Power plants in Jefferson County, New York
33 operating power plants in Jefferson County, New York, with 256 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Plants
33
Nameplate capacity
256 MW
Net generation, 2025
404 GWh
31 of 33 plants reported
Largest power plants in Jefferson County
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Carthage Energy LLCNatural gas | 63 | 6.7 | 1.2% |
| 2 | Glen Park Hydroelectric ProjectHydro | 33 | 72.4 | 25.3% |
| 3 | DeferietHydro | 12 | 40.2 | 38.2% |
| 4 | Blanchard Road 1 Community SolarSolar and battery storage | 10 | 7.1 | 16.3% |
| 5 | Blanchard Road 2 Community SolarSolar and battery storage | 10 | 7.6 | 17.3% |
| 6 | NYS Rte 12 Community SolarSolar and battery storage | 10 | 6.9 | 15.6% |
| 7 | Great Lakes Seaway Community SolarSolar and battery storage | 10 | 5.2 | 11.9% |
| 8 | Beebee Island Hydro PlantHydro | 9.0 | 40.1 | 50.8% |
| 9 | WatertownHydro | 8.1 | 19.2 | 27.0% |
| 10 | DANC LFGTE FacilityLandfill gas | 6.4 | 25.5 | 45.4% |
| 11 | Black RiverHydro | 6.0 | 32.5 | 61.8% |
| 12 | KamargoHydro | 6.0 | 21.3 | 40.6% |
| 13 | HerringsHydro | 5.4 | 18.4 | 38.9% |
| 14 | NY 26 Carthage CSGSolar | 5.0 | 6.9 | 15.8% |
| 15 | OYA Robinson RoadSolar | 5.0 | 10.2 | 23.4% |
| 16 | OYA Wayside DriveSolar | 5.0 | 10.4 | 23.7% |
| 17 | Carthage ASolar | 5.0 | 7.6 | 17.4% |
| 18 | FFP - NY Game Farm CSGSolar | 5.0 | 0.9 | – |
| 19 | Tubolino CSGSolar | 5.0 | 4.2 | – |
| 20 | EllisburgSolar | 5.0 | 6.3 | 14.4% |
| 21 | West End Dam Hydroelectric ProjectHydro | 4.4 | – | – |
| 22 | Dexter PlantHydro | 4.2 | 6.9 | 18.9% |
| 23 | PhiladlephiaHydro | 3.6 | 8.6 | 27.3% |
| 24 | Longfalls FacilityHydro | 3.3 | 5.4 | 18.8% |
| 25 | Carthage BSolar | 3.3 | 5.3 | 18.5% |
| 26 | SewallsHydro | 2.0 | 11.7 | 66.8% |
| 27 | Jefferson-Lewis BOCES SolarSolar | 2.0 | 2.6 | 14.6% |
| 28 | St. Lawrence University - SuttonSolar | 2.0 | 2.4 | 13.5% |
| 29 | Mereand CSGSolar | 2.0 | 3.3 | 18.6% |
| 30 | Tannery Island PowerHydro | 1.5 | – | – |
| 31 | Theresa PlantHydro | 1.3 | 3.9 | 34.0% |
| 32 | ASA Clayton NY Solar I LLCSolar | 1.3 | 2.6 | 22.7% |
| 33 | Diamond Island PlantHydro | 1.2 | 1.8 | 17.4% |
MW is the nameplate capacity of operating generators and batteries. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources
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