Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2023

Public Utilities General Disclosures [Line Items]

Summary of Significant Virginia Power Electric Transmission Projects Applied

Developments for 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)
Partial rebuild of Bristers-Ox 115 kV line in   Fauquier and Prince William Counties, Virginia	August 2022	April 2023	230 kV	15	$	40
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 Altair switching station, transmission   lines and related projects in Loudoun County,   Virginia	November 2022	June 2023	230 kV	2		50
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
Install transformer at Possum Point substation,   rebuild and construct transmission lines and   related projects in Prince William County, Virginia	March 2023	Pending	230 kV	2		35
Partial rebuild of Line #2011 in the Cities of   Manassas and Manassas Park, Virginia and   Prince William and Fairfax Counties, Virginia	March 2023	October 2023	230 kV	7		35
Construct new transmission lines and convert Jeffress   switching station in Mecklenburg County, Virginia	May 2023	Pending	230 kV	18		135
Construct new transmission lines and expand White   Oak substation in Henrico County, Virginia	June 2023	Pending	230 kV	5		45
Rebuild Line #235 in Halifax, Mecklenburg and   Charlotte Counties, Virginia	August 2023	Pending	230 kV	16		35
Partial rebuild Line #249 in Dinwiddie County and   the City of Petersburg, Virginia	September 2023	Pending	230 kV	7		25

Virginia Electric and Power Company

Public Utilities General Disclosures [Line Items]

Significant Riders Associated With Virginia Power Projects

Developments for significant riders associated with various Virginia Power projects are as follows:

Rider Name	Application Date	Approval Date	Rate Year Beginning	Total Revenue Requirement (millions)				Increase (Decrease) Over Previous Year (millions)
Rider CCR	February 2023	October 2023	December 2023	$	194			$	(37	)
Rider CE(1)	October 2022	April 2023	May 2023		89				18
Rider CE(2)	October 2023	Pending	May 2024		137				48
Rider E	January 2023	September 2023	November 2023		109				8
Rider GT	August 2022	April 2023	June 2023		14				(42	)
Rider GT	August 2023	Pending	June 2024		145				131
Rider GV(3)	June 2023	Pending	April 2024		132				5
Rider GV(3)	June 2023	Pending	April 2025		135				3
Rider OSW	November 2022	July 2023	September 2023		271				192
Rider OSW	November 2023	Pending	September 2024		486				215
Rider PPA(4)	December 2022	July 2023	September 2023		(22	)			(17	)
Rider R	June 2021	March 2022	April 2023		55		(12)		(4	)
Rider RBB	October 2023	Pending	May 2024		18				11
Rider RGGI(5)	December 2022	July 2023	September 2023		356			N/A
Rider RPS	December 2022	July 2023	September 2023		96				(44	)
Rider S	June 2021	February 2022	April 2023		191		(12)		(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 US-3	August 2022	April 2023	June 2023		40				(10	)
Rider US-3	August 2023	Pending	June 2024		37				(3	)
Rider US-4	August 2022	April 2023	June 2023		16				1
Rider US-4	August 2023	Pending	June 2024		14				(2	)
Rider W(10)	June 2022	February 2023	April 2023		105		(12)		(16	)
DSM Riders(11)	December 2022	August 2023	September 2023		107				16

(1)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.

(2)Associated with five solar generation projects, one small-scale solar project and 13 power purchase agreements in addition to previously approved Rider CE projects. In addition, Virginia Power seeks Virginia Commission approval to consolidate Rider PPA with Rider CE and to end Rider PPA in April 2024.

(3)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 utilized would result in a revenue requirement of $144 million and $148 million for rate years beginning April 2024 and April 2025, respectively.

(4)In connection with the October 2023 Rider CE application, Virginia Power seeks Virginia Commission approval to consolidate Rider PPA with Rider CE and to end Rider PPA in April 2024. This matter is pending.

(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 has assumed that Virginia will 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 April 2022, Virginia Power, the Virginia Commission staff and certain interested parties filed a proposed stipulation 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)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.