Agent”), PNC Capital Markets, CIBC Bank USA, Bank of America, N.A. and Truist Securities, Inc., as Joint Lead Arrangers and Joint Bookrunners, CIBC Bank USA and Truist Bank as Co-Syndication Agents, Bank of America, N.A., as Documentation Agent and PNC Bank National Association, as Green Loan Coordinator. The Amended Credit Agreement amends and restates the prior Amended Credit Agreement dated as of May 3, 2019 by and among the financial institutions from time to time party thereto as lenders, the Agent and the Credit Parties party thereto such that the terms and conditions of the prior credit agreement have been subsumed and replaced in their entirety by the terms and conditions of the Amended Credit Agreement, including the amount available under the revolving credit facility. The terms of the Amended Credit Agreement are summarized below.

The Amended Credit Agreement provides for a senior secured revolving credit facility in an aggregate principal amount of up to $300,000 of which the full amount is available for the issuance of standby letters of credit. The maximum borrowing capacity under the Amended Credit Agreement is determined by a formula and may fluctuate depending on the value of the collateral included in such formula at the time of determination. The Amended Credit Agreement also includes an increase option that will allow the Company to increase the senior secured revolving credit facility by an aggregate principal amount of up to $100,000. This increase is subject to lenders providing incremental commitments for such increase, the Credit Parties having adequate borrowing capacity and provided that no default or event of default exists both before and after giving effect to such incremental commitment increase.

The Amended Credit Agreement contains a green loan option where the Company can borrow at the lower interest rates described below so long as such funds are used to fund capital investments related to renewable energy and clean transportation projects and are consistent with green loan principles. The green loan option is subject to a $35,000 sublimit.

The Amended Credit Agreement contains customary representations and affirmative and negative covenants, including a springing financial covenant that requires the Credit Parties to maintain a fixed charge coverage ratio (ratio of earnings before income taxes, depreciation and amortization, net interest expenses, non-cash charges and losses and certain other non-recurring charges, minus capital expenditures, income and franchise taxes, to net cash interest expense plus scheduled cash principal payments with respect to debt plus restricted payments paid in cash) of not less than 1.10 to 1.00. The springing financial covenant is triggered when the undrawn availability of the Amended Credit Agreement is less than 12.5% of the maximum loan amount for five consecutive days. The Amended Credit Agreement also contains customary events of default (including non-payment of principal or interest on any material debt and breaches of covenants) as well as events of default relating to certain actions by the Company’s surety bonding providers. The obligations of the Credit Parties under the Amended Credit Agreement will be unconditionally guaranteed, on a joint and several basis, by each existing and subsequently acquired or formed material direct and indirect domestic subsidiary of the Company. Borrowings under the Amended Credit Agreement will be used to pay fees and expenses related to the Amended Credit Agreement, finance acquisitions permitted under the Amended Credit Agreement, finance ongoing working capital, for other general corporate purposes, and with respect to any green loan, fund capital investments related to renewable energy and clean transportation projects. The Amended Credit Agreement matures on the earlier of July 29, 2027 or the date that is ninety-one (91) days prior to the scheduled maturity date of the Company’s unsecured senior notes, which is currently June 1, 2029, if the Company fails to refinance its unsecured senior notes prior to their scheduled maturity date but only if such scheduled maturity date is prior to the maturity date of the Amended Credit Agreement.

The obligations under the Amended Credit Agreement are secured by substantially all of the assets of the Credit Parties. The outstanding obligations thereunder shall be secured by a valid first priority perfected lien on substantially all of the U.S. flagged and located vessels of the Credit Parties and a valid perfected lien on all domestic accounts receivable and substantially all other assets of the Credit Parties, subject to the permitted liens and interests of other parties (including the Company’s surety bonding providers).

Interest on the senior secured revolving credit facility of the Amended Credit Agreement is equal to either a Domestic Rate option or Secured Overnight Financing Rate (“SOFR”) option, at the Company’s election. As of July 29, 2022, (a) the Domestic Rate option is the highest of (1) the base commercial lending rate of PNC Bank, National Association, as publicly announced, (2) the sum of the overnight bank funding rate plus 0.5% and (3) the sum of the daily simple SOFR plus 1.0%, so long as a daily simple SOFR is offered, ascertainable and not unlawful and (b) the SOFR option is the rate that applies for the applicable interest period determined by the Agent and based on the rate published by the CME Group Benchmark Administration Limited (or a successor administrator). After the date on which a borrowing base certificate is required to be delivered under Section 9.2 of the Amended Credit Agreement (commencing with the fiscal quarter ending September 30, 2022), the Domestic Rate option will be the Domestic Rate plus an interest margin ranging between 0.25% and 0.75% and the SOFR option will be the SOFR plus an interest margin ranging between 1.25% and 1.75%, in each case, depending on the quarterly average undrawn availability on the Amended Credit Agreement. Additionally, the Company will have an option to borrow at Green Loan Advance Rates, each of which will be 0.05% lower than the corresponding applicable rate if the Company certifies that it will use such proceeds to invest in renewable energy and clean transportation projects and it complies with green loan principles.

The Company had $90,000 and zero borrowings on the revolver as of December 31, 2023 and 2022, respectively. There were $49,777 and $16,391 of letters of credit outstanding as of December 31, 2023 and 2022, respectively. The Company had $122,320 and $245,713 of net availability under the Amended Credit Agreement as of December 31, 2023 and 2022, respectively. The availability under the Amended Credit Agreement is suppressed by $37,903 and $37,897 as of December 31, 2023 and 2022, respectively, as a result of certain limitations of borrowing related to reserves and compliance with the Company's obligations set forth in the Amended Credit Agreement or the prior credit agreement. Based on the aforementioned variable interest rate components, the weighted average interest rate on the revolver borrowings is 6.71% as of December 31, 2023.

Senior notes and subsidiary guarantors

In May 2021, the Company sold $325,000 of unsecured 5.25% Senior Notes (the “2029 Notes”) pursuant to a private offering. The 2029 Notes were priced to investors at par and will mature on June 1, 2029. The Company used the net proceeds from the offering, together with cash on hand, to redeem all $325,000 aggregate principal amount of its outstanding 8.000% Senior Notes due 2022.

The Company’s obligations under these 2029 Notes are guaranteed by each of the Company’s existing and future 100% owned domestic subsidiaries that are co-borrowers or guarantors under the Amended Credit Agreement. Such guarantees are full, unconditional and joint and several. The parent company issuer has no independent assets or operations and all non-guarantor subsidiaries have been determined to be minor.

Other

The scheduled principal payments through the maturity date of the Company’s long-term debt at December 31, 2023, are as follows:

Years Ending December 31,
2024	$	—
2025		—
2026		—
2027		90,000
2028		—
Thereafter		325,000
Total	$	415,000

The Company incurred amortization of deferred financing fees for its long-term debt of $965, $1,142 and $1,382 for each of the years ended December 31, 2023, 2022 and 2021. Such amortization is recorded as a component of net interest expense.

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Fair Value Measurements

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

7. FAIR VALUE MEASUREMENTS

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. A fair value hierarchy has been established by GAAP that requires an entity to maximize the use of observable

inputs and minimize the use of unobservable inputs when measuring fair value. The accounting guidance describes three levels of inputs that may be used to measure fair value:

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company is exposed to counterparty credit risk associated with non-performance of its various derivative instruments. The Company’s risk would be limited to any unrealized gains on current positions. To help mitigate this risk, the Company transacts only with counterparties that are rated as investment grade or higher. In addition, all counterparties are monitored on a continuous basis.

The Company utilizes the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. At times, the Company holds certain derivative contracts that it uses to manage foreign currency risk or commodity price risk. The Company does not hold or issue derivatives for speculative or trading purposes. The fair values of these financial instruments are summarized as follows:

		Fair Value at
	Fair Value
	Hierarchy	December 31, 2023				December 31, 2022
	Levels	Assets		Liabilities		Assets		Liabilities
Derivatives designated as cash flow hedging instruments:
Fuel hedge contracts	2	$	—	$	2,918	$	—	$	638
Foreign currency exchange hedge contracts	2		358		—		831		6
Total derivatives		$	358	$	2,918	$	831	$	644

Fuel hedge contracts

The Company is exposed to certain market risks, primarily commodity price risk as it relates to the diesel fuel purchase requirements, which occur in the normal course of business. The Company enters into heating oil commodity swap contracts to hedge the risk that fluctuations in diesel fuel prices will have an adverse impact on cash flows associated with its domestic dredging contracts. The Company’s goal is to hedge approximately 80% of the eligible fuel requirements for work in domestic dredging backlog.

As of December 31, 2023, the Company was party to various swap arrangements to hedge the price of a portion of its diesel fuel purchase requirements for work in its backlog to be performed through December 2023. As of December 31, 2023, there were 13.0 million gallons remaining on these contracts representing forecasted domestic fuel purchases through April 2025. Under these swap agreements, the Company will pay fixed prices ranging from $2.35 to $2.90 per gallon.

At December 31, 2023 and 2022, the fair value liability of the fuel hedge contracts were estimated to be $2,918 and $638, respectively, and is recorded in accrued expenses. For fuel hedge contracts considered to be highly effective, the gains reclassified to earnings from changes in fair value of derivatives, net of cash settlements and taxes, for the year ended December 31, 2023 were $861. The remaining gains and losses included in the accumulated other comprehensive income (loss) at December 31, 2023 will be reclassified into earnings over the next twelve months, corresponding to the period during which the hedged fuel is expected to be utilized. Changes in the fair value of fuel hedge contracts not considered highly effective are recorded as costs of contract revenues in the Statement of Operations. The fair value of fuel hedges are corroborated using inputs that are readily observable in public markets; therefore, the Company determines fair values of these fuel hedges using Level 2 inputs.

Foreign currency exchange hedge contracts

The Company is exposed to certain market risks, including foreign currency exchange rate risks related to the purchase of new vessel build materials in Europe. The Company enters into foreign currency exchange forward contracts to hedge the risk that fluctuations in the Euro in relation to the Dollar could have an adverse impact on cash flows associated with its equipment builds.

As of December 31, 2023 and 2022, the Company was party to various foreign exchange forward contract arrangements to hedge the purchase of materials through November 2024. As of December 31, 2023 there were 18.6 million Euro of payments remaining on these hedge contracts. Under these hedge contracts, the Company will pay fixed prices ranging from $1.01 to $1.13 per Euro.

At December 31, 2023 and 2022, the fair value asset of foreign currency exchange hedge contracts were estimated to be $358 and $831, respectively, and is recorded in other current assets. At December 31, 2023 and 2022, the fair value liability of foreign currency exchange hedge contracts were estimated to be zero and $6, respectively, and is recorded in accrued liabilities. For foreign currency exchange hedge contracts considered to be highly effective, the gains reclassified to earnings from changes in fair value, net of cash settlements and taxes, for the year ended December 31, 2023 were $289. For foreign currency exchange hedge contracts considered to be highly effective, the losses reclassified to earnings from changes in fair value of derivatives, net of cash settlements and taxes, for the year ended December 31, 2022 were $155. The remaining gains and losses included in accumulated other comprehensive income (loss) at December 31, 2023 will be reclassified into earnings over the next eleven months, corresponding to the period during which the hedged currency is expected to be utilized. Changes in the fair value of foreign currency exchange hedge contracts not considered highly effective are recorded as other expenses in the Statement of Operations. The fair values of foreign currency exchange hedges are corroborated using inputs that are readily observable in public markets; therefore, the Company determines the fair value of these foreign currency exchange hedges using Level 2 inputs.

Assets and liabilities measured at fair value on a nonrecurring basis

All other nonfinancial assets and liabilities measured at fair value in the financial statements on a nonrecurring basis are subject to fair value measurements and disclosures. Nonfinancial assets and liabilities included in the consolidated balance sheets and measured on a nonrecurring basis consist of goodwill and long-lived assets. Goodwill and long-lived assets are measured at fair value to test for and measure impairment, if any, at least annually for goodwill or when necessary for both goodwill and long-lived assets.

Accumulated other comprehensive income (loss)

Changes in the components of the accumulated balances of other comprehensive income (loss) are as follows:

	2023			2022			2021
Derivatives:
Fuel Hedge Contracts
Reclassification of derivative (gains) losses to earnings—net of tax	$	861		$	(10,629	)	$	(6,481	)
Change in fair value of derivatives—net of tax		(2,565	)		9,681			5,653
Net change in cash flow derivative fuel hedges—net of tax	$	(1,704	)	$	(948	)	$	(828	)
Foreign Currency Exchange Hedge Contracts
Reclassification of derivative (gains) losses to earnings—net of tax	$	(400	)	$	116		$	—
Change in fair value of derivatives—net of tax		280			501			—
Net change in cash flow derivative foreign currency hedges—net of tax		(120	)		617			—
Total net change in cash flow derivative hedges—net of tax	$	(1,824	)	$	(331	)	$	(828	)

Adjustments reclassified from accumulated balances of other comprehensive income (loss) to earnings are as follows:

	Statements of operations location	2023		2022			2021
Derivatives:
	Costs of contract revenues	$	1,152	$	(14,219	)	$	(8,670	)
	Income tax (provision) benefit		291		(3,590	)		(2,189	)
		$	861	$	(10,629	)	$	(6,481	)

Other financial instruments

The carrying value of financial instruments included in current assets and current liabilities approximates fair value due to the short-term maturities of these instruments. Based on timing of the cash flows and comparison to current market interest rates, the carrying value of the senior revolving credit agreement approximates fair value. In May 2021, the Company sold $325,000 of the 2029 Notes pursuant to a private offering, which were outstanding at December 31, 2022 (See Note 6, Long-Term Debt). The 2029 Notes were priced to investors at par and will mature on June 1, 2029. The 2029 Notes are senior unsecured obligations of the Company and its subsidiaries that guarantee the 2029 Notes. The fair value of the 2029 Notes was $276,315 at December 31, 2023, which is a Level 1 fair value measurement as the senior notes value was obtained using quoted prices in active markets. It is impracticable to determine the fair value of outstanding letters of credit or performance, bid and payment bonds due to uncertainties as to the amount and timing of future obligations, if any.

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Income Taxes

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Income Taxes

8. INCOME TAXES

The Company’s income tax provision (benefit) for the years ended December 31, 2023, 2022 and 2021 are as follows:

	2023		2022			2021
Income tax provision (benefit)	$	4,406	$	(9,360	)	$	13,391

The Company’s income (loss) before income tax from domestic and foreign operations for the years ended December 31, 2023, 2022 and 2021 is as follows:

	2023			2022			2021
Domestic operations	$	19,549		$	(43,179	)	$	65,708
Foreign operations		(1,237	)		(236	)		(2,885	)
Total income (loss) before income tax	$	18,312		$	(43,415	)	$	62,823

The provision (benefit) for income taxes as of December 31, 2023, 2022 and 2021 is as follows:

	2023		2022			2021
Federal:
Current	$	—	$	—		$	—
Deferred		3,292		(9,754	)		11,020
State:
Current		422		(90	)		1,080
Deferred		442		484			1,291
Foreign:
Current		250		—			—
Deferred		—		—			—
Total	$	4,406	$	(9,360	)	$	13,391

The Company’s income tax provision (benefit) reconciles to the provision (benefit) at the statutory U.S. federal income tax rate of 21% for the years ended December 31, 2023, 2022 and 2021, as follows:

	2023			2022			2021
Tax provision (benefit) at statutory U.S. federal income tax rate	$	3,846		$	(9,117	)	$	13,193
State income tax — net of federal income tax benefit		774			(3,952	)		2,144
Adjustment to deferred tax depreciation		—			—			(1,414	)
Stock based compensation		315			(414	)		(1,318	)
Nondeductible officer compensation		178			244			1,195
Research and development tax credits		(796	)		(518	)		(642	)
Changes in valuation allowance		—			4,365			—
Other		89			32			233
Income tax provision (benefit)	$	4,406		$	(9,360	)	$	13,391

At December 31, 2023 and 2022, the Company had loss carryforwards for federal income tax purposes of $14,012 and $54,376 respectively. Of the loss carryforwards at December 31, 2023 $996 expires in 2037 and the remaining $13,016 may be carried forward

indefinitely. The Company also has indefinite life carryforwards as a result of interest limitations. Starting in 2022, the Company has research costs attributable to research and development that are currently expensed but are required to be capitalized for U.S. tax purposes and amortized primarily over 5 or 15 years.

At December 31, 2023 and 2022, the Company had gross net operating loss carryforwards for state income tax purposes totaling $182,445 and $188,884, respectively, which expire between 2027 and 2043. The Company has established a valuation allowance that was $6,558 and $5,988 as of December 31, 2023 and 2022, respectively. The Company believes that the remaining net operating losses, net of the valuation allowance, will be fully utilized in future periods.

The Company also has foreign gross net operating loss carryforwards of approximately zero and $69 as of December 31, 2023 and 2022, respectively, which expire between 2023 and 2028. At December 31, 2023 and 2022, a full valuation allowance has been established for the deferred tax asset of zero and $24 related to foreign net operating loss carryforwards, respectively, as the Company believes it is more likely than not that the net operating loss carryforwards will not be realized.

The Company does not expect that total unrecognized tax benefits will significantly increase or decrease within the next 12 months.

The Company’s policy is to recognize interest and penalties related to income tax matters in income tax expense. As of December 31, 2023, 2022 and 2021 the Company had no interest and penalties recorded.

The Organisation for Economic Co-operation and Development has proposed a global minimum tax of 15% of reported profits (“Pillar 2”) that has been agreed upon in principle by over 140 countries. During 2023, many countries took steps to incorporate Pillar 2 model rule concepts into their domestic laws. Although the model rules provide a framework for applying the minimum tax, countries may enact Pillar 2 slightly differently than the model rules and on different timelines and may adjust domestic tax incentives in response to Pillar 2. The Company will continue to analyze the law to determine potential impacts. At this time, the Company does not expect the Pillar 2 legislation to have a material impact on its consolidated financial statements.

The Company files income tax returns at the U.S. federal level and in various state and foreign jurisdictions. U.S. federal income tax years prior to 2020 are closed and no longer subject to examination. With few exceptions, the statute of limitations in state taxing jurisdictions in which the Company operates has expired for all years prior to 2019. In foreign jurisdictions in which the Company operates, years prior to 2017 are closed and are no longer subject to examination.

The Company’s deferred tax assets (liabilities) at December 31, 2023 and 2022 are as follows:

	2023			2022
Deferred tax assets:
Operating lease assets	$	23,685		$	23,200
Accrued liabilities		7,378			5,381
Federal NOLs and interest limitations		4,979			15,042
Foreign NOLs		—			24
State NOLs		9,953			10,291
Research costs		5,193			3,175
Tax credit carryforwards		5,457			4,411
Valuation allowance		(6,558	)		(6,012	)
Total deferred tax assets		50,087			55,512
Deferred tax liabilities:
Depreciation and amortization		(88,906	)		(91,923	)
Operating lease liabilities		(23,245	)		(22,657	)
Other liabilities		(168	)		(47	)
Total deferred tax liabilities		(112,319	)		(114,627	)
Net noncurrent deferred tax liabilities	$	(62,232	)	$	(59,115	)

Deferred tax assets relate primarily to reserves and other liabilities for costs and expenses not currently deductible for tax purposes as well as net operating loss and other carryforwards. Deferred tax liabilities relate primarily to the cumulative difference between book depreciation and amounts deducted for tax purposes. The Company evaluates its ability to realize deferred tax assets by considering all available positive and negative evidence. This evidence includes its cumulative earnings or losses in recent years. The Company further considers the impact on these cumulative earnings or losses of discontinued operations and other divested operations

and joint ventures, restructuring charges and other nonrecurring adjustments that are not indicative of its ability to generate taxable income in future periods. The Company also considers sources of taxable income, such as the amount and timing of realization of its deferred tax liabilities relative to the timing of expiration of loss carryforwards. When it is estimated to be more likely than not that all or some portion of deferred tax assets will not be realized, the Company establishes a valuation allowance for the amount of such deferred tax assets considered to be unrealizable. After evaluating the positive and negative evidence for future realization of deferred tax assets, the Company recorded valuation allowances for foreign net operating loss carryforwards and certain state net operating loss carryforwards to reduce the balance of these deferred tax assets at December 31, 2023 and 2022 as it was more likely than not that the balance of these tax items would not be realized. By contrast, after evaluating the positive and negative evidence, the Company concluded that it was more likely than not that the deferred federal income tax asset and remaining state net operating loss carryforwards recorded at December 31, 2023 and 2022 would ultimately be realized and determined that no valuation allowance was required.

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Share-Based Compensation

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Share-Based Compensation

9. SHARE-BASED COMPENSATION

On May 5, 2021, the Company’s stockholders approved the Great Lakes Dredge & Dock Corporation 2021 Long-Term Incentive Plan (the “Incentive Plan”), which previously had been approved by the Company’s board of directors subject to stockholder approval. The Incentive Plan replaces the 2017 Long-Term Incentive Plan (the “Prior Plan”) and is largely based on the Prior Plan, but with updates to the available shares and other administrative changes. The Incentive Plan permits the granting of stock options, stock appreciation rights, restricted stock and restricted stock units to the Company’s employees and directors for up to 1.5 million shares of common stock, plus the number of shares that remained available for future grant under the Prior Plan as of the effectiveness of the Incentive Plan.

The Prior Plan permitted the granting of stock options, stock appreciation rights, restricted stock and restricted stock units to its employees and directors for up to 3.3 million shares of common stock, plus an additional 1.7 million shares underlying equity awards issued under the 2007 Long-Term Incentive Plan. The Company may also issue share-based compensation as inducement awards to new employees upon approval of the board of directors and/or the applicable committee or committees thereof, as may be required.

Compensation cost charged to expense related to share-based compensation arrangements was $6,316, $4,288 and $5,188, for the years ended December 31, 2023, 2022 and 2021, respectively.

Non-qualified stock options

The NQSO awards were granted with an exercise price equal to the market price of the Company’s common stock at the date of grant. The option awards generally vest in three equal annual installments commencing on the first anniversary of the grant date, and have ten year exercise periods.

The fair value of the NQSOs was determined at the grant date using a Black-Scholes option pricing model, which requires the Company to make several assumptions. The risk-free interest rate is based on the U.S. Treasury yield curve in effect for the expected term of the option at the time of grant. The annual dividend yield on the Company’s common stock is based on estimates of future dividends during the expected term of the NQSOs. The expected life of the NQSOs was determined from historical exercise data providing a reasonable basis upon which to estimate the expected life. The volatility assumptions were based on historical volatility of Great Lakes. There is not an active market for options on the Company’s common stock and, as such, implied volatility for the Company’s stock was not considered. Additionally, the Company’s general policy is to issue new shares of registered common stock to satisfy stock option exercises or grants of restricted stock. No NQSO awards were granted in 2023, 2022 and 2021. The aggregate intrinsic value of stock options represents the difference between market value on the date of exercise and the option price. No stock options were exercised during 2023. The aggregate intrinsic value of stock options exercised during 2022 and 2021 was $212 and $1,351, respectively.

A summary of stock option activity under the Incentive Plan as of December 31, 2023, and changes during the year ended December 31, 2023, is presented below:

Options	Shares			Weighted Average Exercise Price		Weighted-Average Remaining Contract Term (yrs)		Aggregate Intrinsic Value ($000's)
Outstanding as of January 1, 2023		76		$	7.61
Granted		—			—
Exercised		—			—
Forfeited or Expired		(11	)		7.56
Outstanding as of December 31, 2023		65		$	7.62		0.4	$	4
Vested at December 31, 2023		65		$	7.62		0.4	$	4

Restricted stock units

RSUs primarily vest in equal portions over the three year vesting period. The fair value of RSUs was based upon the Company’s stock price on the date of grant. A summary of the status of the Company’s non-vested RSUs as of December 31, 2023, and changes during the year ended December 31, 2023, is presented below:

Non-vested Restricted Stock Units	Shares			Weighted-Average Grant-Date Fair Value
Outstanding as of January 1, 2023		1,107		$	12.62
Granted		825			5.87
Vested		(253	)		11.35
Forfeited		(69	)		7.90
Outstanding as of December 31, 2023		1,610		$	8.68
Expected to vest at December 31, 2023		1,541		$	8.72

As of December 31, 2023, there was $6,661 of total unrecognized compensation cost related to non-vested RSUs granted under the Incentive Plan. That cost for non-vested RSUs is expected to be recognized over a weighted-average period of 1.9 years.

The Incentive Plan permits the employee to use vested shares from RSUs to satisfy the grantee’s U.S. federal income tax liability resulting from the issuance of the shares through the Company’s retention of that number of common shares having a market value as of the vesting date equal to such tax obligation up to the minimum statutory withholding requirements. The amount related to shares used for such tax withholding obligations was approximately $560 and $2,185 for the years ended December 31, 2023 and 2022, respectively.

Director compensation

The Company uses a combination of cash and share-based compensation to attract and retain qualified candidates to serve on its board of directors. Compensation is paid to non-employee directors. Directors who are employees receive no additional compensation for services as members of the board of directors or any of its committees. Share-based compensation is paid pursuant to the Incentive Plan. Each non-employee director of the Company receives an annual retainer of $160, payable quarterly in arrears, and is generally paid 50% in cash and 50% in common stock or deferred restricted stock units of the Company. Directors may elect to receive some or all of the cash retainer in common stock or deferred restricted stock units. In 2023, the Chairman of the Board received an additional $100 of annual compensation, paid 100% in common stock.

In the years ended December 31, 2023, 2022 and 2021, 56 thousand, 106 thousand and 50 thousand shares, respectively, of the Company’s common stock or restricted stock units were issued to non-employee directors under the Incentive Plan.

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Revenue

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Revenue

10. REVENUE

The Company’s revenue is derived from contracts for services with federal, state, local and foreign governmental entities and private customers. Revenues are generally derived from the enhancement or preservation of navigability of waterways or the protection of shorelines through the removal or replenishment of soil, sand or rock.

Performance obligations

A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account upon which the Company’s revenue is calculated. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue as the performance obligation is satisfied. Fixed-price contracts, which comprise substantially all of the Company’s revenue, will most often represent a single performance obligation as the promise to transfer the individual services is not separately identifiable from other promises in the contracts and, therefore, not distinct.

The Company’s performance obligations are satisfied over time and revenue is recognized using contract fulfillment costs incurred to date compared to total estimated costs at completion, also known as cost-to-cost, to measure progress towards completion. As the Company’s performance creates an asset that the customer controls, this method provides a faithful depiction of the transfer of an asset to the customer. Generally, the Company has an enforceable right to payment for performance completed to date.

The majority of the Company’s contracts are completed in a year or less. At December 31, 2023, the Company had $1.04 billion of remaining performance obligations, which the Company refers to as total dredging backlog. Total dredging backlog does not include $44.6 million of performance obligations related to offshore wind contracts. The Company expects to perform on its offshore wind contracts using the inclined fall-pipe vessel for subsea rock installation which is expected to be delivered and operational in the 2025. Approximately 60% of the Company’s dredging backlog will be completed in 2024.

Transaction price

The transaction price is calculated using the Company’s estimated costs to complete a project. These costs are based on the types of equipment required to perform the specified service, project site conditions, the estimated project duration, seasonality, location and complexity of a project.

The nature of the Company’s contracts gives rise to several types of variable consideration, including pay on quantity dredged for dredging projects and dredging project contract modifications. Estimated pay quantity is the amount of material the Company expects to dredge for which it will receive payment. Estimated quantity to be dredged is calculated using engineering estimates based on current survey data and the Company’s knowledge based on historical project experience.

Revenue by category

Domestically, the Company’s work generally is performed in coastal waterways and deep-water ports. The U.S. dredging market consists of four primary types of work: capital, coastal protection, maintenance and rivers & lakes. Foreign projects typically involve capital work.

The following table sets forth, by type of work, the Company’s contract revenues for the years ended December 31, 2023, 2022 and 2021:

Revenues	2023		2022		2021
Dredging:
Capital—U.S.	$	186,715	$	342,461	$	397,034
Capital—foreign		—		149		6,596
Coastal protection		196,343		192,567		169,678
Maintenance		187,586		98,077		132,551
Rivers & lakes		16,318		15,527		20,290
Total dredging revenues	$	586,962	$	648,781	$	726,149
Offshore Wind:
Offshore Wind		2,663		—		—
Total revenues	$	589,625	$	648,781	$	726,149

The following table sets forth, by type of customer, the Company’s contract revenues for the years ended December 31, 2023, 2022 and 2021:

Revenues	2023		2022		2021
Dredging:
Federal government	$	438,790	$	431,705	$	568,980
State and local government		129,583		207,033		118,712
Private		18,589		9,894		31,861
Foreign		—		149		6,596
Total dredging revenues	$	586,962	$	648,781	$	726,149
Offshore wind:
Offshore wind		2,663		—		—
Total revenues	$	589,625	$	648,781	$	726,149

Contract balances

Billings on contracts are generally submitted after verification with the customers of physical progress and are recognized as accounts receivable in the balance sheet. For billings that do not match the timing of revenue recognition, the difference between amounts billed and recognized as revenue is reflected in the balance sheet as either contract revenues in excess of billings or billings in

excess of contract revenues. Certain pre-contract and pre-construction costs are capitalized and reflected as contract assets in the balance sheet. Customer advances, deposits and commissions are reflected in the balance sheet as contract liabilities.

Accounts receivable at December 31, 2023 and December 31, 2022 are as follows:

	2023			2022
Completed contracts	$	2,920		$	4,682
Contracts in progress		40,743			32,546
Retainage		11,511			8,226
		55,174			45,454
Allowance for doubtful accounts		(364	)		(564	)
Total accounts receivable—net	$	54,810		$	44,890

The components of contracts in progress at December 31, 2023 and December 31, 2022 are as follows:

	2023			2022
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	206,330		$	262,125
Amounts billed		(196,520	)		(210,068	)
Costs and earnings in excess of billings for contracts in progress		9,810			52,057
Costs and earnings in excess of billings for completed contracts		58,925			14,972
Total contract revenues in excess of billings	$	68,735		$	67,029
Current portion of contract revenues in excess of billings	$	68,735		$	65,922
Long-term contract revenues in excess of billings		—			1,107
Total contract revenues in excess of billings	$	68,735		$	67,029
Billings in excess of costs and earnings:
Amounts billed	$	(258,948	)	$	(95,013	)
Costs and earnings for contracts in progress		229,388			85,099
Total billings in excess of contract revenues	$	(29,560	)	$	(9,914	)

In the year ending December 31, 2022, a revision to the estimated gross profit percentage of a project was recognized due to a positive settlement of a claim from the recently completed project resulting in a cumulative net impact on the project margin, which increased gross profit by $22,276.

At December 31, 2023 and 2022, costs to fulfill contracts with customers recognized as other current assets were $18,138 and $4,472, respectively. At December 31, 2023, costs to fulfill contracts with customers recognized as other noncurrent assets were $4,028. At December 31, 2022, there were no costs to fulfill contracts with customers recognized as other noncurrent assets. These costs relate to pre-contract and pre-construction activities. During the years ended December 31, 2023 and 2022 the company amortized pre-contract and pre-construction costs of $11,474 and $11,148, respectively.

The Company’s largest domestic customer is the U.S. Army Corps of Engineers (the “Corps”), which has responsibility for federally funded projects related to navigation and flood control of U.S. waterways. In 2023, 2022 and 2021, 75%, 67% and 78%, respectively, of contract revenues were earned from contracts with federal government agencies, including the Corps, as well as other federal entities such as the U.S. Coast Guard and U.S. Navy. During the year ended December 31, 2021 the Company recognized $716 of revenue related to the use of equipment by a customer working on a federal government contract. At December 31, 2023 and 2022, approximately 36% and 46% respectively, of accounts receivable, including contract revenues in excess of billings and retainage, were due on contracts with federal government agencies. The Company depends on its ability to continue to obtain federal government contracts, and indirectly, on the amount of federal funding for new and current government dredging projects. Therefore, the Company’s operations can be influenced by the level and timing of federal funding.

The Company derived revenues and gross loss from foreign project operations for the years ended December 31, 2023, 2022, and 2021, as follows:

	2023			2022			2021
Contract revenues	$	—		$	149		$	6,596
Costs of contract revenues		(1,142	)		(341	)		(9,281	)
Gross loss	$	(1,142	)	$	(192	)	$	(2,685	)

In 2022 and 2021, foreign revenues were primarily from work done in the Middle East. The majority of the Company’s long-lived assets are marine vessels and related equipment. At any point in time, the Company may employ certain assets outside of the U.S., as needed, to perform work on the Company’s foreign projects. As of December 31, 2023 and 2022, long-lived assets located outside of the U.S had no net book value. Currently our assets outside of the U.S. do not include dredges. Revenue from foreign projects has been concentrated in the Middle East which comprised less than 1% in 2023, 2022 and 2021. At December 31, 2023, there were no accounts receivable due on contracts in the Middle East. At December 31, 2022, approximately 9%, of total accounts receivable, including retainage and contract revenues in excess of billings, were due on contracts in the Middle East.

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Retirement Plans

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Retirement Plans

11. RETIREMENT PLANS

The Company sponsors two 401(k) savings plans, one covering substantially all non-union salaried employees (“Salaried Plan”), a second covering its hourly employees (“Hourly Plan”). Under the Salaried Plan and the Hourly Plan, individual employees may contribute a percentage of compensation and the Company will match a portion of the employees’ contributions. The Salaried Plan also includes a discretionary profit-sharing component, permitting the Company to make discretionary employer contributions to all eligible employees of these plans. Additionally, the Company sponsors a Supplemental Savings Plan in which the Company makes contributions for certain key executives. The Company’s expense for matching, discretionary and Supplemental Savings Plan contributions for 2023, 2022 and 2021, was $4,757, $2,996 and $4,659, respectively.

The Company also contributes to various multiemployer pension plans pursuant to collective bargaining agreements. In 2023, 2022 and 2021, the Company contributed $5,153, $4,915 and $4,632 respectively to all of the multiemployer plans that provide pension benefits. The information available to the Company about the multiemployer plans in which it participates, whether via request to the plan or publicly available, is generally dated due to the nature of the reporting cycle of multiemployer plans and legal requirements under the Employee Retirement Income Security Act (“ERISA”) as amended by the Multiemployer Pension Plan Amendments Act (“MPPAA”). Based upon these plans’ most recently available annual reports, the Company’s contributions to these plans were less than 5% of each plan’s total contributions.

The Company does not expect any future increased contributions to have a material negative impact on its financial position, results of operations or cash flows for future years. The risks of participating in multiemployer plans are different from single employer plans as assets contributed are available to provide benefits to employees of other employers and unfunded obligations from an employer that discontinues contributions are the responsibility of all remaining employers. In addition, in the event of a plan’s termination or the Company’s withdrawal from a plan, the Company may be liable for a portion of the plan’s unfunded vested benefits. However, information from the plans’ administrators is not available to permit the Company to determine its share, if any, of unfunded vested benefits.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

12. COMMITMENTS AND CONTINGENCIES

Commercial commitments

Performance and bid bonds are customarily required for dredging and marine construction projects. The Company has bonding agreements with Argonaut Insurance Company, ACE Holdings, Liberty Mutual Insurance Company and Philadelphia Indemnity Insurance Company, (collectively, the “Sureties”) under which the Company can obtain performance, bid and payment bonds. The Company also currently has outstanding bonds with Travelers Casualty and Surety Company of America, Berkley Insurance Company and Zurich American Insurance Company. Bid bonds are generally obtained for a percentage of bid value and amounts outstanding typically range from $1,000 to $10,000. At December 31, 2023, the Company had outstanding performance bonds with a notional amount of approximately $960,906. The revenue value remaining in backlog related to the projects totaled approximately $546,759.

Certain foreign projects performed by the Company have warranty periods, typically spanning no more than one to three years beyond project completion, whereby the Company retains responsibility to maintain the project site to certain specifications during the warranty period. Generally, any potential liability of the Company is mitigated by insurance, shared responsibilities with consortium partners, and/or recourse to owner-provided specifications.

Legal proceedings and other contingencies

As is customary with negotiated contracts and modifications or claims to competitively bid contracts with the federal government, the government has the right to audit the books and records of the Company to ensure compliance with such contracts, modifications, or claims, and the applicable federal laws. The government has the ability to seek a price adjustment based on the results of such audit. Any such audits have not had, and are not expected to have, a material impact on the financial position, operations, or cash flows of the Company.

Various legal actions, claims, assessments and other contingencies arising in the ordinary course of business are pending against the Company and certain of its subsidiaries. The Company will defend itself vigorously on all matters. These matters are subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved, or settled adversely to the Company. Although the Company is subject to various claims and legal actions that arise in the ordinary course of business, except as described below, the Company is not currently a party to any material legal proceedings or environmental claims. The Company records an accrual when it is probable a liability has been incurred and the amount of loss can be reasonably estimated. The Company does not believe any of these proceedings, individually or in the aggregate, would be expected to have a material effect on results of operations, cash flows or financial condition.

On April 23, 2014, the Company completed the sale of NASDI, LLC (“NASDI”) and Yankee Environmental Services, LLC (“Yankee”), which together comprised the Company’s historical demolition business, to a privately-owned demolition company. The Company has been involved in litigation relating to this sale, and on April 11, 2022 the Supreme Court of Delaware affirmed an earlier decision by Delaware Court of Chancery granting the Company a $21,934 judgment relating to the buyer's default of its obligations to indemnify the Company for losses resulting from failure to perform in accordance with terms of a surety performance bond. Following this judgment, the Company continued to aggressively pursue collection from the buyer on outstanding amounts owed under the sale and the indemnification. On April 24, 2023, the Company settled the remaining litigation related to the sale and subsequent buyer's default of its obligations to indemnify the Company. The settlement called for a one-time payment to the Company from entities affiliated with the buyer in the amount of $1,250, a disbursement to the Company from a litigation escrow account in the amount of $680 and a release of funds retained by New York City to the Company in connection with a pre-purchase construction project, which is expected to be approximately $800 after the payment of related expenses. For the year ended December 31, 2023, the Company recorded a $2,410 benefit in cost of contract revenues and $784 in other income related to the settlement and the release of certain liabilities related to the original sale. As of December 31, 2023, the Company has received $1,930 of the settlement, with the remaining $800 yet to be released by New York City. This amount is recorded in prepaid expenses and other current assets in the consolidated balance sheets.

Lease obligations

The Company leases certain operating equipment and office facilities under long-term operating leases expiring at various dates through 2030. The equipment leases contain renewal or purchase options that specify prices at the then fair value upon the expiration of the lease terms. The leases also contain default provisions that are triggered by an acceleration of debt maturity under the terms of the Company’s Amended Credit Agreement, or, in certain instances, cross default to other equipment leases and certain lease arrangements require that the Company maintain certain financial ratios comparable to those required by its Amended Credit Agreement. Additionally, the leases typically contain provisions whereby the Company indemnifies the lessors for the tax treatment attributable to such leases based on the tax rules in place at lease inception. The tax indemnifications do not have a contractual dollar limit. To date, no lessors have asserted any claims against the Company under these tax indemnification provisions.

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Schedule II-Valuation and Qualify Accounts

12 Months Ended

Dec. 31, 2023

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II-Valuation and Qualifying Accounts

Great Lakes Dredge & Dock Corporation
Schedule II—Valuation and Qualifying Accounts
For the Years Ended December 31, 2023, 2022 and 2021
(In thousands)
	Beginning Balance		Additions		Deductions		Ending balance
Description
Year ended December 31, 2021
Allowances deducted from assets to which they apply:
Allowances for doubtful accounts	$	564	$	—	$	—	$	564
Valuation allowance for deferred tax assets		2,473		14		—		2,487
Total	$	3,037	$	14	$	—	$	3,051
Year ended December 31, 2022
Allowances deducted from assets to which they apply:
Allowances for doubtful accounts	$	564	$	—	$	—	$	564
Valuation allowance for deferred tax assets		2,487		3,525		—		6,012
Total	$	3,051	$	3,525	$	—	$	6,576
Year ended December 31, 2023
Allowances deducted from assets to which they apply:
Allowances for doubtful accounts	$	564	$	—	$	200	$	364
Valuation allowance for deferred tax assets		6,012		546		—		6,558
Total	$	6,576	$	546	$	200	$	6,922

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Nature of Business and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Principles of Consolidation and Basis of Presentation

Principles of Consolidation and Basis of Presentation—The consolidated financial statements include the accounts of Great Lakes Dredge & Dock Corporation and its majority-owned subsidiaries. All intercompany accounts and transactions are eliminated in consolidation. The equity method of accounting is used for investments in unconsolidated investees in which the Company has significant influence, but not control. Other investments, if any, are carried at cost.

Use of Estimates

Use of Estimates—The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect certain reported amounts and disclosures. Accordingly, actual results could differ from those estimates.

Revenue and Cost Recognition on Contracts

Revenue and Cost Recognition on Contracts—Revenue is recognized using contract fulfillment costs incurred to date compared to total estimated costs at completion, also known as cost-to-cost, to measure progress towards completion. Additionally, the Company capitalizes certain pre-contract and pre-construction costs, and defers recognition over the life of the contract. The Company’s performance obligations are satisfied over time and revenue is recognized using the cost-to-cost method, described above. Contract modifications are changes in the scope or price (or both) of a contract that are approved by the parties to the contract. The Company recognizes a contract modification when the parties to a contract approve a modification that either creates new, or changes existing, enforceable rights and obligations of the parties to the contract. Contract modifications are routine in the performance of the Company’s contracts. In most instances, contract modifications are for services that are not distinct, and, therefore, are accounted for as part of the existing contract. Contract modifications are included in the transaction price only if it is probable that the modification estimate will not result in a significant reversal of revenue. Revisions in estimated gross profit percentages are recorded in the period during which the change in circumstances is experienced or becomes known. As the duration of most of the Company’s contracts is one year or less, the cumulative net impact of these revisions in estimates, individually and in the aggregate across projects, does not significantly affect results across annual reporting periods. Provisions for estimated losses on contracts in progress are made in the period in which such losses are determined.

The components of costs of contract revenues include labor, equipment (including depreciation, maintenance, insurance and long-term rentals), subcontracts, fuel, supplies, short-term rentals and project overhead. Hourly labor generally is hired on a project-by-project basis. The Company is a party to numerous collective bargaining agreements in the U.S. that govern its relationships with its unionized hourly workforce.

Classification of Current Assets and Liabilities

Classification of Current Assets and Liabilities—The Company includes in current assets and liabilities amounts realizable and payable in the normal course of contract completion, unless completion of such contracts extends significantly beyond one year.

Cash Equivalents

Cash Equivalents—The Company considers all highly liquid investments with a maturity at purchase of three months or less to be cash equivalents.

Accounts Receivable

Accounts Receivable—Accounts receivable represent amounts due or billable under the terms of contracts with customers, including amounts related to retainage. The Company anticipates collection of retainage generally within one year, and accordingly presents retainage as a current asset. The Company provides an allowance for estimated uncollectible accounts receivable based on historical and expected losses and when events or conditions indicate that amounts outstanding are not recoverable.

Inventories

Inventories—Inventories consist of pipe and spare parts used in the Company’s dredging operations. Pipe and spare parts are purchased in large quantities; therefore, a certain amount of pipe and spare part inventories is not anticipated to be used within the

current year and is classified as long-term. Spare part inventories are stated at weighted average historical cost, and are charged to expense when used in operations. Pipe inventory is recorded at cost and amortized to expense over the period of its use.

Property, Plant and Equipment

Property and Equipment—Capital additions, improvements, and major renewals are classified as property and equipment and are carried at depreciated cost. Maintenance and repairs that do not significantly extend the useful lives of the assets or enhance the capabilities of such assets are charged to expenses as incurred. Depreciation is recorded over the estimated useful lives of property and equipment using the straight-line method and the mid-year depreciation convention. The estimated useful lives by class of assets are:

Class	Useful Life (years)
Buildings and improvements	10
Furniture and fixtures	5-10
Vehicles, dozers, and other light operating equipment and systems	3-5
Heavy operating equipment (dredges and barges)	10-30

Leasehold improvements are amortized over the shorter of their remaining useful lives or the remaining terms of the leases.

Goodwill

Goodwill—Goodwill represents the excess of acquisition cost over fair value of the net assets acquired. Goodwill is tested annually for impairment in the third quarter of each year, or more frequently should circumstances dictate. GAAP requires that goodwill of a reporting unit be tested for impairment between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount.

When conducting the annual impairment test for goodwill, the Company can choose to assess qualitative factors to determine whether it is more likely than not the fair value of the reporting unit is below its carrying value. Qualitative factors considered include macroeconomic, industry and market environments, overall financial performance and market indications of value. If a qualitative assessment determines an impairment is more likely than not, the Company is required to perform a quantitative impairment test. Otherwise, no further analysis is required. The Company also may elect to forego this step and just perform the quantitative impairment test.

When performing a quantitative impairment test, the Company assesses the fair values of its reporting unit using both an income-based approach and a market-based approach. Under the income approach, the fair value of the reporting unit is based on the present value of estimated future cash flows. The income approach is dependent on a number of factors, including estimates of expected future revenue, profitability and capital expenditures related to our new build program, future market growth trends, forecasted revenues and expenses, working capital assumptions, appropriate discount rates and other variables. The market approach measures the value of a reporting unit through comparison to comparable companies. Under the market approach, the Company uses the guideline public company method by applying estimated market-based enterprise value multiples to the reporting unit’s estimated trailing and forward Adjusted EBITDA. The Company analyzes companies that performed similar services or are considered peers. Due to the fact that there are no public companies that are direct competitors, the Company weighs the results of this approach less than the income approach.

The Company has one operating segment which is also the Company’s one reportable segment and reporting unit of which the Company tests goodwill for impairment. In the current year, the Company performed a quantitative goodwill impairment test. The Company performed its annual test of impairment as of July 1, 2023 with no indication of impairment as of the test date. When performing the quantitative test, the Company assessed the fair values of its reporting unit using both a market-based approach and an income-based approach. The assessment used estimates based on assumptions that the Company believes to be reasonable, but such assumptions are subject to unpredictability and uncertainty. Likewise, changes in terminal value and discount rate assumptions, unfavorable economic environment or market conditions and other factors in the future may cause a different assessment. Changes in these estimates and assumptions could materially affect the determination of fair value, and may result in the impairment of goodwill in the event that actual results differ from those estimates. As of the test date, the fair value of the reporting unit was in excess of its carrying value by at least 10%. The Company will continue to monitor for changes in facts or circumstances that may impact our estimates. The Company will perform its next scheduled annual test of goodwill in the third quarter of 2024 should no triggering events occur which would require a test prior to the next annual test.

Long-Lived Assets

Long-Lived Assets—Long-lived assets are comprised of property and equipment subject to depreciation. Long-lived assets to be held and used are reviewed for possible impairment whenever events indicate that the carrying amount of such assets may not be recoverable. Recoverability of long-lived assets is measured by comparing the projected undiscounted cash flows associated with the assets to their carrying amounts. If an asset is considered impaired, the carrying amount would be reduced to its fair value. No triggering events were identified in 2023 or 2022. If long-lived assets are to be disposed, depreciation is discontinued, if applicable, and the assets are reclassified as held for sale at the lower of their carrying amounts or fair values less estimated costs to sell.

Other Gains and Losses

Other Gains and Losses—Other gains and losses include gains and losses on property and equipment that has been retired or otherwise disposed of and the transfer of control is complete. This also includes any impairment expense related to assets that have been designated as held for sale whose carrying amounts exceed their fair values. In 2023, the Company recognized $0.1 million in gains on disposals of assets. Additionally, the Company recognized a $7.4 million gain associated with the early termination of an offshore wind contract. In 2022, the Company recorded an $8.2 million loss related to the retirement of an asset which was classified as held for sale at December 31, 2022. This amount was offset by gains on disposals of assets during 2022 of $0.4 million.

Self-insurance Reserves

Self-insurance Reserves—The Company self-insures costs associated with its seagoing employees covered by the provisions of Jones Act, workers’ compensation claims, hull and equipment liability, and general business liabilities up to certain limits. Insurance reserves are established for estimates of the loss that the Company may ultimately incur on reported claims, as well as estimates of claims that have been incurred but not yet reported. In determining its estimates, the Company considers historical loss experience and judgments about the present and expected levels of cost per claim. Trends in actual experience are a significant factor in the determination of such reserves.

Income Taxes

Income Taxes—The provision for income taxes includes federal, foreign, and state income taxes currently payable and those deferred because of temporary differences between the financial statement and tax basis of assets and liabilities. Recorded deferred income tax assets and liabilities are based on the estimated future tax effects of differences between the financial and tax basis of assets and liabilities, given the effect of currently enacted tax laws. Refer to Note 8, Income Taxes.

Hedging Instruments

Hedging Instruments—At times, the Company designates certain derivative contracts as a cash flow hedge as defined by GAAP. Accordingly, the Company formally documents, at the inception of each hedge, all relationships between hedging instruments and hedged items, as well as its risk-management objective and strategy for undertaking hedge transactions. This process includes linking all derivatives to highly-probable forecasted transactions.

The Company formally assesses, at inception and on an ongoing basis, the effectiveness of hedges in offsetting changes in the cash flows of hedged items. Hedge accounting treatment may be discontinued when (1) it is determined that the derivative is no longer highly effective in offsetting changes in the cash flows of a hedged item (including hedged items for forecasted future transactions), (2) the derivative expires or is sold, terminated or exercised, (3) it is no longer probable that the forecasted transaction will occur or (4) management determines that designating the derivative as a hedging instrument is no longer appropriate. If management elects to stop hedge accounting, it would be on a prospective basis and any hedges in place would be recognized in accumulated other comprehensive income (loss) until all the related forecasted transactions are completed or are probable of not occurring.

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements—In December 2023, Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740)” (“ASU 2023-09”). The amendments in ASU 2023-09 address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. One of the amendments in ASU 2023-09 includes disclosure of, on an annual basis, a tabular rate reconciliation of (i) the reported income tax expense (or benefit) from continuing operations, to (ii) the product of the income (or loss) from continuing operations before income taxes and the applicable statutory federal income tax rate of the jurisdiction of domicile using specific categories, including separate disclosure for any reconciling items within certain categories that are equal to or greater than a specified quantitative threshold of 5%. ASU 2023-09 also requires disclosure of, on an annual basis, the year to date amount of income taxes paid (net of refunds received) disaggregated by federal, state, and foreign jurisdictions, including additional disaggregated information on income taxes paid (net of refunds received) to an individual jurisdiction equal to or greater than 5% of total income taxes paid (net of refunds received). The amendments in ASU 2023-09 are effective for annual periods beginning after December 15, 2024, and should be applied prospectively. Management is currently evaluating the impact of this guidance.

In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280)” (“ASU 2023-07”). The amendments in ASU 2023-07 improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. Topic 280 requires a public entity to report a measure of segment profit or loss that the chief operating decision maker (CODM) uses to assess segment performance and make decisions about allocating resources. Topic 280 also requires other specified segment items and amounts, such as depreciation, amortization, and depletion expense, to be disclosed under certain circumstances. The amendments in ASU 2023-07 do not change or

remove those disclosure requirements. The amendments in ASU 2023-07 also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in ASU 2023-07 are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024, adopted retrospectively. Management is currently evaluating the impact of this guidance.

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Nature of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Estimated Useful Lives By Class Of Assets

The estimated useful lives by class of assets are:

Class	Useful Life (years)
Buildings and improvements	10
Furniture and fixtures	5-10
Vehicles, dozers, and other light operating equipment and systems	3-5
Heavy operating equipment (dredges and barges)	10-30

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Earnings (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2023

Earnings (Loss) Per Share [Abstract]

Computations for Basic and Diluted Earnings (Loss) Per Share

The computations for basic and diluted earnings (loss) per share for the years ended December 31, 2023, 2022 and 2021 are as follows:

(shares in thousands)
	2023		2022			2021
Net income (loss)	$	13,906	$	(34,055	)	$	49,432
Weighted-average common shares outstanding — basic		66,469		66,051			65,587
Effect of stock options and restricted stock units		488		—			714
Weighted-average common shares outstanding — diluted		66,957		66,051			66,301
Earnings (loss) per share — basic	$	0.21	$	(0.52	)	$	0.75
Earnings (loss) per share — diluted	$	0.21	$	(0.52	)	$	0.75

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Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Schedule of Property Plant and Equipment

Property and equipment at December 31, 2023 and 2022 are as follows:

	2023			2022
Land	$	9,348		$	9,348
Buildings and improvements		1,314			1,314
Furniture and fixtures		20,090			19,986
Operating equipment		1,068,628			991,574
Total property and equipment		1,099,380			1,022,222
Accumulated depreciation		(484,772	)		(478,312	)
Property and equipment — net	$	614,608		$	543,910

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Leases (Tables)

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Schedule of Lease Costs

The Company’s lease costs are recorded in costs of contract revenues and general and administrative expenses. For the years ended December 31, 2023, 2022 and 2021, respectively, lease costs are as follows:

	2023		2022		2021
Operating lease costs	$	29,945	$	24,224	$	24,427
Finance Lease costs
Amortization of finance lease assets		95		—		—
Interest expense on lease liabilities		24		—		—
Short-term lease costs		68,119		94,842		95,957
Total lease cost	$	98,183	$	119,066	$	120,384

Schedule of Maturity Analysis of Operating Lease Liabilities

As recorded on the balance sheet, the Company’s maturity analysis of its operating lease liabilities as of December 31, 2023 is as follows:

	Operating			Finance
2024	$	31,465		$	1,291
2025		23,751			1,291
2026		12,843			1,216
2027		10,984			355
2028		9,601			—
Thereafter		12,574			—
Minimum lease payments		101,218			4,153
Imputed interest		(11,087	)		(480	)
Present value of minimum lease liabilities	$	90,131		$	3,673

Schedule of Additional Information Related to Leases

Additional information related to the Company’s leases as of December 31, 2023, 2022 and 2021 respectively, is as follows:

	2023			2022			2021
Operating
Weighted average remaining lease term (years)		4.5			4.2			4.4
Weighted average discount rate		5.6	%		4.7	%		5.1	%
Finance
Weighted average remaining lease term (years)		3.3			—			—
Weighted average discount rate		7.9	%		—			—

Supplemental Balance Sheet Information Related to Finance Leases

Supplemental balance sheet information related to finance leases as of December 31, 2023 and 2022 respectively, is as follows:

	2023			2022
Finance lease assets:
Other noncurrent assets	$	3,757		$	—
Accumulated depreciation		(95	)		—
Total other noncurrent assets	$	3,662		$	—
Finance lease liabilities:
Accrued expenses		1,047			—
Other noncurrent liabilities		2,626			—
Total finance lease liabilities	$	3,673		$	—

Supplemental Cash Flow Information Related to Leases

Supplemental cash flow information related to leases during the years ended December 31, 2023, 2022 and 2021 respectively, is as follows:

	2023			2022			2021
Operating cash flows from operating leases	$	(29,016	)	$	(22,775	)	$	(22,591	)
Operating cash flows from finance leases		(24	)		—			—
Financing cash flows from finance leases		(84	)		—			—
Lease liabilities arising from obtaining new operating lease assets		24,808			57,618			24,191
Lease liabilities arising from obtaining new finance lease assets		3,757			—			—

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Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2023

Payables and Accruals [Abstract]

Accrued Expenses

Accrued expenses at December 31, 2023 and 2022 were as follows:

	2023		2022
Insurance	$	12,521	$	17,808
Payroll and employee benefits		11,986		2,062
Contract reserves		3,964		966
Fuel hedge contracts		2,918		638
Interest		2,388		1,469
Income and other taxes		1,900		1,419
Finance lease liabilities		1,047		—
Other		637		5,107
Total accrued expenses	$	37,361	$	29,469

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Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Long-term debt at December 31, 2023 and 2022 were as follows:

	2023		2022
Revolving credit facility	$	90,000	$	—
2029 Notes		322,070		321,521
Total	$	412,070	$	321,521

Maturities of Long-Term Debt

The scheduled principal payments through the maturity date of the Company’s long-term debt at December 31, 2023, are as follows:

Years Ending December 31,
2024	$	—
2025		—
2026		—
2027		90,000
2028		—
Thereafter		325,000
Total	$	415,000

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Fair Values of Financial Instruments and Nonfinancial Assets and Liabilities Measured at the Reporting Date

The fair values of these financial instruments are summarized as follows:

		Fair Value at
	Fair Value
	Hierarchy	December 31, 2023				December 31, 2022
	Levels	Assets		Liabilities		Assets		Liabilities
Derivatives designated as cash flow hedging instruments:
Fuel hedge contracts	2	$	—	$	2,918	$	—	$	638
Foreign currency exchange hedge contracts	2		358		—		831		6
Total derivatives		$	358	$	2,918	$	831	$	644

Changes in Components of Accumulated Other Comprehensive Income (Loss)

Changes in the components of the accumulated balances of other comprehensive income (loss) are as follows:

	2023			2022			2021
Derivatives:
Fuel Hedge Contracts
Reclassification of derivative (gains) losses to earnings—net of tax	$	861		$	(10,629	)	$	(6,481	)
Change in fair value of derivatives—net of tax		(2,565	)		9,681			5,653
Net change in cash flow derivative fuel hedges—net of tax	$	(1,704	)	$	(948	)	$	(828	)
Foreign Currency Exchange Hedge Contracts
Reclassification of derivative (gains) losses to earnings—net of tax	$	(400	)	$	116		$	—
Change in fair value of derivatives—net of tax		280			501			—
Net change in cash flow derivative foreign currency hedges—net of tax		(120	)		617			—
Total net change in cash flow derivative hedges—net of tax	$	(1,824	)	$	(331	)	$	(828	)

Adjustments Reclassified from Accumulated Balances Other Comprehensive Income (Loss) to Earnings

Adjustments reclassified from accumulated balances of other comprehensive income (loss) to earnings are as follows:

	Statements of operations location	2023		2022			2021
Derivatives:
	Costs of contract revenues	$	1,152	$	(14,219	)	$	(8,670	)
	Income tax (provision) benefit		291		(3,590	)		(2,189	)
		$	861	$	(10,629	)	$	(6,481	)

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Income tax Provision (Benefit)

	2023		2022			2021
Income tax provision (benefit)	$	4,406	$	(9,360	)	$	13,391

Income (Loss) before Income Tax from Domestic and Foreign Operations

	2023			2022			2021
Domestic operations	$	19,549		$	(43,179	)	$	65,708
Foreign operations		(1,237	)		(236	)		(2,885	)
Total income (loss) before income tax	$	18,312		$	(43,415	)	$	62,823

Provision (Benefit) for Income Taxes

	2023		2022			2021
Federal:
Current	$	—	$	—		$	—
Deferred		3,292		(9,754	)		11,020
State:
Current		422		(90	)		1,080
Deferred		442		484			1,291
Foreign:
Current		250		—			—
Deferred		—		—			—
Total	$	4,406	$	(9,360	)	$	13,391

Income Tax Provision (benefit) Reconciliation

	2023			2022			2021
Tax provision (benefit) at statutory U.S. federal income tax rate	$	3,846		$	(9,117	)	$	13,193
State income tax — net of federal income tax benefit		774			(3,952	)		2,144
Adjustment to deferred tax depreciation		—			—			(1,414	)
Stock based compensation		315			(414	)		(1,318	)
Nondeductible officer compensation		178			244			1,195
Research and development tax credits		(796	)		(518	)		(642	)
Changes in valuation allowance		—			4,365			—
Other		89			32			233
Income tax provision (benefit)	$	4,406		$	(9,360	)	$	13,391

Deferred Tax Assets (Liabilities)

	2023			2022
Deferred tax assets:
Operating lease assets	$	23,685		$	23,200
Accrued liabilities		7,378			5,381
Federal NOLs and interest limitations		4,979			15,042
Foreign NOLs		—			24
State NOLs		9,953			10,291
Research costs		5,193			3,175
Tax credit carryforwards		5,457			4,411
Valuation allowance		(6,558	)		(6,012	)
Total deferred tax assets		50,087			55,512
Deferred tax liabilities:
Depreciation and amortization		(88,906	)		(91,923	)
Operating lease liabilities		(23,245	)		(22,657	)
Other liabilities		(168	)		(47	)
Total deferred tax liabilities		(112,319	)		(114,627	)
Net noncurrent deferred tax liabilities	$	(62,232	)	$	(59,115	)

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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Stock Option Activity

A summary of stock option activity under the Incentive Plan as of December 31, 2023, and changes during the year ended December 31, 2023, is presented below:

Options	Shares			Weighted Average Exercise Price		Weighted-Average Remaining Contract Term (yrs)		Aggregate Intrinsic Value ($000's)
Outstanding as of January 1, 2023		76		$	7.61
Granted		—			—
Exercised		—			—
Forfeited or Expired		(11	)		7.56
Outstanding as of December 31, 2023		65		$	7.62		0.4	$	4
Vested at December 31, 2023		65		$	7.62		0.4	$	4

Summary of Non-Vested Restricted Stock Units

A summary of the status of the Company’s non-vested RSUs as of December 31, 2023, and changes during the year ended December 31, 2023, is presented below:

Non-vested Restricted Stock Units	Shares			Weighted-Average Grant-Date Fair Value
Outstanding as of January 1, 2023		1,107		$	12.62
Granted		825			5.87
Vested		(253	)		11.35
Forfeited		(69	)		7.90
Outstanding as of December 31, 2023		1,610		$	8.68
Expected to vest at December 31, 2023		1,541		$	8.72

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Revenue (Tables)

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Summary of Type of Work and Customer, Contract Revenues

The following table sets forth, by type of work, the Company’s contract revenues for the years ended December 31, 2023, 2022 and 2021:

Revenues	2023		2022		2021
Dredging:
Capital—U.S.	$	186,715	$	342,461	$	397,034
Capital—foreign		—		149		6,596
Coastal protection		196,343		192,567		169,678
Maintenance		187,586		98,077		132,551
Rivers & lakes		16,318		15,527		20,290
Total dredging revenues	$	586,962	$	648,781	$	726,149
Offshore Wind:
Offshore Wind		2,663		—		—
Total revenues	$	589,625	$	648,781	$	726,149

The following table sets forth, by type of customer, the Company’s contract revenues for the years ended December 31, 2023, 2022 and 2021:

Revenues	2023		2022		2021
Dredging:
Federal government	$	438,790	$	431,705	$	568,980
State and local government		129,583		207,033		118,712
Private		18,589		9,894		31,861
Foreign		—		149		6,596
Total dredging revenues	$	586,962	$	648,781	$	726,149
Offshore wind:
Offshore wind		2,663		—		—
Total revenues	$	589,625	$	648,781	$	726,149

Schedule of Accounts Receivable

Accounts receivable at December 31, 2023 and December 31, 2022 are as follows:

	2023			2022
Completed contracts	$	2,920		$	4,682
Contracts in progress		40,743			32,546
Retainage		11,511			8,226
		55,174			45,454
Allowance for doubtful accounts		(364	)		(564	)
Total accounts receivable—net	$	54,810		$	44,890

Components of Contracts in Progress

The components of contracts in progress at December 31, 2023 and December 31, 2022 are as follows:

	2023			2022
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	206,330		$	262,125
Amounts billed		(196,520	)		(210,068	)
Costs and earnings in excess of billings for contracts in progress		9,810			52,057
Costs and earnings in excess of billings for completed contracts		58,925			14,972
Total contract revenues in excess of billings	$	68,735		$	67,029
Current portion of contract revenues in excess of billings	$	68,735		$	65,922
Long-term contract revenues in excess of billings		—			1,107
Total contract revenues in excess of billings	$	68,735		$	67,029
Billings in excess of costs and earnings:
Amounts billed	$	(258,948	)	$	(95,013	)
Costs and earnings for contracts in progress		229,388			85,099
Total billings in excess of contract revenues	$	(29,560	)	$	(9,914	)

Summary of Revenues and Gross Profit from Foreign Project Operations

The Company derived revenues and gross loss from foreign project operations for the years ended December 31, 2023, 2022, and 2021, as follows:

	2023			2022			2021
Contract revenues	$	—		$	149		$	6,596
Costs of contract revenues		(1,142	)		(341	)		(9,281	)
Gross loss	$	(1,142	)	$	(192	)	$	(2,685	)

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Nature of Business and Summary of Significant Accounting Policies (Estimated Useful Lives By Class of Assets) (Details)	Dec. 31, 2023
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Useful life	10 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	5 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	10 years
Vehicles, Dozers, And Other Light Operating Equipment And Systems [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Vehicles, Dozers, And Other Light Operating Equipment And Systems [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	5 years
Heavy Operating Equipment (Dredges And Barges) [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	10 years
Heavy Operating Equipment (Dredges And Barges) [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	30 years

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Nature of Business and Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) Segment	Dec. 31, 2022 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating Segments | Segment	1
Number of reportable segments | Segment	1
Number of reportable segment with goodwill | Segment	1
Percentage of fair value of reporting unit in excess of carrying value	10.00%
Gain associated with the termination of an offshore wind contract | $	$ 7,400
Gains on disposals of assets | $	100	$ 400
Loss related to the retirement of asset | $	$ 886	$ 8,150
Quantitative threshold	5.00%
Percentage of income taxes paid (net of refunds received)	5.00%

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Earnings (Loss) Per Share - (Computations for Basic and Diluted Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings (Loss) Per Share [Abstract]
Net income (loss)	$ 13,906	$ (34,055)	$ 49,432
Weighted-average common shares outstanding — basic	66,469	66,051	65,587
Effect of stock options and restricted stock units	488		714
Weighted-average common shares outstanding — diluted	66,957	66,051	66,301
Earnings (loss) per share -- basic	$ 0.21	$ (0.52)	$ 0.75
Earnings (loss) per share -- diluted	$ 0.21	$ (0.52)	$ 0.75

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Earnings (Loss) Per Share - (Narrative) (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Anti-dilutive Due to Period Loss [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and restricted stock, excluded from computation of earnings per share		462
Anti-dilutive Due to Treasury Stock Method [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and restricted stock, excluded from computation of earnings per share	430	351	1

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Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,099,380	$ 1,022,222
Accumulated depreciation	(484,772)	(478,312)
Property and equipment — net	614,608	543,910
Land [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	9,348	9,348
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	1,314	1,314
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	20,090	19,986
Operating Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,068,628	$ 991,574

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Property and Equipment (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Loss related to the retirement of asset	$ 886	$ 8,150
Depreciation expense	42,525	46,273	$ 43,016
Operating Equipment [Member]
Property, Plant and Equipment [Line Items]
Operating equipment excluded from property and equipment held for sale	$ 2,227	$ 500

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Leases - Additional Information (Details) - USD ($) $ in Millions		12 Months Ended
	Nov. 01, 2023	Dec. 31, 2023
Leases [Abstract]
Sale leaseback transaction, date		November 1, 2023
Gross cash proceeds	$ 29.5
Sale leaseback transaction, lease term		7 years
Annual rental rate	$ 4.2
Sale leaseback transaction, lease terms		Under the leaseback agreement, the Company has the option to i) purchase the Property after six years with an early buyout option; ii) purchase the Property at the end of the lease at the then fair value; iii) renew the lease at the then fair market value or iv) return the Property to the purchaser.

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Leases - (Schedule of Lease Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease costs	$ 29,945	$ 24,224	$ 24,427
Finance Lease costs
Amortization of finance lease assets	95
Interest expense on lease liabilities	24
Short-term lease costs	68,119	94,842	95,957
Total lease cost	$ 98,183	$ 119,066	$ 120,384

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Leases - (Schedule of Maturity Analysis of Operating Lease and Financing Lease Liabilities) (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Operating
2024	$ 31,465
2025	23,751
2026	12,843
2027	10,984
2028	9,601
Thereafter	12,574
Minimum lease payments	101,218
Imputed interest	(11,087)
Present value of minimum lease liabilities	90,131
Financing
2024	1,291
2025	1,291
2026	1,216
2027	355
Minimum lease payments	4,153
Imputed interest	(480)
Present value of minimum lease liabilities	$ 3,673

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Leases - (Schedule of Additional Information Related to Leases) (Details)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating
Weighted average remaining lease term (years)	4 years 6 months	4 years 2 months 12 days	4 years 4 months 24 days
Weighted average discount rate	5.60%	4.70%	5.10%
Finance
Weighted average remaining lease term (years)	3 years 3 months 18 days
Weighted average discount rate	7.90%

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Leases - (Supplemental Balance Sheet Information Related to Finance Leases) (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Finance lease assets:
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent
Other noncurrent assets	$ 3,757
Accumulated depreciation	(95)
Total other noncurrent assets	$ 3,662
Finance lease liabilities:
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Liabilities
Accrued expenses	$ 1,047
Other noncurrent liabilities	2,626
Present value of minimum lease liabilities	$ 3,673

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Leases - (Supplemental Cash Flow Information Related to Leases) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating cash flows from operating leases	$ (29,016)	$ (22,775)	$ (22,591)
Operating cash flows from finance leases	(24)
Financing cash flows from finance leases	(84)
Lease liabilities arising from obtaining new operating lease assets	24,808	$ 57,618	$ 24,191
Lease liabilities arising from obtaining new finance lease assets	$ 3,757

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Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Insurance	$ 12,521	$ 17,808
Payroll and employee benefits	11,986	2,062
Contract reserves	3,964	966
Fuel hedge contracts	2,918	638
Interest	2,388	1,469
Income and other taxes	1,900	1,419
Finance lease liabilities	1,047
Other	637	5,107
Total accrued expenses	$ 37,361	$ 29,469

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Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Revolving credit facility	$ 90,000
Long term debt	412,070	$ 321,521
2029 Notes [Member]
Debt Instrument [Line Items]
Senior Notes	$ 322,070	$ 321,521

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Long-Term Debt (Narrative) (Details) - USD ($)		1 Months Ended	12 Months Ended
	Jul. 29, 2022	May 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Minimum fixed charge coverage ratio per covenant	1.10%
Debt instrument covenant description			The springing financial covenant is triggered when the undrawn availability of the Amended Credit Agreement is less than 12.5% of the maximum loan amount for five consecutive days.
Revolving credit facility			$ 90,000,000	$ 0
Letters of credit outstanding			49,777,000	16,391,000
Letter of credit remaining borrowing capacity			$ 122,320,000	245,713,000
Debt instruments weighted average interest rate			6.71%
Line of credit facility suppressed capacity			$ 37,903,000	37,897,000
Debt instrument, face amount		$ 325,000,000
Maturity date		Jun. 01, 2029
Amortization of deferred financing fees			$ 965,000	$ 1,142,000	$ 1,382,000
2029 Notes [Member]
Debt Instrument [Line Items]
Debt instrument, face amount		$ 325,000,000
Debt instrument, interest rate, stated percentage		5.25%
Maturity date		Jun. 01, 2029
8.000% Senior Notes Due in 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount		$ 325,000,000
Debt instrument, interest rate, stated percentage		8.00%
Owned Domestic Subsidiaries Percent		100.00%
Green Loan Advance Rates [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.05%
Minimum [Member] | Domestic Rate [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.25%
Minimum [Member] | Daily Simple SOFR Rate [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.25%
Maximum [Member] | Domestic Rate [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.75%
Maximum [Member] | Daily Simple SOFR Rate [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.75%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300,000,000
Line of credit facility optional increase capacity	$ 100,000,000
Maximum covenant percentage of undrawn availability of amended credit agreement	12.50%
Revolving Credit Facility [Member] | Domestic Rate [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.50%
Revolving Credit Facility [Member] | Daily Simple SOFR Rate [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Green Loan Option [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 35,000,000

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Long-Term Debt (Maturities of Long-Term Debt) (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Debt Disclosure [Abstract]
2027	$ 90,000
Thereafter	325,000
Total	$ 415,000

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Fair Value Measurements (Schedule of Fair Values of Financial Instruments and Nonfinancial Assets and Liabilities Measured at the Reporting Date) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives assets	$ 358	$ 831
Derivatives liabilities	2,918	644
Fuel Hedge Contracts [Member] | Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives liabilities	2,918	638
Foreign Currency Exchange Hedge Contracts [Member] | Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives assets	$ 358	831
Derivatives liabilities		$ 6

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Fair Value Measurements (Narrative) (Details) gal in Millions	1 Months Ended	12 Months Ended
	May 31, 2021 USD ($)	Dec. 31, 2023 USD ($) $ / gal € / shares gal	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Derivatives Fair Value [Line Items]
Debt instrument, face amount	$ 325,000,000
Maturity date	Jun. 01, 2029
Fair Value, Inputs, Level 1 [Member]
Derivatives Fair Value [Line Items]
Fair value of debt		$ 276,315,000
Fuel Hedge Contracts [Member]
Derivatives Fair Value [Line Items]
Derivative underlying hedge percent		80.00%
Derivative, Nonmonetary Notional Amount, Volume | gal		13.0
Fair value hedge liabilities		$ 2,918,000	$ 638,000
Reclassification of derivative (gains) losses to earnings net of tax		$ 861,000	10,629,000	$ 6,481,000
Fuel Hedge Contracts [Member] | Minimum [Member]
Derivatives Fair Value [Line Items]
Fixed price range | $ / gal		2.35
Fuel Hedge Contracts [Member] | Maximum [Member]
Derivatives Fair Value [Line Items]
Fixed price range | $ / gal		2.9
Foreign Currency Exchange Hedge Contracts [Member]
Derivatives Fair Value [Line Items]
Fair value hedge liabilities		$ 0	6,000
Fair value hedge assets		358,000	831,000
Reclassification of derivative (gains) losses to earnings net of tax		400,000	(116,000)
Derivative notional amount		18,600,000
Reclassification of derivative (gains) losses to earnings net of cash settlements and taxes		$ (289,000)	$ 155,000
Foreign Currency Exchange Hedge Contracts [Member] | Minimum [Member]
Derivatives Fair Value [Line Items]
Fixed price range | € / shares		1.01
Foreign Currency Exchange Hedge Contracts [Member] | Maximum [Member]
Derivatives Fair Value [Line Items]
Fixed price range | € / shares		1.13

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Fair Value Measurements (Changes in Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivatives Fair Value [Line Items]
Net change in cash flow derivative hedges-net of tax	[1]	$ (1,824)	$ (331)	$ (828)
Total other comprehensive income (loss)		(1,824)	(331)	(828)
Fuel Hedge Contracts [Member]
Derivatives Fair Value [Line Items]
Reclassification of derivative (gains) losses to earnings—net of tax		(861)	(10,629)	(6,481)
Change in fair value of derivatives—net of tax		(2,565)	9,681	5,653
Net change in cash flow derivative hedges-net of tax		(1,704)	(948)	(828)
Foreign Currency Exchange Hedge Contracts [Member]
Derivatives Fair Value [Line Items]
Reclassification of derivative (gains) losses to earnings—net of tax		(400)	116
Change in fair value of derivatives—net of tax		280	501
Net change in cash flow derivative hedges-net of tax		(120)	617
Total other comprehensive income (loss)		$ (1,824)	$ (331)	$ (828)

[1] Net of income tax benefit of $616, $112 and $280 for the years ended December 31, 2023, 2022 and 2021, respectively.

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Fair Value Measurements (Adjustments Reclassified from Accumulated Balances Other Comprehensive Income (Loss) to Earnings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments Gain Loss [Line Items]
Other expense	$ 2,233	$ (1,571)	$ 994
Costs of contract revenues	511,893	617,608	580,879
Income tax (provision) benefit	(4,406)	9,360	(13,391)
Net income (loss)	(13,906)	34,055	(49,432)
Accumulated Gain Loss Net Cash Flow Hedge Parent [Member] | Reclassification Out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments Gain Loss [Line Items]
Costs of contract revenues	1,152	(14,219)	(8,670)
Income tax (provision) benefit	291	(3,590)	(2,189)
Net income (loss)	$ 861	$ (10,629)	$ (6,481)

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Income Taxes (Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ 4,406	$ (9,360)	$ 13,391

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Income Taxes (Income (Loss) before Income Tax from Domestic and Foreign Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Domestic operations	$ 19,549	$ (43,179)	$ 65,708
Foreign operations	(1,237)	(236)	(2,885)
Total income (loss) before income tax	$ 18,312	$ (43,415)	$ 62,823

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Income Taxes (Provision (Benefit) for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Deferred federal tax expense (benefit)	$ 3,292	$ (9,754)	$ 11,020
Current state tax expense (benefit)	422	(90)	1,080
Deferred state tax expense (benefit)	442	484	1,291
Current foreign tax expense (benefit)	250
Income tax provision (benefit)	$ 4,406	$ (9,360)	$ 13,391

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Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
U.S. federal statutory income tax rate	21.00%	21.00%	21.00%
Operating loss carryforwards indefinitely	$ 13,016,000
Operating loss carryforwards, limitations on use	The Company also has indefinite life carryforwards as a result of interest limitations. Starting in 2022, the Company has research costs attributable to research and development that are currently expensed but are required to be capitalized for U.S. tax purposes and amortized primarily over 5 or 15 years.
Period of unrecognized tax benefits not expected to be changed	12 months
Interest and penalties recorded	$ 0	$ 0	$ 0
Proposed global minimum tax percentage	15.00%
Deferred tax assets valuation allowance	$ 6,558,000	6,012,000
Minimum [Member]
Operating Loss Carryforwards [Line Items]
Research and development expense amortized period	5 years
Maximum [Member]
Operating Loss Carryforwards [Line Items]
Research and development expense amortized period	15 years
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Loss carryforwards for federal income tax purposes	$ 14,012,000	54,376,000
Operating loss carryforwards expiration amount	$ 996,000
Operating loss carryforwards expiration year	2037
Deferred tax assets valuation allowance	$ 0	0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Loss carryforwards for federal income tax purposes	182,445,000	188,884,000
Valuation allowance for net operating loss carryforwards	$ 6,558,000	$ 5,988,000
State and Local Jurisdiction [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards expiration year	2027
State and Local Jurisdiction [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards expiration year		2043
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Loss carryforwards for federal income tax purposes	$ 0	$ 69,000
Valuation allowance for net operating loss carryforwards	$ 0	$ 24,000
Foreign Tax Authority [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards expiration year	2023
Foreign Tax Authority [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards expiration year	2028

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Income Taxes (Income Tax Provision (benefit) Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Tax provision at statutory U.S. federal income tax rate	$ 3,846	$ (9,117)	$ 13,193
State income tax — net of federal income tax benefit	774	(3,952)	2,144
Adjustment to deferred tax depreciation			(1,414)
Stock based compensation	315	(414)	(1,318)
Nondeductible officer compensation	178	244	1,195
Research and development tax credits	(796)	(518)	(642)
Changes in valuation allowance		4,365
Other	89	32	233
Income tax provision (benefit)	$ 4,406	$ (9,360)	$ 13,391

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Income Taxes (Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Operating lease assets	$ 23,685	$ 23,200
Accrued liabilities	7,378	5,381
Federal NOLs and interest limitations	4,979	15,042
Foreign NOLs		24
State NOLs	9,953	10,291
Research costs	5,193	3,175
Tax credit carryforwards	5,457	4,411
Valuation allowance	(6,558)	(6,012)
Total deferred tax assets	50,087	55,512
Depreciation and amortization	(88,906)	(91,923)
Operating lease liabilities	(23,245)	(22,657)
Other liabilities	(168)	(47)
Total deferred tax liabilities	(112,319)	(114,627)
Net noncurrent deferred tax liabilities	$ (62,232)	$ (59,115)

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Share-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
	May 11, 2017	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	May 05, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 6,316	$ 4,288	$ 5,188
Number of stock options exercised		0
Total unrecognized compensation cost related to non-vested RSUs		$ 6,661
Amount related to shares used for tax withholding obligations		$ 560	$ 2,185
Annual retainer per non-employee director, percentage paid in cash		50.00%
Annual retainer per non-employee director, percentage paid in common stock		50.00%
Shares of common stock received by employee directors		56,000	106,000	50,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights		RSUs primarily vest in equal portions over the three year vesting period.
Vesting period		3 years
Total unrecognized compensation cost, weighted-average period of recognition		1 year 10 months 24 days
Non Qualified Stock Options (NQSO) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights		The option awards generally vest in three equal annual installments commencing on the first anniversary of the grant date
Exercise period		10 years
Awards granted in period		0	0	0
Aggregate intrinsic value of stock options exercised			$ 212	$ 1,351
Employees and Directors [Member] | 2017 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant	3,300,000				1,500,000
Employees and Directors [Member] | 2007 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Underlying equity awards issued	1,700,000
Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual retainer per non-employee director		$ 160
Chairman of the Board [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional annual retainer paid to non-employee director		$ 100
Additional percentage of annual retainer paid to non-employee director in common stock		100.00%

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Share-Based Compensation (Summary of Stock Option Activity) (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Share-Based Payment Arrangement [Abstract]
Outstanding as of January 1, 2023 | shares	76
Forfeited or Expired | shares	(11)
Outstanding as of December 31, 2023 | shares	65
Vested at December 31, 2023 | shares	65
Weighted average exercise price outstanding as of January 1, 2023 | $ / shares	$ 7.61
Weighted average exercise price, forfeited or expired | $ / shares	7.56
Weighted average exercise price outstanding as of December 31, 2023 | $ / shares	7.62
Weighted average exercise price, vested at December 31, 2023 | $ / shares	$ 7.62
Weighted average remaining contractual term, outstanding at December 31, 2023	4 months 24 days
Weighted average remaining contractual term, vested as of December 31, 2023	4 months 24 days

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Share-Based Compensation (Summary of Non-Vested Restricted Stock Units) (Details) - Restricted Stock Units (RSUs) [Member] shares in Thousands	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding as of January 1, 2023 | shares	1,107
Options granted | shares	825
Options vested | shares	(253)
Options forfeited | shares	(69)
Options outstanding as of December 31, 2023 | shares	1,610
Options expected to vest at December 31, 2023 | shares	1,541
Weighted-average grant-date fair value as of January 1, 2023 | $ / shares	$ 12.62
Weighted-average grant-date fair value, granted | $ / shares	5.87
Weighted-average grant-date fair value, vested | $ / shares	11.35
Weighted-average grant-date fair value, forfeited | $ / shares	7.90
Weighted-average grant-date fair value as of December 31, 2023 | $ / shares	8.68
Weighted-average grant-date fair value, expected to vest at December 31, 2023 | $ / shares	$ 8.72

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Revenue (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Performance obligations exclude from dredging backlog	$ 44,600,000
Revenue, remaining performance obligation	$ 1,040,000,000.00
Percentage of performance obligation to be recognized as revenue	60.00%
Performance obligation, expected to be recognized as revenue year	2024
Amortization on pre-contract and pre-construction costs	$ 11,474,000	$ 11,148,000
Contract revenues	589,625,000	648,781,000	$ 726,149,000
Long-lived assets, net book value	$ 0	0
Increased gross profit		$ 22,276,000
Dredging [Member] | Use of Equipment [Member] | Federal Government [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Contract revenues			$ 716,000
Dredging [Member] | Sales [Member] | Geographic Concentration Risk [Member] | Middle East [Member] | Maximum [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage	1.00%	1.00%	1.00%
Dredging [Member] | Sales [Member] | Federal Government Agencies [Member] | Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage	75.00%	67.00%	78.00%
Dredging [Member] | Accounts Receivable [Member] | Geographic Concentration Risk [Member] | Middle East [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage	0.00%	9.00%
Dredging [Member] | Accounts Receivable [Member] | Federal Government Agencies [Member] | Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage	36.00%	46.00%
Other Current Assets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Costs to fulfill contracts with customers recognized as an asset	$ 18,138,000	$ 4,472,000
Other Noncurrent Assets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Costs to fulfill contracts with customers recognized as an asset	$ 4,028,000	$ 0

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Revenue (Summary of Type of Work, Contract Revenues) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 589,625	$ 648,781	$ 726,149
Type of Work [Member] | Operating Segment [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	589,625	648,781	726,149
Type of Work [Member] | Operating Segment [Member] | Dredging [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	586,962	648,781	726,149
Type of Work [Member] | Operating Segment [Member] | Dredging [Member] | Capital-U.S. [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	186,715	342,461	397,034
Type of Work [Member] | Operating Segment [Member] | Dredging [Member] | Capital-Foreign [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		149	6,596
Type of Work [Member] | Operating Segment [Member] | Dredging [Member] | Coastal Protection [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	196,343	192,567	169,678
Type of Work [Member] | Operating Segment [Member] | Dredging [Member] | Maintenance [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	187,586	98,077	132,551
Type of Work [Member] | Operating Segment [Member] | Dredging [Member] | Rivers & Lakes [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	16,318	$ 15,527	$ 20,290
Type of Work [Member] | Operating Segment [Member] | Offshore Wind [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,663

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Revenue (Summary of Type of Customer, Contract Revenues) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 589,625	$ 648,781	$ 726,149
Foreign [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		149	6,596
Type of Customer [Member] | Operating Segment [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	589,625	648,781	726,149
Type of Customer [Member] | Operating Segment [Member] | Dredging [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	586,962	648,781	726,149
Type of Customer [Member] | Operating Segment [Member] | Dredging [Member] | Federal Government [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	438,790	431,705	568,980
Type of Customer [Member] | Operating Segment [Member] | Dredging [Member] | State and Local Government [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	129,583	207,033	118,712
Type of Customer [Member] | Operating Segment [Member] | Dredging [Member] | Private [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	18,589	9,894	31,861
Type of Customer [Member] | Operating Segment [Member] | Dredging [Member] | Foreign [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 149	$ 6,596
Type of Customer [Member] | Operating Segment [Member] | Offshore Wind [Member]
Disaggregation Of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,663

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Revenue (Schedule of Accounts Receivable) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Receivables [Abstract]
Completed contracts	$ 2,920	$ 4,682
Contracts in progress	40,743	32,546
Retainage	11,511	8,226
Accounts receivable, gross	55,174	45,454
Allowance for doubtful accounts	(364)	(564)
Total accounts receivable—net	$ 54,810	$ 44,890

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Revenue (Components of Contracts in Progress) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Costs and earnings in excess of billings for contracts in progress	$ 9,810	$ 52,057
Costs and earnings in excess of billings for completed contracts	58,925	14,972
Total contract revenues in excess of billings	68,735	67,029
Current portion of contract revenues in excess of billings	68,735	65,922
Long-term contract revenues in excess of billings		1,107
Total billings in excess of contract revenues	(29,560)	(9,914)
Costs And Earnings In Excess Of Billings [Member]
Accounts Notes And Loans Receivable [Line Items]
Costs and earnings for contracts in progress	206,330	262,125
Amounts billed	(196,520)	(210,068)
Billings In Excess Of Costs And Earnings [Member]
Accounts Notes And Loans Receivable [Line Items]
Costs and earnings for contracts in progress	229,388	85,099
Amounts billed	$ (258,948)	$ (95,013)

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Revenue (Summary of Gross Profit from Foreign Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Contract revenues	$ 589,625	$ 648,781	$ 726,149
Costs of contract revenues	(511,893)	(617,608)	(580,879)
Gross profit	77,732	31,173	145,270
Foreign [Member]
Disaggregation Of Revenue [Line Items]
Contract revenues		149	6,596
Costs of contract revenues	(1,142)	(341)	(9,281)
Gross profit	$ (1,142)	$ (192)	$ (2,685)

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Retirement Plans (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) Item	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Defined Contribution Plan Disclosure [Line Items]
Number of sponsored 401(k) plans | Item	2
Expense for matching and discretionary contributions	$ 4,757	$ 2,996	$ 4,659
Contributes to various multiemployer pension plans	$ 5,153	$ 4,915	$ 4,632
Maximum [Member]
Defined Contribution Plan Disclosure [Line Items]
Multiemployer plans collective-bargaining arrangement percentage of contributions	5.00%

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Commitments and Contingencies (Narrative) (Details) - USD ($)			12 Months Ended
	Apr. 24, 2023	Apr. 11, 2022	Dec. 31, 2023
Commitments And Contingencies [Line Items]
Outstanding performance bonds			$ 960,906,000
Revenue value remaining from outstanding performance bonds			546,759,000
One-time payment amount	$ 1,250,000
Disbursement amount from litigation escrow account	680,000
Expected funds to be released in connection with pre-purchase construction project	$ 800,000
Benefit in cost of contract revenues			2,410,000
Other income related to settlement			784,000
Proceeds from legal settlements			1,930,000
Litigation settlement amount yet to released			800,000
Indemnification Commitment [Member]
Commitments And Contingencies [Line Items]
Aggregate demolition surety performance bond		$ 21,934,000
Minimum [Member]
Commitments And Contingencies [Line Items]
Bids bond range			$ 1,000,000
Warranty periods			1 year
Maximum [Member]
Commitments And Contingencies [Line Items]
Bids bond range			$ 10,000,000
Warranty periods			3 years

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Schedule II-Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 6,576	$ 3,051	$ 3,037
Additions	546	3,525	14
Deductions	200
Ending Balance	6,922	6,576	3,051
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	564	564	564
Deductions	200
Ending Balance	364	564	564
Valuation Allowance for Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	6,012	2,487	2,473
Additions	546	3,525	14
Ending Balance	$ 6,558	$ 6,012	$ 2,487