Power plants in Columbia County, Washington
4 operating power plants in Columbia County, Washington, with 1,197 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Largest power plants in Columbia County
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Little GooseHydro | 540 | 1,589 | 22.4% |
| 2 | Tucannon River Wind FarmWind | 267 | 737 | 31.5% |
| 3 | Marengo Wind PlantWind | 234 | 613 | 29.9% |
| 4 | Hopkins Ridge WindWind | 157 | 345 | 25.2% |
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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