Largest power plants in Washington
The 50 largest power plants in Washington by nameplate capacity, from EIA-860M for August 2026, with 2025 net generation from EIA-923.
Top 50 by nameplate capacity
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Grand CouleeGrant County · Hydro | 6,809 | 16,151 | – |
| 2 | Chief JosephDouglas County · Hydro | 1,744 | 9,806 | 45.6% |
| 3 | Rocky ReachChelan County · Hydro | 1,349 | 5,241 | – |
| 4 | WanapumGrant County · Hydro | 1,220 | 4,438 | 41.5% |
| 5 | Columbia Generating StationBenton County · Nuclear | 1,200 | 7,748 | 73.7% |
| 6 | BoundaryPend Oreille County · Hydro | 1,160 | 3,099 | 30.5% |
| 7 | Priest RapidsGrant County · Hydro | 950 | 4,165 | 50.0% |
| 8 | WellsChelan County · Hydro | 789 | 3,708 | – |
| 9 | Transalta Centralia GenerationLewis County · Coal | 730 | 3,150 | 49.3% |
| 10 | Grays Harbor Energy FacilityGrays Harbor County · Natural gas | 715 | 3,649 | 58.3% |
| 11 | Lower MonumentalWalla Walla County · Hydro | 675 | 1,477 | 20.8% |
| 12 | Lower GraniteWhitman County · Hydro | 675 | 1,461 | 20.6% |
| 13 | Chehalis Generating FacilityLewis County · Natural gas | 593 | 2,337 | 45.0% |
| 14 | Little GooseColumbia County · Hydro | 540 | 1,589 | 22.4% |
| 15 | Rock IslandChelan County · Hydro | 514 | 2,227 | 40.4% |
| 16 | RossWhatcom County · Hydro | 450 | 532 | 13.5% |
| 17 | Ice HarborWalla Walla County · Hydro | 423 | 1,511 | 28.6% |
| 18 | Lower Snake River Wind Energy ProjectGarfield County · Wind | 343 | 795 | 26.5% |
| 19 | Mint Farm Generating StationCowlitz County · Natural gas | 319 | 2,220 | 79.4% |
| 20 | Frederickson Power LPPierce County · Natural gas | 318 | 1,584 | 56.8% |
| 21 | Goldendale Generating StationKlickitat County · Natural gas | 303 | 1,604 | 60.5% |
| 22 | MossyrockLewis County · Hydro | 300 | 903 | 34.3% |
| 23 | Ferndale Generating StationWhatcom County · Natural gas | 286 | 1,324 | 52.9% |
| 24 | Wild HorseKittitas County · Wind | 273 | 591 | 24.7% |
| 25 | Tucannon River Wind FarmColumbia County · Wind | 267 | 737 | 31.5% |
| 26 | Windy Flats Wind ProjectKlickitat County · Wind | 262 | 651 | 28.3% |
| 27 | River Road Gen PlantClark County · Natural gas | 248 | 1,317* | 66.3% |
| 28 | Swift 1Skamania County · Hydro | 240 | 535 | 25.4% |
| 29 | Marengo Wind PlantColumbia County · Wind | 234 | 613 | 29.9% |
| 30 | GorgeWhatcom County · Hydro | 207 | 769 | 42.3% |
| 31 | White Creek Wind FarmKlickitat County · Wind | 204 | 536 | 30.0% |
| 32 | Big Horn Wind ProjectKlickitat County · Wind | 199 | 476 | 27.3% |
| 33 | DiabloWhatcom County · Hydro | 182 | 518 | 32.4% |
| 34 | FredericksonPierce County · Natural gas | 178 | 20.8 | 1.3% |
| 35 | FPL Energy Vansycle LLC (WA)Walla Walla County · Wind | 177 | 250 | 16.1% |
| 36 | EncogenWhatcom County · Natural gas | 176 | 354 | 22.9% |
| 37 | WhitehornWhatcom County · Natural gas | 169 | 65.2 | 4.4% |
| 38 | MayfieldLewis County · Hydro | 162 | 603 | 42.5% |
| 39 | Hopkins Ridge WindColumbia County · Wind | 157 | 345 | 25.2% |
| 40 | Juniper Canyon I Wind ProjectKlickitat County · Wind | 151 | 144 | 10.9% |
| 41 | Lund Hill SolarKlickitat County · Solar | 150 | 367 | 28.0% |
| 42 | Rattlesnake FlatAdams County · Wind | 144 | 415 | 32.9% |
| 43 | HF Sinclair Puget Sound RefiningSkagit County · Natural gas | 140 | 942 | 76.9% |
| 44 | Washington WindKlickitat County · Wind | 136 | 379 | 31.7% |
| 45 | MerwinCowlitz County · Hydro | 136 | 423 | 35.5% |
| 46 | Skookumchuck Wind FacilityThurston County · Wind | 136 | 393 | 33.0% |
| 47 | YaleCowlitz County · Hydro | 134 | 472 | 40.2% |
| 48 | Sumas Power PlantWhatcom County · Natural gas | 126 | 398 | 36.2% |
| 49 | H M JacksonSnohomish County · Hydro | 112 | 334 | 34.1% |
| 50 | PalouseWhitman County · Wind | 105 | 303 | 32.9% |
* Fewer than 12 months of 2025 reported, so the total is partial.
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