How big is Potomac Energy Center?

Potomac Energy Center reports 812 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.

What kind of plant is Potomac Energy Center?

Potomac Energy Center is a Natural Gas Fired Combined Cycle facility in Loudoun County, VA, participating in the PJM market.

Where is Potomac Energy Center located?

Potomac Energy Center is in Loudoun County, VA, inside the PJM balancing area.

Who operates Potomac Energy Center?

Potomac Energy Center is operated by Potomac Energy Center LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Potomac Energy Center generate?

Potomac Energy Center reported 4,743.9 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.

How does Potomac Energy Center compare to other plants?

By capacity, Potomac Energy Center ranks #141 of 540 operating plants of the same technology nationally. It ranks #5 of 11 in VA.

Potomac Energy Center — 812 MW gas plant, Loudoun County, VA

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Potomac Energy Center — 812 MW gas plant, Loudoun County, VA · Ask the Grid

Generation and physical site

EIA plant 59004 · Inventory for Sep 2026.

Reported operating nameplate by technology

Natural gas: 812 MW

Operating generators only. Battery power is in MW; stored energy is in MWh. These ratings do not establish a shared export limit.

Generator records (3)

EIA generator status and nameplate capacity for Potomac Energy Center, LLC
Generator	Technology	Status	Power (MW)	Energy (MWh)
GEN1	Natural Gas Fired Combined Cycle	Operating	237	Unknown
GEN2	Natural Gas Fired Combined Cycle	Operating	237	Unknown
GEN3	Natural Gas Fired Combined Cycle	Operating	338	Unknown

Physical map location · OpenStreetMap: 39.05836, -77.54185
Filed location · EIA: 39.05806, -77.54500

Sources and observation dates

Inventory source: EIA-860M workbook (preliminary)
EIA reporting month: Sep 2026
EIA retrieved: Oct 24, 2026
OSM extract: Oct 9, 2026
OSM last mapped edit: May 17, 2026
Map prepared: Oct 24, 2026
Field verification: Not reported

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA source inventory

Units and generators

Current generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
GEN1	237 MW 220 MW summer	Natural Gas Fired Combined Cycle CT	Apr 2017	Operating
GEN2	237 MW 220 MW summer	Natural Gas Fired Combined Cycle CT	Apr 2017	Operating
GEN3	338 MW 326 MW summer	Natural Gas Fired Combined Cycle CA	Apr 2017	Operating

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Transactions and agreements

PPA Approval And Offtake Arrangement

Mar 9, 2026

American Municipal Power entered into the Potomac Energy Center PPA with Potomac Energy Center, LLC. AMP will purchase and the seller will supply approximately 268 MW of base capacity plus a pro-rata share of 32 MW of duct-firing capacity and associated energy for 15 years. AMP materials describe deliveries beginning June 1, 2026 and continuing through May 31, 2041.

268 MW contracted15 yearsAmerican Municipal Power, Inc. · Potomac Energy Center, LLC

Source

Municipal PPA Schedule Authorization

Mar 9, 2026

The Town of Front Royal authorized a Potomac Energy Center schedule with American Municipal Power under the AMP master-services structure. The town could acquire up to 3 MW of capacity and associated energy through the Potomac Energy Center PPA for a 15-year period.

3 MW contracted15 yearsTown of Front Royal, Virginia · American Municipal Power, Inc. · Potomac Energy Center, LLC

Source

Land and environmental record

County Appraisal And Parcel Identifier

2026

Loudoun County parcel PARID 193389504000

The county appraisal record identifies Potomac Energy Center, LLC as owner of the parcel at 20260 Energy Park Drive, Leesburg, Virginia; tax map is /61//16///A-2/.

Loudoun County

Historical Air-Permitting Milestone

Dec 18, 2020

Historical PSD/NSR construction permit registration 73826; facility ID 51-107-01019

A Virginia permit amendment dated December 18, 2020 covered construction and operation of the electric power generation facility and stated that the facility was subject to PSD, nonattainment new-source-review, and stationary-source construction and operating requirements.

Source

Parcel Acreage And Public Landowner

2026

87.01 acres

Loudoun County parcel PARID 193389504000 is owned by Potomac Energy Center, LLC, with primary address 20260 Energy Park Drive. The county record identifies the legal description as Stonewall Energy Park Parcel A-2 and the land use as vacant land.

Loudoun County

Permitted Facility Description

Apr 1, 2024

802 MW nominal net combined-cycle generating facility

The 2024 Virginia Title V permit describes the facility as a nominal 802 MW net fossil-fuel combined-cycle electrical generating facility. The permit lists two Siemens SGT6-5000F5 natural-gas combustion turbines, two HRSG duct burners, an auxiliary boiler, a fuel-gas heater, and an emergency diesel generator.

73826 Title V Permit

Permitted Fuel

Dec 18, 2020

Natural gas-only firing for the combined-cycle units, HRSG duct burners, auxiliary boiler, and fuel-gas heater

The Virginia construction permit specifies pipeline natural gas as the approved fuel for CT1, CT2, DB1, DB2, the auxiliary boiler, and the fuel-gas heater, with maximum total sulfur content of 0.1 grains per 100 standard cubic feet unless DEQ approves a change.

Source

Mapped facility footprint

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Overview

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Generation and physical site

Reported operating nameplate by technology

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Units and generators

Performance

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Monthly generation

Grid and market context

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Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Parties and identifiers

Reporting portfolio

Timeline and sources

Project timeline

Sources

Common questions about Potomac Energy Center

How big is Potomac Energy Center?

What kind of plant is Potomac Energy Center?

Where is Potomac Energy Center located?

Who operates Potomac Energy Center?

How much electricity does Potomac Energy Center generate?

How does Potomac Energy Center compare to other plants?

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