Natural gas power plants in Washington
14 operating natural gas power plants in Washington with 3,657 MW of natural gas capacity, largest first. From EIA-860M, August 2026.
Plants
14
Natural gas capacity
3,657 MW
Net generation, 2025
15.9 TWh
Largest natural gas power plants in Washington
| # | Plant | Natural gas MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Grays Harbor Energy FacilityGrays Harbor County | 715 | 3,649 | 58.3% |
| 2 | Chehalis Generating FacilityLewis County | 593 | 2,337 | 45.0% |
| 3 | Mint Farm Generating StationCowlitz County | 319 | 2,220 | 79.4% |
| 4 | Frederickson Power LPPierce County | 318 | 1,584 | 56.8% |
| 5 | Goldendale Generating StationKlickitat County | 303 | 1,604 | 60.5% |
| 6 | Ferndale Generating StationWhatcom County | 286 | 1,324 | 52.9% |
| 7 | River Road Gen PlantClark County | 248 | 1,317* | 66.3% |
| 8 | FredericksonPierce County | 178 | 20.8 | 1.3% |
| 9 | EncogenWhatcom County | 176 | 354 | 22.9% |
| 10 | WhitehornWhatcom County | 169 | 65.2 | 4.4% |
| 11 | HF Sinclair Puget Sound RefiningSkagit County | 140 | 942 | 76.9% |
| 12 | Sumas Power PlantWhatcom County | 126 | 398 | 36.2% |
| 13 | Northeast (WA)Spokane County | 62 | 0.5 | 0.1% |
| 14 | Boulder ParkSpokane County | 25 | 126 | 58.4% |
* Fewer than 12 months of 2025 reported, so the total is partial.
Projects where natural gas is the largest fuel or at least a fifth of nameplate capacity. MW is natural gas nameplate only; net generation covers the whole project. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources