Power plants in King County, Washington
11 operating power plants in King County, Washington, with 152 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Largest power plants in King County
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Snoqualmie 2Hydro | 39 | 107 | 31.5% |
| 2 | Cedar Falls (WA)Hydro | 30 | 53.6 | 20.4% |
| 3 | Twin Falls HydroHydro | 24 | 59.3 | 28.2% |
| 4 | South Fork ToltHydro | 17 | 48.6 | 33.0% |
| 5 | SnoqualmieHydro | 13 | 59.2 | 52.8% |
| 6 | Calligan Creek Hydroelectric ProjectHydro | 6.0 | 12.6 | 24.1% |
| 7 | Hancock Creek Hydroelectric ProjectHydro | 6.0 | 18.3 | 34.7% |
| 8 | Cedar HillsLandfill gas | 5.4 | 0.1 | – |
| 9 | West Point Treatment PlantBiomass | 4.6 | 14.3 | 35.6% |
| 10 | Weeks FallsHydro | 4.3 | 10.7 | 28.3% |
| 11 | Black CreekHydro | 3.7 | 8.7 | 26.9% |
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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