In Armstrong County, Pennsylvania (PA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

2 GW of nameplate capacity across 6 units, as of the EIA-860M release for 2026-07.

EIA-860M names KeyCon Operating LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as Keystone LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — KeyCon Operating LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Keystone LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Keystone still running?

EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Keystone

Keystone is a 2 GW coal power plant in Armstrong County, Pennsylvania, operated by KeyCon Operating LLC. EIA-860M lists 6 generating units here, inside PJM. Its units entered service between 1967 and 1968.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 1,883.2 MW; 1,711.2 MW net summer
Generating units: 6
In service: 1967–1968
EIA plant ID: 3136

Where it is

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County: Armstrong County, Pennsylvania
Coordinates: 40.6604, -79.3411
Balancing authority: PJM
Sector: IPP Non-CHP

Units, technology and status

Operator of record: KeyCon Operating LLC
Primary energy source: Coal
Technologies: Conventional Steam Coal, Petroleum Liquids
Status: Standby/Backup (4) · Operating (2)

This site runs on more than one energy source. EIA-860M capacity splits: Coal 2 GW, Petroleum 11 MW. It is filed here under Coal, the source with the most capacity.

Every plant KeyCon Operating LLC reports to EIA →

Keystone: FAQ

Where is Keystone?: In Armstrong County, Pennsylvania (PA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Keystone?: 2 GW of nameplate capacity across 6 units, as of the EIA-860M release for 2026-07.
Who owns Keystone?: EIA-860M names KeyCon Operating LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Keystone LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — KeyCon Operating LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Keystone LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Keystone still running?: EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.