Regulatory Matters

12 Months Ended

Dec. 31, 2023

Regulated Operations [Abstract]

Regulatory Matters

NOTE 13. REGULATORY MATTERS

Regulatory Matters Involving Potential Loss Contingencies

As a result of issues generated in the ordinary course of business, the Companies are involved in various regulatory matters. Certain regulatory matters may ultimately result in a loss; however, as such matters are in an initial procedural phase, involve uncertainty as to the outcome of pending reviews or orders, and/or involve significant factual issues that need to be resolved, it is not possible for the Companies to estimate a range of possible loss. For regulatory matters that the Companies cannot estimate, a statement to this effect is made in the description of the matter. Other matters may have progressed sufficiently through the regulatory process such that the Companies are able to estimate a range of possible loss. For regulatory matters that the Companies are able to reasonably estimate a range of possible losses, an estimated range of possible loss is provided, in excess of the accrued liability (if any) for such matters. Any estimated range is based on currently available information, involves elements of judgment and significant uncertainties and may not represent the Companies’ maximum possible loss exposure. The circumstances of such regulatory matters will change from time to time and actual results may vary significantly from the current estimate. For current matters not specifically reported below, management does not anticipate that the outcome from such matters would have a material effect on the Companies’ financial position, liquidity or results of operations.

Other Regulatory Matters

Virginia Regulation – Key Legislation Affecting Operations

Regulation Act and Grid Transformation and Security Act of 2018

The Regulation Act enacted in 2007 instituted a cost-of-service rate model that authorizes stand-alone rate adjustment clauses for recovery of costs for new generation projects, FERC-approved transmission costs, underground distribution lines, environmental compliance, conservation and energy efficiency programs, renewable energy programs and nuclear license renewals, and also contains statutory provisions directing Virginia Power to file annual fuel cost recovery cases with the Virginia Commission.

If the Virginia Commission’s future rate decisions, including actions relating to Virginia Power’s rate adjustment clause filings, differ materially from Virginia Power’s expectations, it may adversely affect its results of operations, financial condition and cash flows.

The GTSA reinstated base rate reviews commencing with the 2021 Triennial Review. In the triennial review proceedings, earnings that were more than 70 basis points above the utility’s authorized ROE that might have been refunded to customers and served as the basis for a reduction in future rates, could be reduced by Virginia Commission-approved investment amounts in qualifying solar or wind generation facilities or electric distribution grid transformation projects that Virginia Power elected to include in a CCRO. The legislation declared that electric distribution grid transformation projects are in the public interest and provided that the costs of such projects may be recovered through a rate adjustment clause if not the subject of a CCRO. Any costs that were the subject of a CCRO were deemed recovered in base rates during the triennial period under review and could not be included in base rates in future triennial review proceedings. In any triennial review in which the Virginia Commission determined that the utility’s earnings were more than 70 basis points above its authorized ROE, base rates were subject to reduction prospectively and customer refunds would be due unless the total CCRO elected by the utility equaled or exceeded the amount of earnings in excess of the 70 basis points. For the purposes of measuring any customer refunds or CCRO amounts utilized under the GTSA, associated income taxes were factored into the determination of such amounts. In the 2021 Triennial Review, any such rate reduction was limited to $50 million. This section of the GTSA concerning base rate reviews was amended by 2023 legislation as discussed below.

Virginia 2020 Legislation

In April 2020, the Governor of Virginia signed into law the VCEA, which along with related legislation forms a comprehensive framework affecting Virginia Power’s operations. The VCEA replaces Virginia’s voluntary renewable energy portfolio standard for Virginia Power with a mandatory program setting annual renewable energy portfolio standard requirements based on the percentage of total electric energy sold by Virginia Power, excluding existing nuclear generation and certain new carbon-free resources, reaching 100% by the end of 2045. The VCEA includes related requirements concerning deployment of wind, solar and energy storage resources, as well as provides for certain measures to increase net-metering, including an allocation for low-income customers, incentivizes energy efficiency programs and provides for cost recovery related to participation in a carbon trading program. While the legislation affects several portions of Virginia Power’s operations, key provisions of the GTSA remained in effect, including the triennial review structure and timing, the use of the CCRO and the $50 million cap on revenue reductions in the first triennial review proceeding. Key provisions of the VCEA and related legislation passed include the following:

•Fossil Fuel Electric Generation: The legislation mandates Chesterfield Power Station Units 5 & 6 and Yorktown Power Station Unit 3 to be retired by the end of 2024, Altavista, Southampton and Hopewell to be retired by the end of 2028 and Virginia Power’s remaining fossil fuel units to be retired by the end of 2045, unless the retirement of such generating units will compromise grid reliability or security. The legislation also imposed a temporary moratorium on CPCNs for fossil fuel generation, unless the resources are needed for grid reliability. This temporary moratorium concluded in January 2022. In addition, the Virginia Commission shall determine the amortization period for recovery of any appropriate costs due to the early retirement of any electric generation facilities. Virginia Power revised the depreciable lives of Altavista, Southampton and Hopewell for the mandated retirement to the end of 2028, which did not have a material impact to Virginia Power’s results of operations or cash flows given the existing regulatory framework. This section of the VCEA concerning mandatory retirements of certain facilities by the end of 2028 was amended by 2023 legislation as discussed below. As a result, in November 2023 Virginia Power revised the depreciable lives of Altavista, Southampton and Hopewell and implemented useful life assumptions that were effective before the previous revision.

•Renewable Generation: The legislation provides a detailed renewable energy portfolio standard to achieve 100% zero-carbon generation by the end of 2045, excluding existing nuclear generation and certain new carbon-free resources. Components include requirements to petition the Virginia Commission for approval to construct or acquire new generating capacity to reach 16.1 GW of installed solar and onshore wind by the end of 2035, which includes specific requirements for utility-scale solar of 3.0 GW by the end of 2024, up to 15.0 GW by the end of 2035 and 1.1 GW of small-scale solar by the end of 2035. The legislation deems 2.7 GW of energy storage, including up to 800 MW for any one project which may include a pumped storage facility, by the end of 2035 to be in the public interest. The legislation also deems the construction or purchase of an offshore wind facility constructed off the Virginia coast with a capacity of up to 5.2 GW before 2035 to be in the public interest and provides certain presumptions facilitating cost recovery. The costs of such a facility constructed by the utility

with a capacity between 2.5 and 3.0 GW will be presumed reasonably and prudently incurred if the Virginia Commission finds that the project meets competitive procurement requirements, the projected cost of the facility does not exceed a specified industry benchmark and the utility commences construction by the end of 2023 or has a plan for the facility to be in service by the end of 2027. Projects to meet these requirements are subject to approval by the Virginia Commission.

•Energy Efficiency: The legislation includes an energy efficiency target of 5% energy savings, as measured from a 2019 baseline, through verifiable energy efficiency programs by the end of 2025 with future targets to be set by the Virginia Commission. Virginia Power has the opportunity to offset the lost revenues with margins on program spend if certain targets are achieved and can also seek recovery of the lost revenues associated with energy efficiency programs if such reductions are found to have caused Virginia Power to earn more than 50 basis points below a fair rate of return on its rates for generation and distribution services.

•Carbon trading program: The legislation authorizes Virginia to participate in a market-based carbon trading program consistent with RGGI through 2050. In January 2022, the Governor of Virginia issued an executive order which put directives in place to start administrative steps to withdraw Virginia from RGGI. In December 2023, the withdrawal took effect. All costs of the carbon trading program are recoverable through an environmental rider.

•Low-income customers: The legislation includes the establishment of a percentage of income payment program to be administered by the Virginia Department of Housing and Community Development and the Virginia Department of Social Services. To fund the program, Virginia Power will remit amounts collected from customers under a universal service fee established and set by the Virginia Commission. As such, this program will not affect Virginia Power’s results of operations, financial position or cash flows. In December 2020, the Virginia Commission issued a final order confirming a revenue requirement of $93 million related to this program. Implementation details and the effective date of the program would be established in future legislation prior to collection of fees from customers. In October 2023, the Virginia Commission approved the collection by Virginia Power of a universal service fee of $71 million from customers during the rate year beginning November 2023, including the impact on certain non-jurisdictional customers which follow Virginia Power’s jurisdictional customer rate methodology.

Virginia 2023 Legislation

In April 2023, legislation was enacted that amended several key provisions of the Regulation Act, as previously amended by the GTSA, and revised portions of the existing regulatory framework affecting Virginia Power’s operations.

The legislation resets the frequency of base rate reviews from a triennial period, as established under the GTSA, to a biennial period commencing with the 2023 Biennial Review. Such biennial reviews shall include the establishment of an authorized ROE to be utilized for base rates and riders, prospective base rates for the upcoming two-year period based on projected cost of service and a determination by the Virginia Commission as to Virginia Power’s base rate earned return for the most recently completed two-year period against the previously authorized ROE, including any potential credits to customers’ bills.

The legislation provides that the Virginia Commission will establish an authorized ROE of 9.70% for Virginia Power in the 2023 Biennial Review, reflecting the average authorized ROE of vertically integrated electric utilities by the applicable regulatory commissions in the peer group jurisdictions of Florida, Georgia, Texas, Tennessee, West Virginia, Kentucky and North Carolina. Subsequent to the 2023 Biennial Review, all provisions related to this peer group benchmarking expire and the Virginia Commission is authorized to utilize any methodology it deems to be consistent with the public interest to make future ROE determinations. In all future biennial reviews, if the Virginia Commission determines that Virginia Power’s existing base rates will, on a going-forward basis, produce revenues that are either in excess of or below its authorized rate of return, the Virginia Commission is authorized to reduce or increase such base rates, as applicable and necessary, to ensure that Virginia Power’s base rates are just and reasonable while still allowing Virginia Power to recover its costs and earn a fair rate of return. In addition, beginning with the biennial review to be filed in 2025, the Virginia Commission may, at its discretion, increase or decrease Virginia Power’s authorized ROE by up to 50 basis points based on factors that may include reliability, generating plant performance, customer service and operating efficiency, with the provisions applying to such adjustments to be determined in a future proceeding.

The legislation directs that if the Virginia Commission determines as part of the 2023 Biennial Review that Virginia Power has earned more than 70 basis points above its authorized ROE of 9.35% established in the 2021 Triennial Review that 85% of the amount of such earnings above this level be credited to customers’ bills. In future biennial reviews, beginning with the biennial review to be filed in 2025, 85% of any earnings determined by the Virginia Commission to be up to 150 basis points above Virginia Power’s authorized ROE shall be credited to customers’ bills as well as 100% of any earnings that are more than 150 basis points above Virginia Power’s authorized ROE. For the purposes of measuring any bill credits due to customers, associated income taxes are factored into the determination of such amounts. In addition, the legislation eliminates Virginia Power’s ability to utilize Virginia Commission-approved investment amounts in qualifying solar or wind generation facilities or electric distribution grid transformation projects as a CCRO to reduce or offset any earnings otherwise eligible for customer credits as previously permitted under the GTSA.

In addition to the biennial review mechanisms discussed above, the legislation also includes provisions related to other aspects of Virginia Power’s ratemaking framework.

•Riders into base rates: Virginia Power is required to combine certain riders with an aggregate annual revenue requirement of at least $350 million with its base rates effective July 2023. After such riders are combined, they will be considered as part of base rates for the purposes of the biennial review proceedings. The inclusion of such riders cannot serve as the basis for an increase in base rates as part of the 2023 Biennial Review.

•Rider consolidation: Upon determination by the Virginia Commission, certain riders, while remaining separate from base rates, may be consolidated for cost recovery and review purposes.

•Capitalization ratio: The legislation establishes that Virginia Power is required to undertake reasonable efforts to maintain a common equity capitalization to total capitalization ratio through December 2024 of 52.10%.

•Fuel cost securitization: Virginia Power is authorized, on or before July 2024, to petition the Virginia Commission for approval of a financing order for certain deferred fuel costs. Virginia Power is required to permit certain retail customers to opt out of any such deferred fuel cost securitization.

•Electric generation plant retirements: The Virginia Commission shall provide to the Virginia General Assembly, on an annual basis, a report that includes information concerning the reliability impacts of generation unit additions and retirement determinations, along with the potential impact on the purchase of power from generation assets outside of the Virginia jurisdiction, the result of which could impact the depreciable lives of Virginia Power’s electric generation facilities in future periods.

In addition, in May 2023 legislation was enacted that amended certain portions of the VCEA to qualify generation produced by Virginia Power’s biomass electric generating stations as renewable energy and eliminate the mandated retirement of such facilities by the end of 2028.

Virginia Power is incurring and expects to incur significant costs, including capital expenditures, to comply with the legislative requirements discussed above. The legislation allows for cost recovery under the existing or modified regulatory framework through rate adjustment clauses, rates for generation and distribution services or Virginia Power’s fuel factor, as approved by the Virginia Commission. Costs allocated to the North Carolina jurisdiction will be recovered, subject to approval by the North Carolina Commission, in accordance with the existing regulatory framework.

Virginia Regulation – Key Developments

2023 Biennial Review

In July 2023, Virginia Power filed its base rate case and accompanying schedules in support of the 2023 Biennial Review in accordance with legislation enacted in Virginia in April 2023 as discussed above. Virginia Power’s earnings test analysis, as filed, demonstrated it earned a combined ROE of 9.04% on its generation and distribution services for the test period, within 70 basis points of its authorized ROE of 9.35% established in the 2021 Triennial Review. Virginia Power did not request an increase in base rates for generation and distribution services and proposed that base rates remain at their existing level utilizing an ROE of 9.70% for the prospective test periods and a common equity capitalization to total capitalization ratio of 52.10%. Virginia Power noted that while its prospective test periods would result in a revenue deficiency, it did not request an increase to base rates given that the combination of certain riders with an aggregate annual revenue requirement of at least $350 million into base rates effective July 2023 cannot serve as the basis for an increase in base rates as part of the 2023 Biennial Review. The Virginia Commission will determine whether Virginia Power’s earnings for the test period, considered as a whole, were within 70 basis points above or below the authorized ROE of 9.35%. The Virginia Commission will also authorize an ROE of 9.70%, as directed by legislation enacted in Virginia in April 2023, for Virginia Power that will be applied to Virginia Power’s riders prospectively and that will also be utilized to measure base rate earnings for the 2025 Biennial Review.

In November 2023, Virginia Power, the Virginia Commission staff and other parties filed a comprehensive settlement agreement with the Virginia Commission for approval. The comprehensive settlement agreement indicates that Virginia Power demonstrated it earned a combined ROE of 9.05% on its generation and distribution services for the test period, requires previously unrecovered severe weather event costs of $45 million to be recovered through base rates during the 2023-2024 biennial period, with carrying costs, and provides for $15 million in one-time credits to customers by September 2024. This matter is pending.

Virginia Fuel Expenses

In May 2023, Virginia Power filed its annual fuel factor filing with the Virginia Commission to recover an estimated $2.3 billion in Virginia jurisdictional projected fuel expense for the rate year beginning July 1, 2023 and a projected $1.3 billion under-recovered balance as of June 30, 2023. The projected under-recovered balance includes $578 million representing the remaining two years of under-recovered balance as of June 30, 2022 being collected over a three-year period in accordance with the Virginia Commission’s approval of Virginia Power’s 2022 annual fuel factor as described above. Virginia Power proposed two alternatives to recover these

under-collected fuel costs. The first option reflects recovery of the total $3.3 billion fuel cost requirement over the July 2023 through June 2024 fuel period and results in an increase in Virginia Power’s fuel revenues of $631 million when applied to projected kilowatt-hour sales for the period. The second option proposed by Virginia Power incorporates its anticipated July 2023 application to the Virginia Commission for approval of a financing order to securitize up to the projected $1.3 billion under-recovered balance as of June 30, 2023 as permitted under legislation enacted in Virginia in April 2023. Under this option, Virginia Power proposed implementation of the current period fuel factor rate only effective July 2023 on an interim basis, while suspending implementation of the prior-period fuel factor rate pending the Virginia Commission’s consideration of the securitization petition. If approved by the Virginia Commission, the securitization option results in a net decrease in Virginia Power’s fuel revenues for the rate year of approximately $541 million. In addition, Virginia Power has proposed to alter the order in which revenue from certain customers who elect to pay market-based rates would be allocated between base rates and fuel, which if approved would result in a reduction to fuel revenue of $13 million. In May 2023, the Virginia Commission ordered that, in accordance with Virginia Power’s second proposed option, only the current period fuel factor rate be implemented effective July 2023 on an interim basis. This matter is pending.

In July 2023, Virginia Power filed an application with the Virginia Commission for approval of a financing order to securitize the projected $1.3 billion under-recovered fuel balance as of June 30, 2023 through the issuance of one or more tranches of bonds with tenors up to approximately ten years. In November 2023, the Virginia Commission approved Virginia Power’s request and issued a financing order authorizing Virginia Power to securitize $1.3 billion of under-recovered fuel costs through the issuance by a special purpose entity of one or more tranches of bonds with tenors of up to approximately seven years. In February 2024, the securitization was effectuated through the issuance of $1.3 billion of deferred fuel bonds as discussed in Note 18.

Virginia Power Equity Application

In July 2023, Virginia Power requested approval from the Virginia Commission to issue and sell to Dominion Energy up to $3.25 billion of authorized but unissued shares of its common stock, no par value, through the end of 2023 in order to maintain a common equity capitalization to total capitalization ratio of 52.10% through December 2024 in accordance with legislation enacted in Virginia in April 2023 as discussed above. In August 2023, the Virginia Commission approved the application.

GTSA Filing

In March 2023, Virginia Power filed a petition with the Virginia Commission for approval of Phase III, covering 2024 through 2026, of its plan for electric distribution grid transformation projects as authorized by the GTSA. The plan includes 14 projects covering six components (i) AMI; (ii) customer information platform; (iii) grid improvement projects; (iv) physical and cyber security; (v) telecommunications infrastructure and (vi) customer education. For Phase III, the total proposed capital investment is $1.1 billion and the proposed operations and maintenance investment is $71 million. In September 2023, the Virginia Commission approved total proposed capital investment of $773 million and the requested operations and maintenance investment of $71 million. In addition, the Virginia Commission approved a pilot project to include up to five battery energy storage systems, to be installed over five years, at a proposed 2024 through 2028 capital cost of $50 million.

Renewable Generation Projects

In October 2022, Virginia Power filed a petition with the Virginia Commission for CPCNs to construct and operate eight utility-scale projects totaling approximately 474 MW of solar generation and 16 MW of energy storage as part of its efforts to meet the renewable generation development requirements under the VCEA. The projects, as of October 2022, are expected to cost approximately $1.2 billion in the aggregate, excluding financing costs, and be placed into service between 2024 through 2025. In April 2023, the Virginia Commission approved the petition.

In October 2023, Virginia Power filed a petition with the Virginia Commission for CPCNs to construct or acquire and operate four utility-scale projects totaling approximately 329 MW of solar generation as part of its efforts to meet the renewable generation development targets under the VCEA. The projects, as of October 2023, are expected to cost approximately $850 million in the aggregate, excluding financing costs, and be placed into service between 2024 and 2026. This matter is pending.

Riders

Significant riders associated with various Virginia Power projects are as follows:

Rider Name	Application Date	Approval Date	Rate Year Beginning	Total Revenue Requirement (millions)(1)			Increase (Decrease) Over Previous Year (millions)
Rider BW	October 2021	May 2022	September 2023	$	120		$	(25	)
Rider CCR	February 2023	October 2023	December 2023		194			(37	)
Rider CE(2)	October 2022	April 2023	May 2023		89			18
Rider CE(3)	October 2023	Pending	May 2024		137			48
Rider E	January 2023	September 2023	November 2023		109			8
Rider E	January 2024	Pending	November 2024		72			(37	)
Rider GT	August 2023	Pending	June 2024		145			131
Rider GV(4)	June 2023	February 2024	April 2024		132			5
Rider GV(4)	June 2023	February 2024	April 2025		135			3
Rider OSW	November 2022	July 2023	September 2023		271			192
Rider OSW	November 2023	Pending	September 2024		486			215
Rider R	June 2021	March 2022	April 2023		55	(14)		(4	)
Rider RGGI(5)	December 2022	July 2023	September 2023		356		N/A
Rider RPS	December 2022	July 2023	September 2023		96			(44	)
Rider RPS	December 2023(13)	Pending	September 2024		358			262
Rider S	June 2021	February 2022	April 2023		191	(14)		(1	)
Rider SNA(6)	October 2022	June 2023	September 2023		50			(57	)
Rider SNA	October 2023	Pending	September 2024		95			45
Rider T1(7)	May 2023	July 2023	September 2023		879			173
Rider U(8)	June 2022	February 2023	April 2023		74			(21	)
Rider U(9)	October 2023	Pending	August 2024		150			76
Rider W(10)	June 2022	February 2023	April 2023		105	(14)		(16	)
DSM Riders(11)	December 2022	August 2023	September 2023		107			16
DSM Riders(12)	December 2023	Pending	September 2024		93			(14	)

(1)In addition, Virginia Power has various riders associated with other projects with an aggregate total annual revenue requirement of approximately $90 million as of December 31, 2023. There are various pending applications associated with such riders, which if approved, would result in a net increase of approximately $6 million.

(2)Associated with solar generation and energy storage projects requested for approval in October 2022 and certain small-scale solar projects in addition to previously approved Rider CE projects.

(3)Associated with five solar generation projects, one small-scale solar project and 13 power purchase agreements in addition to previously approved Rider CE projects.

(4)The total revenue requirement requested is based on an estimated retirement of Greensville County in 2058, consistent with the current estimated useful life of the facility. Virginia Power also provided an alternative approach based on an estimated retirement of Greensville County in 2045, which if this alternative had been utilized, would have resulted in a revenue requirement of $144 million and $148 million for rate years beginning April 2024 and April 2025, respectively.

(5)In December 2022, Virginia Power filed a petition to update and reinstate Rider RGGI to recover RGGI compliance costs incurred after July 2022 and those projected to occur through December 2023, with rate recovery from September 2023 through August 2024. For purposes of this proceeding, Virginia Power assumed that Virginia would withdraw from RGGI on December 31, 2023, and accordingly did not project any RGGI compliance costs to be incurred after that date.

(6)Virginia Power requested approval of cost recovery of approximately $1.2 billion through Rider SNA for the first phase of nuclear life extension program which includes investments through 2024. In July 2022, the Virginia Commission approved a stipulation proposed by Virginia Power, the Virginia Commission staff and certain interested parties recommending that costs incurred after February 2022 associated with the first phase of the nuclear life extension program for North Anna be deferred and requested for recovery in a subsequent Rider SNA filing.

(7)Consists of $510 million for the transmission component of Virginia Power’s base rates and $369 million for Rider T1.

(8)Consists of previously approved phases of Rider U. In August 2023, the Virginia Commission approved Virginia Power’s request to extend the rider for the rate year beginning April 2023 through June 2024.

(9)Consists of $72 million for previously approved phases and $78 million for phase seven costs for Rider U. In connection with the October 2023 application, Virginia Power requests the Virginia Commission further extend existing rates for Rider U through July 2024.

(10)In February 2023, the Virginia Commission also approved Virginia Power’s requested revenue requirement for the rate year beginning April 2024. However, as Virginia Power provided notification in May 2023 to combine Rider W into base rates as discussed above, Rider W ceased to be separately collected effective July 2023.

(11)Associated with an additional four new energy efficiency programs, one new demand response program and four new program bundles with a $150 million cost cap, with the ability to exceed the cost cap by no more than 15%.

(12)Associated with an additional three new energy efficiency programs and one new demand response program with a $102 million cost cap, with the ability to exceed the cost cap by no more than 15%.

(13)Virginia Power amended its application in February 2024.

(14)In May 2023, Virginia Power filed a notification with the Virginia Commission to combine Riders R, S and W, which have an aggregate revenue requirement of $351 million, into base rates effective July 2023 in accordance with legislation enacted in Virginia in April 2023.

Electric Transmission Projects

Significant Virginia Power electric transmission projects approved or applied for are as follows:

Description and Location of Project	Application Date	Approval Date	Type of Line	Miles of Lines	Cost Estimate (millions)(1)
Construct new switching station, substations,   transmission lines and related projects in Lunenberg   and Mecklenburg Counties, Virginia	October 2022	June 2023	230 kV	18		230
Construct new switching station, substation,   transmission lines and related projects in Charlotte,   Halifax and Mecklenburg Counties, Virginia	October 2022	May 2023	230 kV	26		215
Construct new Mars and Wishing Star substations,   transmission lines and related projects in Loudoun   County, Virginia	October 2022	April 2023	500/230 kV	4		720
Construct new Cirrus and Keyser switching stations,   transmission lines and related projects in Culpeper,   Virginia	November 2022	October 2023	230 kV	5		65
Rebuild of Lines #2019 and #2007 in the City of   Virginia Beach, Virginia	February 2023	August 2023	230 kV	5		95
Construct new transmission lines and convert Jeffress   switching station in Mecklenburg County, Virginia	May 2023	January 2024	230 kV	18		135
Construct new Germanna substation, transmission   line and related projects in Culpeper County,   Virginia	November 2023	Pending	230 kV	2		55
Construct Daves Store transmission line extension   in Prince William County, Virginia	February 2024	Pending	230 kV	3		70

(1)Represents the cost estimate included in the application except as updated in the approval if applicable. In addition, Virginia Power had various other transmission projects approved during 2023 and early 2024 or applied for and currently pending approval with aggregate cost estimates of approximately $155 million and $145 million, respectively.

In November 2013, the Virginia Commission issued an order granting Virginia Power a CPCN to construct approximately 7 miles of new overhead 500 kV transmission line from the existing Surry switching station in Surry County to a new Skiffes Creek switching station in James City County, and approximately 20 miles of new 230 kV transmission line in James City County, York County, and the City of Newport News from the proposed new Skiffes Creek switching station to Virginia Power’s existing Whealton substation in the City of Hampton. In February 2019, the transmission line project was placed into service. In March 2019, the U.S. Court of Appeals for the D.C. Circuit issued an order vacating the permit from the U.S. Army Corps of Engineers issued in July 2017 and ordered the U.S. Army Corps of Engineers to do a full environmental impact study of the project. In April 2019, Virginia Power and the U.S. Army Corps of Engineers filed petitions for rehearing with the U.S. Court of Appeals for the D.C. Circuit, asking that the permit from the U.S. Army Corps of Engineers remain in effect while an environmental impact study is performed. In May 2019, the U.S. Court of Appeals for the D.C. Circuit denied the request for rehearing and ordered the U.S. District Court for the D.C. Circuit to consider and issue a ruling on whether the permit should be vacated during the U.S. Army Corps of Engineers’ preparation of an environmental impact statement. In November 2019, the U.S. District Court for the D.C. Circuit issued an order allowing the permit to remain in effect while an environmental impact statement is prepared. In November 2020, the U.S. Army Corps of Engineers issued a draft environmental impact statement noting there is no better alternative. This matter is pending.

Virginia Regulation – Key Developments Affecting 2022 or 2021

2021 Triennial Review

In 2020, Virginia Power recorded a net charge of $130 million related to the use of a CCRO in accordance with the GTSA, included in impairment of assets and other charges (benefits) in its Consolidated Statements of Income (reflected in the Corporate and Other segment) for benefits expected to be provided to jurisdictional customers as a result of the 2021 Triennial Review as well as the impact on certain non-jurisdictional customers which follow Virginia Power’s jurisdictional customer rate methodology. In 2021, Virginia Power recorded a benefit of $130 million ($97 million after-tax) in impairment of assets and other charges (benefits) in its Consolidated Statements of Income (reflected in the Corporate and Other segment) to adjust its reserve related to the use of a CCRO in accordance with the GTSA.

Subsequently, in October 2021, Virginia Power, the Virginia Commission staff and other parties filed a comprehensive settlement agreement with the Virginia Commission for approval. The comprehensive settlement agreement provides for $330 million in one-time refunds to customers made up of $255 million over a 6-month period and $75 million over three years, a $50 million going-forward base rate reduction and an authorized ROE of 9.35%. Additionally, Virginia Power has agreed to utilize $309 million of qualifying CCRO investments in the CVOW Pilot Project, deployment of AMI and a Customer Information Platform to offset

available earnings and to amortize through 2023 the early retirement charges for coal- and oil-fired generation units recorded in 2019 and 2020. In November 2021, the Virginia Commission approved the comprehensive settlement agreement.

In connection with the settlement agreement, Virginia Power recorded a $356 million ($265 million after-tax) charge for refunds to be provided to customers in operating revenues in its Consolidated Statements of Income as well as a $549 million ($409 million after-tax) benefit primarily from the establishment of a regulatory asset associated with the early retirements of certain coal- and oil-fired generating units and a $318 million ($237 million after-tax) charge for CCRO benefits provided to customers in impairment of assets and other charges (benefits) in its Consolidated Statements of Income (reflected in the Corporate and Other segment). The amounts recorded reflect the impact related to jurisdictional customers as a result of the 2021 Triennial Review as well as the impact on certain non-jurisdictional customers which follow Virginia Power’s jurisdictional customer rate methodology.

Utility Disconnection Moratorium

In November 2020, legislation was enacted in Virginia relating to the moratorium on utility disconnections during the COVID-19 pandemic and resulted in Virginia Power forgiving Virginia jurisdictional retail electric customer balances that were more than 30 days past due as of September 30, 2020. In connection with the Virginia 2021 budget process, in the first quarter of 2021 Virginia Power recorded a charge of $76 million ($56 million after-tax) in impairment of assets and other charges (benefits) in its Consolidated Statements of Income (reflected in the Corporate and Other segment) for Virginia jurisdictional retail electric customer balances that were more than 30 days past due as of December 31, 2020 that Virginia Power is required to forgive.

Virginia Fuel Expenses

In May 2022, Virginia Power filed its annual fuel factor filing with the Virginia Commission to recover an estimated $2.3 billion in Virginia jurisdictional projected fuel expense for the rate year beginning July 1, 2022 and a projected $1.0 billion under-recovered balance as of June 30, 2022. Virginia Power’s proposed fuel rate represents a fuel revenue increase of $1.8 billion when applied to projected kilowatt-hour sales for that period. Virginia Power also proposed alternatives to recover this under-collected balance over a two- or three-year period. Under these alternatives, Virginia Power’s fuel revenues for the rate year would increase by $1.3 billion or $1.2 billion, respectively. In addition, Virginia Power proposed a change in the timing of fuel cost recovery for certain customers who elect market-based rates that would consider those customers’ portion of the projected under-recovered balance to have been recovered as of June 30, 2022. In July 2022, Virginia Power, the Virginia Commission staff and another party filed a comprehensive settlement agreement with the Virginia Commission for approval. The comprehensive settlement agreement provides for the collection of the requested under-recovered projected fuel expense over a three-year period beginning July 1, 2022 and that Virginia Power will exclude from recovery through base rates one half of the related financing costs over the three-year period. In addition, the proposed settlement agreement affirmed Virginia Power’s proposal regarding fuel cost recovery for market-based rate customers. As a result, Virginia Power recorded a $191 million ($142 million after-tax) charge in the second quarter of 2022 within impairment of assets and other charges in its Consolidated Statement of Income (reflected in the Corporate and Other segment). In September 2022, the Virginia Commission approved the comprehensive settlement agreement.

Rider RGGI

In May 2022, Virginia Power filed a petition with the Virginia Commission requesting suspension of Rider RGGI approved in August 2021. Virginia Power also requested that RGGI compliance costs incurred and unrecovered through July 2022 be recovered through existing base rates in effect during the period incurred. The Virginia Commission approved the request in June 2022. In the second quarter of 2022, Virginia Power recorded a charge of $180 million ($134 million after-tax) in impairment of assets and other charges (reflected in the Corporate and Other segment) for the amount deemed recovered through base rates through June 30, 2022, including the impact of certain non-jurisdictional customers which follow Virginia Power’s jurisdictional rate methodology. Virginia Power recorded $33 million ($25 million after-tax) in depreciation and amortization in the third quarter of 2022.

North Carolina Regulation

PSNC Rider D

Rider D allows PSNC to recover from customers all prudently incurred gas costs and the related portion of uncollectible expenses as well as losses on negotiated gas and transportation sales. In February 2023, PSNC submitted a filing with the North Carolina Commission for a $56 million gas cost decrease with rates effective March 2023. The North Carolina Commission approved the filing in March 2023.

In January 2024, PSNC submitted a filing with the North Carolina Commission for a $42 million gas cost decrease with rates effective February 2024. The North Carolina Commission approved the filing in January 2024.

PSNC Customer Usage Tracker

PSNC utilizes a customer usage tracker, a decoupling mechanism, which allows it to adjust its base rates semi-annually for residential and commercial customers based on average per customer consumption. In March 2023, PSNC submitted a filing with the North Carolina Commission for a $23 million decrease relating to the customer usage tracker. The North Carolina Commission approved the

filing in March 2023 with rates effective April 2023. In September 2023, PSNC submitted a filing with the North Carolina Commission for a $34 million increase relating to the customer usage tracker. The North Carolina Commission approved the filing in September 2023 with rates effective October 2023.

South Carolina Regulation

Electric Base Rate Case

In August 2020, DESC filed its retail electric base rate case and schedules with the South Carolina Commission. In July 2021, DESC, the South Carolina Office of Regulatory Staff and other parties of record filed a comprehensive settlement agreement with the South Carolina Commission for approval. The comprehensive settlement agreement provided for a non-fuel, base rate increase of $62 million (resulting in a net increase of $36 million after considering an accelerated amortization of certain excess deferred income taxes) commencing with bills issued on September 1, 2021 and an authorized earned ROE of 9.50%. Additionally, DESC agreed to commit up to $15 million to forgive retail electric customer balances that were more than 60 days past due as of May 31, 2021 and provide $15 million for energy efficiency upgrades and critical health and safety repairs to customer homes. Pursuant to the comprehensive settlement agreement, DESC would not file a retail electric base rate case prior to July 1, 2023, such that new rates would not be effective prior to January 1, 2024, absent unforeseen extraordinary economic or financial conditions that may include changes in corporate tax rates. In July 2021, the South Carolina Commission approved the comprehensive settlement agreement and issued its final order in August 2021.

In connection with this matter, Dominion Energy recorded charges of $249 million ($187 million after-tax) reflected within impairment of assets and other charges (reflected in the Corporate and Other segment), including $237 million of regulatory assets associated with DESC’s purchases of its first mortgage bonds during 2019 that are no longer probable of recovery under the settlement agreement, and $18 million ($14 million after-tax) reflected within other income (expense) in its Consolidated Statements of Income for the year ended December 31, 2021.

Electric DSM Programs

DESC has approval for a DSM rider through which it recovers expenditures related to its electric DSM programs.

In January 2023, DESC filed an application with the South Carolina Commission seeking approval to recover $46 million of costs and net lost revenues associated with these programs, along with an incentive to invest in such programs. DESC requested that rates be effective with the first billing cycle of May 2023. In April 2023, the South Carolina Commission approved the request, effective with the first billing cycle of May 2023.

In January 2024, DESC filed an application with the South Carolina Commission seeking approval to recover $47 million of costs and net lost revenues associated with these programs, along with an incentive to invest in such programs. DESC requested that rates be effective with the first billing cycle of May 2024. This matter is pending.

Natural Gas Rates

In March 2023, DESC filed its natural gas base rate case and schedules with the South Carolina Commission. DESC proposed a rate increase of $19 million effective October 2023. The base rate increase was proposed to recover significant investment in distribution infrastructure for the benefit of customers. The proposed rates would provide for an ROE of 10.38% compared to the currently authorized ROE of 10.25%. In addition, DESC elected to continue applicability of the Natural Gas Rate Stabilization Act, which allows for the adjustment of natural gas base rates annually, to its future rates and charges. In September 2023, DESC, the South Carolina Office of Regulatory Staff and other parties of record filed a stipulation agreement with the South Carolina Commission for approval. The stipulation agreement provides for a rate increase of $9 million commencing with bills rendered in October 2023, and an authorized ROE of 9.49%. Pursuant to the stipulation agreement, DESC would not file a natural gas base rate case prior to April 1, 2026, such that new rates would not be effective prior to October 1, 2026, absent unforeseen extraordinary economic or financial conditions that may include changes in corporate tax rates. In September 2023, the South Carolina Commission approved the stipulation agreement and issued its final order in October 2023.

Cost of Fuel

DESC’s retail electric rates include a cost of fuel component approved by the South Carolina Commission which may be adjusted periodically to reflect changes in the price of fuel purchased by DESC.

In February 2023, DESC filed with the South Carolina Commission a proposal to increase the total fuel cost component of retail electric rates. DESC’s proposed adjustment is designed to recover DESC’s current base fuel costs, including its existing under-collected balance, over the 12-month period beginning with the first billing cycle of May 2023. In addition, DESC proposed a decrease to its variable environmental and avoided capacity cost component. The net effect is a proposed annual increase of $176 million. In March 2023, DESC, the South Carolina Office of Regulatory Staff and another party of record filed a stipulation with the South Carolina Commission for approval to reduce the base fuel cost component reflecting a subsequent decrease in current fuel prices, resulting in a net annual increase of $121 million. In April 2023, the South Carolina Commission voted to approve the stipulation, with rates effective May 2023.

In February 2024, DESC filed with the South Carolina Commission a proposal to decrease the total fuel cost component of retail electric rates. DESC’s proposed adjustment is designed to recover DESC’s current base fuel costs, including its existing under-collected balance, over the 12-month period beginning with the first billing cycle of May 2024. In addition, DESC proposed an increase to its variable environmental and avoided capacity cost component. The net effect is a proposed annual decrease of $315 million. This matter is pending.

Electric Transmission Project

In March 2023, DESC filed an application with the South Carolina Commission requesting approval to construct and operate 19 miles of 230 kV transmission lines, a substation and associated facilities in Jasper County, South Carolina estimated to cost approximately $55 million. In July 2023, the South Carolina Commission voted to approve the request and issued its order in September 2023.

Electric - Other

DESC utilizes a pension costs rider approved by the South Carolina Commission which is designed to allow recovery of projected pension costs, including under-collected balances or net of over-collected balances, as applicable. The rider is typically reviewed for adjustment every 12 months with any resulting increase or decrease going into effect beginning with the first billing cycle in May. In April 2023, the South Carolina Commission approved DESC’s requested adjustment to this rider to increase annual revenue by $24 million.

Ohio Regulation

Base Rate Case

In October 2023, East Ohio filed its base rate case and schedules with the Ohio Commission. East Ohio proposed a non-fuel, base rate increase of $212 million, projected to be effective January 2025. The base rate increase was proposed to recover the significant investment in distribution infrastructure for the benefit of Ohio customers. The proposed rates would provide for an ROE of 10.40% compared to the currently authorized ROE of 10.38%. In addition, East Ohio requested approval for an alternative rate plan for the continuation and modification of certain programs, including PIR and CEP. This matter is pending.

PIR Program

In 2008, East Ohio began PIR, aimed at replacing approximately 25% of its pipeline system. The Ohio Commission has approved East Ohio’s PIR program for capital investments through 2026 with 3% increases of annual capital expenditures per year.

In April 2023, the Ohio Commission approved East Ohio’s application to adjust the PIR cost recovery rates for 2022 costs. The filing reflects gross plant investment for 2022 of $225 million, cumulative gross plant investment of $2.4 billion and a revenue requirement of $305 million.

CEP Program

In 2011, East Ohio began CEP which enables East Ohio to defer depreciation expense, property tax expense and carrying costs at the debt rate of 6.5% on capital investments not covered by its PIR program to expand, upgrade or replace its infrastructure and information technology systems as well as investments necessary to comply with the Ohio Commission or other government regulation. In April 2022, certain parties filed an appeal with the Supreme Court of Ohio appealing the Ohio Commission’s December 2020 order establishing the CEP rider, including the rate of return utilized in determining the revenue requirement. In September 2023, the Supreme Court of Ohio affirmed the Ohio Commission’s December 2020 order.

In September 2023, the Ohio Commission approved adjustments to CEP cost recovery rates for 2022 costs. The approved rates reflect gross plant investment for 2022 of $195 million, cumulative gross plant investment of $1.3 billion and a revenue requirement of $151 million.

UEX Rider

East Ohio has approval for a UEX Rider through which it recovers the bad debt expense of most customers not participating in the PIPP Plus Program. The UEX Rider is adjusted annually to achieve dollar for dollar recovery of East Ohio’s actual write-offs of uncollectible amounts. In July 2023, the Ohio Commission approved East Ohio’s application to adjust its UEX Rider to reflect an annual revenue requirement of $23 million to provide for recovery of an under-recovered accumulated bad debt expense of $9 million as of March 31, 2023, and recovery of net bad debt expense projected to total $14 million for the twelve-month period ending March 2024.

Utah Regulation

Purchased Gas

In February 2023, Questar Gas filed an application with the Utah Commission seeking approval for a $92 million gas cost increase with rates effective March 2023. Subsequently in February 2023, the Utah Commission approved a $164 million gas cost increase reflecting additional undercollected gas costs incurred in January 2023.

Conservation Enabling Tariff

Questar Gas has a revenue decoupling mechanism called the conservation enabling tariff, which allows it to collect its allowed revenue per customer and promote energy conservation. Under the conservation enabling tariff, Questar Gas’ non-gas revenues are decoupled from the temperature-adjusted usage per customer. The tariff specifies an allowed monthly revenue per customer, with differences to be deferred and recovered from or refunded to customers through periodic rate adjustments. These adjustments are limited to 5% of distribution non-gas revenues. In December 2023, the Utah Commission approved Questar Gas’ request for a non-gas cost decrease of $27 million relating to the conservation enabling tariff with rates effective January 2024.