Power plants in Washington
128 operating power projects with 29,661 MW of nameplate capacity, from EIA-860M for August 2026.
Projects
128
Nameplate capacity
29,661 MW
Counties with a plant
30
Operators
62
Capacity by fuel
Hydro · 19,757 MW · 68Natural gas · 3,664 MW · 14Wind · 3,387 MW · 23Nuclear · 1,200 MW · 1Coal · 730 MW · 1Solar · 348 MW · 9Pumped storage · 314 MWOther fuels · 257 MW · 11Battery storage · 4 MW · 1
MW is nameplate from operating generators and batteries. Plant counts use each project's primary fuel, so a coal and gas plant counts once.
Largest power plants in Washington
Top 50 · All 128 plants| Plant | Primary fuel | MW | County | Operator |
|---|---|---|---|---|
| Grand Coulee | Hydro | 6,809 | Grant | U S Bureau of Reclamation |
| Chief Joseph | Hydro | 1,744 | Douglas | USACE Northwestern Division |
| Rocky Reach | Hydro | 1,349 | Chelan | PUD No 1 of Chelan County - (WA) |
| Wanapum | Hydro | 1,220 | Grant | PUD No 2 of Grant County - (WA) |
| Columbia Generating Station | Nuclear | 1,200 | Benton | Energy Northwest- Columbia |
| Boundary | Hydro | 1,160 | Pend Oreille | City of Seattle - (WA) |
| Priest Rapids | Hydro | 950 | Grant | PUD No 2 of Grant County - (WA) |
| Wells | Hydro | 789 | Chelan | PUD No 1 of Douglas County - (WA) |
| Transalta Centralia Generation | Coal | 730 | Lewis | TransAlta Centralia Gen LLC |
| Grays Harbor Energy Facility | Natural gas | 715 | Grays Harbor | Invenergy Services LLC |
Washington power plants by fuel
Newest plants in Washington
Ordered by the month the first generator began operating.
Ostrea Solar, LLCSolar · 80 MW · Yakima County · June 2026Goose Prairie SolarSolar · 80 MW · Yakima County · December 2024Urtica Solar ProjectSolar · 5 MW · Kittitas County · November 2022Lund Hill SolarSolar · 150 MW · Klickitat County · October 2022Camas Solar ProjectSolar · 5 MW · Kittitas County · June 2022Penstemon Solar ProjectSolar · 5 MW · Kittitas County · January 2022
Counties with the most capacity
Grant County5 plants · 9,098 MWChelan County4 plants · 2,712 MWLewis County6 plants · 1,883 MWDouglas County1 plant · 1,744 MWWhatcom County11 plants · 1,717 MWKlickitat County11 plants · 1,708 MWBenton County5 plants · 1,322 MWWalla Walla County4 plants · 1,277 MWPend Oreille County2 plants · 1,250 MW
Largest operators in Washington
U S Bureau of Reclamation3 plants · 6,834 MW
USACE Northwestern Division5 plants · 4,057 MW
Puget Sound Energy Inc15 plants · 2,591 MW
PUD No 2 of Grant County - (WA)2 plants · 2,170 MW
City of Seattle - (WA)6 plants · 2,046 MW
Grouped by EIA operator name. Parent companies are not merged.
All 128 plants in Washington, by county
Adams County 3 plants
- Rattlesnake Flat Wind · 144 MW
- Adams Nielson Solar Solar · 19.2 MW
- Russell D Smith Hydro · 6.1 MW
Benton County 5 plants
- Columbia Generating Station Nuclear · 1,200 MW
- Nine Canyon Wind · 95.9 MW
- Chandler Hydro · 12 MW
- McNary Dam Fish Attraction Project Hydro · 10 MW
- Horn Rapids Solar, Storage and Training Solar · 4.2 MW
Chelan County 4 plants
- Rocky Reach Hydro · 1,349.2 MW
- Wells Hydro · 789.4 MW
- Rock Island Hydro · 514.2 MW
- Chelan Hydro · 59.2 MW
Clark County 1 plant
- River Road Gen Plant Natural gas · 248 MW
Columbia County 4 plants
- Little Goose Hydro · 540 MW
- Tucannon River Wind Farm Wind · 266.8 MW
- Marengo Wind Plant Wind · 234 MW
- Hopkins Ridge Wind Wind · 156.6 MW
Cowlitz County 5 plants
- Mint Farm Generating Station Natural gas · 319 MW
- Merwin Hydro · 136 MW
- Yale Hydro · 134 MW
- Nippon Dynawave Packaging Longview WA Wood biomass · 62.4 MW
- Longview Fibre Wood biomass · 45 MW
Douglas County 1 plant
- Chief Joseph Hydro · 1,743.8 MW
Franklin County 2 plants
- Potholes East Canal 66.0 Hydro · 2.3 MW
- Eltopia Branch Canal 4.6 Hydro · 2.2 MW
Garfield County 1 plant
- Lower Snake River Wind Energy Project Wind · 342.7 MW
Grant County 5 plants
- Grand Coulee Hydro · 6,809 MW
- Wanapum Hydro · 1,220 MW
- Priest Rapids Hydro · 950 MW
- Summer Falls Power Plant Hydro · 92 MW
- Main Canal Headworks Hydro · 26.8 MW
Grays Harbor County 4 plants
- Grays Harbor Energy Facility Natural gas · 714.9 MW
- Sierra Pacific Aberdeen Wood biomass · 18 MW
- Wynoochee Hydro · 12.8 MW
- Coastal Energy Project Wind · 6 MW
Jefferson County 1 plant
- Port Townsend Paper Wood biomass · 7.5 MW
King County 11 plants
- Snoqualmie 2 Hydro · 38.7 MW
- Cedar Falls (WA) Hydro · 30 MW
- Twin Falls Hydro Hydro · 24 MW
- South Fork Tolt Hydro · 16.8 MW
- Snoqualmie Hydro · 12.8 MW
- Calligan Creek Hydroelectric Project Hydro · 6 MW
- Hancock Creek Hydroelectric Project Hydro · 6 MW
- Cedar Hills Landfill gas · 5.4 MW
- West Point Treatment Plant Biomass · 4.6 MW
- Weeks Falls Hydro · 4.3 MW
- Black Creek Hydro · 3.7 MW
Kittitas County 7 plants
- Wild Horse Wind · 273.1 MW
- Sagebrush Power Partners Wind · 100.7 MW
- Vantage Wind Energy LLC Wind · 90 MW
- Urtica Solar Project Solar · 5 MW
- Penstemon Solar Project Solar · 5 MW
- Camas Solar Project Solar · 5 MW
- Swauk Wind LLC Wind · 4.3 MW
Klickitat County 11 plants
- Goldendale Generating Station Natural gas · 302.8 MW
- Windy Flats Wind Project Wind · 262.2 MW
- White Creek Wind Farm Wind · 204 MW
- Big Horn Wind Project Wind · 199 MW
- Juniper Canyon I Wind Project Wind · 151.2 MW
- Lund Hill Solar Solar · 150 MW
- Washington Wind Wind · 136.3 MW
- Goodnoe Hills Wind · 103.4 MW
- Harvest Wind Project Wind · 98.9 MW
- Big Horn Wind II Wind · 50 MW
- Linden Wind Energy Project Wind · 50 MW
Lewis County 6 plants
- Transalta Centralia Generation Coal · 729.9 MW
- Chehalis Generating Facility Natural gas · 593.3 MW
- Mossyrock Hydro · 300 MW
- Mayfield Hydro · 162 MW
- Cowlitz Falls Hydro · 70 MW
- Packwood Hydro · 27.5 MW
Lincoln County 2 plants
- Long Lake Hydro · 70 MW
- Little Falls (WA) Hydro · 43.2 MW
Mason County 3 plants
- Cushman 2 Hydro · 84.6 MW
- Cushman 1 Hydro · 50.4 MW
- Lilliwaup Falls Generating Hydro · 1.4 MW
Pend Oreille County 2 plants
- Boundary Hydro · 1,159.7 MW
- Box Canyon Hydro · 90 MW
Pierce County 6 plants
- Frederickson Power LP Natural gas · 318.3 MW
- Frederickson Natural gas · 177.8 MW
- LaGrande Hydro · 64 MW
- Alder Hydro · 51 MW
- Electron Hydro · 22.8 MW
- LRI LFGTE Facility Landfill gas · 4.5 MW
Skagit County 3 plants
- HF Sinclair Puget Sound Refining Natural gas · 139.8 MW
- Lower Baker Hydro · 103.9 MW
- Sierra Pacific Burlington Facility Wood biomass · 28 MW
Skamania County 1 plant
- Swift 1 Hydro · 240 MW
Snohomish County 4 plants
- H M Jackson Hydro · 111.8 MW
- Youngs Creek Hydroelectric Project Hydro · 7.5 MW
- Darrington Wood biomass · 4.5 MW
- Arlington Microgrid Solar · 1.5 MW
Spokane County 7 plants
- Northeast (WA) Natural gas · 61.8 MW
- Nine Mile Hydro · 37.6 MW
- Spokane Waste to Energy Municipal solid waste · 26 MW
- Boulder Park Natural gas · 24.6 MW
- Upriver Dam Hydro Plant Hydro · 17.6 MW
- Monroe Street Hydro · 14.8 MW
- Upper Falls Hydro · 10 MW
Stevens County 3 plants
- Kettle Falls Generating Station Wood biomass · 57.9 MW
- Meyers Falls Hydro · 1.8 MW
- Sheep Creek Hydro Hydro · 1.6 MW
Thurston County 3 plants
- Skookumchuck Wind Facility Wind · 136 MW
- Yelm Hydro · 12 MW
- Skookumchuck Hydro · 1 MW
Walla Walla County 4 plants
- Lower Monumental Hydro · 675 MW
- Ice Harbor Hydro · 423 MW
- FPL Energy Vansycle LLC (WA) Wind · 176.9 MW
- Twin Reservoirs Hydro · 2.2 MW
Whatcom County 11 plants
- Ross Hydro · 450 MW
- Ferndale Generating Station Natural gas · 285.5 MW
- Gorge Hydro · 207.3 MW
- Diablo Hydro · 182.4 MW
- Encogen Natural gas · 176.4 MW
- Whitehorn Natural gas · 169.2 MW
- Sumas Power Plant Natural gas · 125.5 MW
- Upper Baker Hydro · 104.8 MW
- Koma Kulshan Hydro · 12 MW
- Glacier Battery Storage Battery storage · 2 MW
- Nooksack Hydro Hydro · 1.5 MW
Whitman County 2 plants
- Lower Granite Hydro · 675 MW
- Palouse Wind · 105.3 MW
Yakima County 6 plants
- Ostrea Solar, LLC Solar · 80 MW
- Goose Prairie Solar Solar · 80 MW
- Tieton Dam Hydro Electric Project Hydro · 13.8 MW
- Roza Hydro · 12.9 MW
- Cowiche Hydro · 1.7 MW
- Orchard Avenue 1 Hydro · 1.6 MW
Questions about power plants in Washington
How many power plants are in Washington?
EIA-860M for August 2026 lists 128 operating power projects in Washington, with 29,661 MW of nameplate capacity including batteries.
What is the largest power plant in Washington?
Grand Coulee in Grant County, with 6,809 MW of nameplate capacity. The next largest is Chief Joseph, with 1,743.8 MW.
How much of Washington's capacity is natural gas?
3,664 MW, about 12% of nameplate capacity. 14 projects have natural gas as their primary fuel.
Source: EIA-860M August 2026, published 2026-09-24. Page updated 2026-10-04. Data sources