Directory of Power Plants in Washington
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Snoqualmie 2 | Puget Sound Energy Inc | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 106.8 GWh | Dec 1956 | Dec 2025 | Water |
| South Fork Tolt | City of Seattle - (WA) | North Bend, WA | Seattle City Light (SCL) | 48.6 GWh | Oct 1995 | Dec 2025 | Water |
| Spokane Waste to Energy | City of Spokane - (WA) | Spokane, WA | Avista Corporation (AVA) | 132.4 GWh | Aug 1991 | May 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Sumas Power Plant | Puget Sound Energy Inc | Sumas, WA | Puget Sound Energy, Inc. (PSEI) | 675.8 GWh | Feb 1993 | Dec 2024 | Natural Gas |
| Summer Falls Power Plant | Columbia Basin Hydropower | Coulee City, WA | Avista Corporation (AVA) | 391.2 GWh | Dec 1984 | Oct 2025 | Water |
| Swauk Wind LLC | Gamesa Wind US LLC | Thorp, WA | Puget Sound Energy, Inc. (PSEI) | 2.9 GWh | Nov 2012 | Dec 2025 | Wind |
| Swift 1 | PacifiCorp | Cougar, WA | PacifiCorp West (PACW) | 508.0 GWh | Nov 1958 | May 2026 | Water |
| Tieton Dam Hydro Electric Project | City of Burbank Water and Power - (CA) | Rimrock, WA | PacifiCorp West (PACW) | 24.2 GWh | Aug 2006 | Sep 2025 | Water |
| Transalta Centralia Generation | TransAlta Centralia Gen LLC | Centralia, WA | Bonneville Power Administration (BPAT) | 3.2 TWh | Nov 1972 | Dec 2025 | Subbituminous Coal : 99.7% |
| Tucannon River Wind Farm | Portland General Electric Co | Dayton, WA | Portland General Electric Company (PGE) | 736.8 GWh | Nov 2014 | Dec 2025 | Wind |
| Twin Falls Hydro | Central Rivers Power US, LLC | North Bend, WA | Puget Sound Energy, Inc. (PSEI) | 59.3 GWh | Nov 1989 | Dec 2025 | Water |
| Twin Reservoirs | City of Walla Walla - (WA) | Walla Walla, WA | Bonneville Power Administration (BPAT) | 6.9 GWh | Mar 1988 | Dec 2025 | Water |
| University of Washington Power Plant | University of Washington | Seattle, WA | Seattle City Light (SCL) | 129.4 MWh | Dec 1968 | May 2026 | Distillate Fuel Oil |
| Upper Baker | Puget Sound Energy Inc | Concrete, WA | Puget Sound Energy, Inc. (PSEI) | 332.7 GWh | Dec 1958 | Dec 2025 | Water |
| Upper Falls | Avista Corp | Spokane, WA | Avista Corporation (AVA) | 42.0 GWh | Mar 1922 | Dec 2025 | Water |
| Upriver Dam Hydro Plant | City of Spokane - (WA) | Spokane, WA | Avista Corporation (AVA) | 39.9 GWh | Dec 1935 | Dec 2025 | Water |
| Urtica Solar Project | Altus Power America Management, LLC | Ellensburg, WA | Puget Sound Energy, Inc. (PSEI) | 11.4 GWh | Oct 2022 | Dec 2025 | Solar |
| Vantage Wind Energy LLC | Invenergy Services LLC | Ellensburg, WA | Puget Sound Energy, Inc. (PSEI) | 253.2 GWh | Jul 2010 | Dec 2025 | Wind |
| Wanapum | PUD No 2 of Grant County - (WA) | Beverly, WA | Public Utility District No. 2 of Grant County, Washington (GCPD) | 5.3 TWh | May 1963 | May 2026 | Water |
| Washington Wind | Washington Wind LLC | Goldendale, WA | Bonneville Power Administration (BPAT) | 379.0 GWh | Apr 2009 | Dec 2025 | Wind |
| Weeks Falls | Eagle Creek Renewable Energy, LLC | North Bend, WA | Puget Sound Energy, Inc. (PSEI) | 10.7 GWh | May 1990 | Dec 2025 | Water |
| Wells | PUD No 1 of Douglas County - (WA) | Chelan, WA | PUD No. 1 of Douglas County (DOPD) | 4.3 TWh | Aug 1967 | May 2026 | Water |
| West Point Treatment Plant | King County Dept-Natural Res - (WA) | Seattle, WA | Seattle City Light (SCL) | 14.3 GWh | May 2012 | Dec 2025 | Other Biomass Gas |
| White Creek Wind Farm | White Creek Wind 1 LLC | Roosevelt, WA | Bonneville Power Administration (BPAT) | 536.0 GWh | Oct 2007 | Dec 2025 | Wind |
| Whitehorn | Puget Sound Energy Inc | Blaine, WA | Puget Sound Energy, Inc. (PSEI) | 65.2 GWh | Sep 1981 | Dec 2025 | Natural Gas : 99.8% |
| Wild Horse | Puget Sound Energy Inc | Ellensburg, WA | Puget Sound Energy, Inc. (PSEI) | 603.3 GWh | Nov 2006 | May 2026 | Wind : 99.9% |
| Windy Flats Wind Project | Windy Flats Partners LLC | Centerville, WA | Bonneville Power Administration (BPAT) | 650.9 GWh | Sep 2009 | Dec 2025 | Wind |
| Wynoochee | City of Tacoma - (WA) | Montesano, WA | City of Tacoma, Department of Public Utilities, Light Division (TPWR) | 22.5 GWh | Dec 1993 | Dec 2025 | Water |
| Yale | PacifiCorp | Amboy, WA | PacifiCorp West (PACW) | 472.5 GWh | Aug 1953 | Dec 2025 | Water |
| Yelm | City of Centralia - (WA) | Yelm, WA | Bonneville Power Administration (BPAT) | 32.2 GWh | Nov 1930 | Dec 2025 | Water |
| Youngs Creek Hydroelectric Project | PUD No 1 of Snohomish County - (WA) | Monroe, WA | Bonneville Power Administration (BPAT) | 12.9 GWh | Oct 2011 | Dec 2025 | Water |
Browse Power Plants By Washington Counties
Figures are based on May 2026 generation numbers.| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Adams County, WA | # 22 | 4 | 475.8 GWh |
| Benton County, WA | # 4 | 7 | 9.4 TWh |
| Chelan County, WA | # 2 | 6 | 13.4 TWh |
| Clark County, WA | # 16 | 2 | 1.3 TWh |
| Columbia County, WA | # 10 | 4 | 3.3 TWh |
| Cowlitz County, WA | # 9 | 6 | 3.7 TWh |
| Douglas County, WA | # 3 | 1 | 11.5 TWh |
| Franklin County, WA | # 29 | 3 | 10.9 GWh |
| Garfield County, WA | # 18 | 2 | 802.3 GWh |
| Grant County, WA | # 1 | 9 | 29.0 TWh |
| Grays Harbor County, WA | # 12 | 6 | 2.4 TWh |
| Jefferson County, WA | # 30 | 3 | 8.2 GWh |
| King County, WA | # 24 | 12 | 392.2 GWh |
| Kittitas County, WA | # 17 | 9 | 1.2 TWh |
| Klickitat County, WA | # 6 | 17 | 5.4 TWh |
| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Lewis County, WA | # 5 | 8 | 7.3 TWh |
| Lincoln County, WA | # 19 | 2 | 624.1 GWh |
| Mason County, WA | # 27 | 3 | 273.6 GWh |
| Pend Oreille County, WA | # 8 | 3 | 4.2 TWh |
| Pierce County, WA | # 13 | 14 | 2.1 TWh |
| Skagit County, WA | # 15 | 4 | 1.5 TWh |
| Skamania County, WA | # 21 | 1 | 508.0 GWh |
| Snohomish County, WA | # 25 | 9 | 359.3 GWh |
| Spokane County, WA | # 20 | 7 | 560.3 GWh |
| Stevens County, WA | # 26 | 4 | 302.8 GWh |
| Thurston County, WA | # 23 | 4 | 445.4 GWh |
| Walla Walla County, WA | # 11 | 4 | 3.3 TWh |
| Whatcom County, WA | # 7 | 13 | 4.2 TWh |
| Whitman County, WA | # 14 | 6 | 1.8 TWh |
| Yakima County, WA | # 28 | 12 | 247.1 GWh |