Seneca Generation LLC
Seneca Generation LLC is a 438 MW pumped storage hydro plant in Warren County, Pennsylvania, operated by Seneca Generation LLC. EIA-860M lists 3 generating units here, inside PJM. Its units entered service in 1970.
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
- 437.9 MW
- 463.4 MW net summer
- Generating units
- 3
- In service
- 1970
- EIA plant ID
- 8225
Where it is
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- County
- Warren County, Pennsylvania
- Coordinates
- 41.8389, -79.0056
- Balancing authority
- PJM
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- Seneca Generation LLC
- Primary energy source
- Pumped storage
- Technologies
- Conventional Hydroelectric, Hydroelectric Pumped Storage
- Status
- Operating
This site runs on more than one energy source. EIA-860M capacity splits: Pumped storage 412 MW, Hydro 26 MW. It is filed here under Pumped storage, the source with the most capacity.
Seneca Generation LLC: FAQ
- Where is Seneca Generation LLC?
- In Warren 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 Seneca Generation LLC?
- 438 MW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.
- Who owns Seneca Generation LLC?
- EIA-860M names Seneca Generation LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is Seneca Generation LLC still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.