Power plants in Washington County, Oregon
5 operating power plants in Washington County, Oregon, with 99 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Largest power plants in Washington County
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Constable BESSBattery storage | 75 | −10.8 | – |
| 2 | Coffee Creek BESSBattery storage | 17 | −1.0 | – |
| 3 | MilfordSolar ORSolar | 3.0 | 4.2 | 16.0% |
| 4 | O'Neill Creek SolarSolar | 2.2 | 3.4 | 17.6% |
| 5 | Durham AWTFBiomass | 1.6 | 7.5 | 53.7% |
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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