Employee Benefits

All of the Company's heavy civil marine construction segment employees except the Associate Divers, the Associate Tugmasters, and union employees in the Pacific Northwest, are eligible to participate in the Company’s 401(k) Retirement Plan after completing six months of service. Each participant may contribute between 1% and 80% of eligible compensation on a pretax basis, up to the annual IRS limit. The Company matches 100% on the first 2% of eligible compensation contributed to the Plan and 50% on the next 2% of eligible compensation contributed to the Plan. Participants’ contributions are fully vested at all times. Employer matching contributions vest over a four-year period. At its discretion, the Company may make additional matching and profit-sharing contributions. During the years ended December 31, 2016, 2015 and 2014 the Company contributed $1.4 million, $1.4 million and $1.2 million to the Plan, respectively.

All of the Company's commercial concrete construction segment employees except Leads, Helpers, Laborers, Finishers, Formsetters, Carpenters, Rodbusters, Patchmen, Equipment Operators, Field Engineering Trainees and certain Highly Compensated Employees are eligible to participate in the AGC Southwest Chapters 401(k) Retirement Plan, a multiple employer plan, after completing three months of service. Each participant may contribute up to the annual IRS limit. The Company matches 50% on the first 6% of eligible compensation contributed to the Plan. Participants’ contributions are fully vested at all times. Employer matching contributions vest over a five-year period. At its discretion, the Company may make additional matching and profit-sharing contributions. During the year ended December 31, 2016 and 2015, the Company contributed $0.2 million and $0.1 million, respectively.

The Company's heavy civil marine construction segment contributes to several multiemployer defined pension plans under the terms of collective-bargaining agreements that cover its union-represented employees. Risks of participating in these multiemployer plans are different from single-employer plans in the following aspects:


•	Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers.


•	If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers.


•	If the Company chooses to stop participating in its multiemployer plans, it may be required to pay a withdrawal liability based on the underfunded status of the plan.

Currently, the Company's commercial concrete construction segment does not have union represented employees and, thus, does not participate under the above-mentioned defined pension plans, or any other plans, that cover union-represented employees.

The following table presents the Company's participation in these plans:



	Pension Plan	Pension Protection Act ("PPA")		FIP/RP								Expiration
Pension Trust	Employer	Certified Zone Status (1)		Status	Contributions						Surcharge	of Collective
Fund	Identification Number	2016	2015	P/I (2)	2016		2015		2014		Imposed	Bargaining Agreement
International Union of Operating Engineers - Employers Construction Industry Retirement Plan - Local 302 and 612 Trust Funds	91-6028571	Green	Green	N/A	$	2,158	$	1,518	$	1,295	—	2018
Associated General Contractors of Washington Carpenter, Piledrivers, and Millwrights	91-6029051 91-6029049	Green	Green	N/A	$	938	$	748	$	737	—	2018
Alaska Carpenters Trust Fund	92-0120866	Green	Green	N/A	$	889	$	807	$	1,044	—	2017
Alaska Laborers Trust Fund	91-6028298	Yellow	Orange	P	$	126	$	110	$	246	—	2017

1. The most recent PPA zone status available in 2016 and 2015 is for the plan's year end during 2015 and 2014, respectively. Zone status is based on information received from the plan and is indicative of the plans funding status. Among other factors, plans in the red zone are generally less than 65 percent funded, plans in the orange zone are less than 80 percent funded and have an Accumulated Funding Deficiency in the current year or projected into the next six years, plans in the yellow zone are less than 80 percent funded, and plans in the green zone are at least 80 percent funded.

2. The FIP/RP Status P/I column indicates plans for which a financial improvement plan ("FIP") or a rehabilitation plan ("RP") is either pending ("P"), or implemented ("I").

There are currently no plans to withdraw from any of the multiemployer plans in which the Company participates.