FIRSTENERGY SENECA
OperatingHydro power plant
- Capacity
- 469 MW
- Primary fuel
- Hydro
- County
- Warren County
- Operator
- FIRSTENERGY GENERATION CORP
- Status
- Operating
- Commissioned
- 1970
- EIA plant ID
- 8225
- Generators
- 3
- Technology
- Hydroelectric Pumped Storage
- Net generation (2024)
- -374 GWh
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 41.8389, -79.0056
FIRSTENERGY SENECA, a 469 MW Hydro power plant in Warren County, Pennsylvania. Operated by FIRSTENERGY GENERATION CORP, commissioned 1970.
How FIRSTENERGY SENECA compares
With 469 MW of capacity, FIRSTENERGY SENECA ranks 28th among the 170 operating power plants Bywatts maps in Pennsylvania and 2nd of the 18 operating Hydro plants in the state. It accounts for about 20% of Pennsylvania's operating Hydro capacity and 1.2% of all operating capacity in the state. Nationally it is the 48th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1970, it is older than 84% of the 168 operating Pennsylvania plants with a recorded commissioning year. It shares Warren County with one other operating plant, WARREN.
EIA-860 lists 3 generators at the site with 438 MW of nameplate capacity, mainly hydroelectric pumped storage technology. The plant was a net consumer of electricity in 2024 (-374 GWh), which is typical of pumped storage.
Grid neighborhood
The closest transmission line found within 10 miles is a 230 kV line owned by PENNSYLVANIA ELECTRIC CO, under 0.1 miles away. Another 2 operating power plants totaling 149 MW sit within 25 miles; the largest is S A CARLSON (96 MW, Coal).
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
FIRSTENERGY SENECA is a 469 MW hydro power plant in Warren County, PA, operated by FIRSTENERGY GENERATION CORP, commissioned in 1970. Warren County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.3 of 5 at the 8th national percentile. Riverine flooding is the leading peril, rated Relatively Moderate by FEMA at the 98th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a hydro plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Warren County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Riverine flooding | Relatively Moderate | 98th | 4.9 of 5 | 1.0 |
| Winter weather | Relatively Low | 61st | 3.4 of 5 | 26.5 |
| Hurricane | Very Low | 56th | 3.2 of 5 | 0.03 |
| Strong wind | Relatively Moderate | 36th | 2.4 of 5 | 1.8 |
| Tornado | Very Low | 20th | 1.8 of 5 | 0.23 |
| Ice storm | Very Low | 14th | 1.6 of 5 | 0.70 |
| Earthquake | Very Low | 13th | 1.5 of 5 | <0.01 |
| Hail | Very Low | 12th | 1.5 of 5 | 1.5 |
| Lightning | Relatively Moderate | 11th | 1.5 of 5 | 35.9 |
| Wildfire | Very Low | 10th | 1.4 of 5 | <0.01 |
| Heat wave | Very Low | 2nd | 1.1 of 5 | 0.42 |
Perils not assessed in Warren County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Warren County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.