Directory of Power Plants in Washington
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Urtica Solar Project | Greenbacker Renewable Energy Corporation | Ellensburg, WA | Puget Sound Energy, Inc. (PSEI) | 10.6 GWh | Oct 2022 | Dec 2024 | Solar |
| Penstemon Solar Project | Greenbacker Renewable Energy Corporation | Ellensburg, WA | Puget Sound Energy, Inc. (PSEI) | 10.7 GWh | Dec 2021 | Dec 2024 | Solar |
| Camas Solar Project | Greenbacker Renewable Energy Corporation | Ellensburg, WA | Puget Sound Energy, Inc. (PSEI) | 9.7 GWh | May 2022 | Dec 2024 | Solar |
| Snoqualmie 2 | Puget Sound Energy Inc | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 108.9 GWh | Dec 1956 | Dec 2024 | Water |
| Skookumchuck Wind Facility | Southern Power Co | Rainier, WA | Puget Sound Energy, Inc. (PSEI) | 405.7 GWh | Oct 2020 | Mar 2026 | Wind |
| Fredonia (WA) | Puget Sound Energy Inc | Mt Vernon, WA | Puget Sound Energy, Inc. (PSEI) | 68.2 GWh | Apr 1984 | Mar 2026 | Natural Gas : 97.4% Distillate Fuel Oil : 2.6% |
| Ferndale Generating Station | Puget Sound Energy Inc | Ferndale, WA | Puget Sound Energy, Inc. (PSEI) | 845.1 GWh | Mar 1994 | Mar 2026 | Natural Gas |
| Snoqualmie | Puget Sound Energy Inc | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 65.9 GWh | Dec 1897 | Dec 2024 | Water |
| Cedar Hills | Bio Energy Washington, LLC | Maple Valley, WA | Puget Sound Energy, Inc. (PSEI) | 78.0 MWh | Mar 2009 | Dec 2024 | Distillate Fuel Oil |
| Encogen | Puget Sound Energy Inc | Bellingham, WA | Puget Sound Energy, Inc. (PSEI) | 284.0 GWh | Feb 1993 | Mar 2026 | Natural Gas |
| Vantage Wind Energy LLC | Invenergy Services LLC | Ellensburg, WA | Puget Sound Energy, Inc. (PSEI) | 273.2 GWh | Jul 2010 | Dec 2024 | Wind |
| Sumas Power Plant | Puget Sound Energy Inc | Sumas, WA | Puget Sound Energy, Inc. (PSEI) | 675.8 GWh | Feb 1993 | Dec 2024 | Natural Gas |
| Wild Horse | Puget Sound Energy Inc | Ellensburg, WA | Puget Sound Energy, Inc. (PSEI) | 618.9 GWh | Nov 2006 | Mar 2026 | Wind : 99.9% |
| Weeks Falls | Eagle Creek Renewable Energy, LLC | North Bend, WA | Puget Sound Energy, Inc. (PSEI) | 13.1 GWh | May 1990 | Dec 2024 | Water |
| Twin Falls Hydro | Central Rivers Power US, LLC | North Bend, WA | Puget Sound Energy, Inc. (PSEI) | 62.9 GWh | Nov 1989 | Dec 2024 | Water |
| Whitehorn | Puget Sound Energy Inc | Blaine, WA | Puget Sound Energy, Inc. (PSEI) | 230.3 GWh | Sep 1981 | Dec 2024 | Natural Gas : 97.5% Distillate Fuel Oil : 2.5% |
| Koma Kulshan | Eagle Creek Renewable Energy, LLC | Concrete, WA | Puget Sound Energy, Inc. (PSEI) | 24.8 GWh | Sep 1990 | Dec 2024 | Water |
| HF Sinclair Puget Sound Refining | HF Sinclair Corporation | Anacortes, WA | Puget Sound Energy, Inc. (PSEI) | 895.6 GWh | Aug 1991 | Mar 2026 | Natural Gas : 73.2% Other Gas : 26.8% |
| Mint Farm Generating Station | Puget Sound Energy Inc | Longview, WA | Puget Sound Energy, Inc. (PSEI) | 2.3 TWh | Dec 2007 | Dec 2024 | Natural Gas |
| Sierra Pacific Burlington Facility | Sierra Pacific Industries | Mt Vernon, WA | Puget Sound Energy, Inc. (PSEI) | 151.4 GWh | Feb 2007 | Dec 2024 | Wood/Wood Waste Solids |
| Diablo | City of Seattle - (WA) | Rockport, WA | Seattle City Light (SCL) | 361.4 GWh | Sep 1936 | Dec 2024 | Water |
| Boundary | City of Seattle - (WA) | Metaline, WA | Seattle City Light (SCL) | 3.6 TWh | Jul 1967 | Mar 2026 | Water |
| South Fork Tolt | City of Seattle - (WA) | North Bend, WA | Seattle City Light (SCL) | 44.6 GWh | Oct 1995 | Dec 2024 | Water |
| Cedar Falls (WA) | City of Seattle - (WA) | North Bend, WA | Seattle City Light (SCL) | 6.2 GWh | Oct 1921 | Dec 2024 | Water |
| Ross | City of Seattle - (WA) | Rockport, WA | Seattle City Light (SCL) | 697.9 GWh | Nov 1952 | Mar 2026 | Water |
| West Point Treatment Plant | King County Dept-Natural Res | Seattle, WA | Seattle City Light (SCL) | 9.6 GWh | May 2012 | Dec 2024 | Other Biomass Gas |
| University of Washington Power Plant | University of Washington | Seattle, WA | Seattle City Light (SCL) | 120.7 MWh | Dec 1968 | Mar 2026 | Distillate Fuel Oil |
| Gorge | City of Seattle - (WA) | Rockport, WA | Seattle City Light (SCL) | 893.9 GWh | Aug 1924 | Mar 2026 | Water |
Browse Power Plants By Washington Counties
Figures are based on March 2026 generation numbers.| County | State Rank | Active Plants | Mar 2026 Generation |
|---|---|---|---|
| Grant County, WA | # 1 | 9 | 28.9 TWh |
| Chelan County, WA | # 2 | 6 | 13.1 TWh |
| Douglas County, WA | # 3 | 1 | 11.2 TWh |
| Benton County, WA | # 4 | 7 | 8.0 TWh |
| Lewis County, WA | # 5 | 8 | 7.3 TWh |
| Klickitat County, WA | # 6 | 16 | 5.5 TWh |
| Whatcom County, WA | # 7 | 13 | 4.4 TWh |
| Pend Oreille County, WA | # 8 | 3 | 4.1 TWh |
| Cowlitz County, WA | # 9 | 6 | 3.8 TWh |
| Columbia County, WA | # 10 | 4 | 3.5 TWh |
| Grays Harbor County, WA | # 11 | 6 | 3.4 TWh |
| Walla Walla County, WA | # 12 | 4 | 3.4 TWh |
| Pierce County, WA | # 13 | 14 | 2.3 TWh |
| Whitman County, WA | # 14 | 6 | 1.8 TWh |
| Skagit County, WA | # 15 | 4 | 1.4 TWh |
| County | State Rank | Active Plants | Mar 2026 Generation |
|---|---|---|---|
| Clark County, WA | # 16 | 2 | 1.3 TWh |
| Kittitas County, WA | # 17 | 9 | 1.2 TWh |
| Garfield County, WA | # 18 | 2 | 806.7 GWh |
| Lincoln County, WA | # 19 | 2 | 641.5 GWh |
| Spokane County, WA | # 20 | 7 | 556.8 GWh |
| Skamania County, WA | # 21 | 1 | 548.4 GWh |
| Adams County, WA | # 22 | 4 | 465.3 GWh |
| Thurston County, WA | # 23 | 4 | 441.5 GWh |
| Snohomish County, WA | # 24 | 9 | 401.9 GWh |
| King County, WA | # 25 | 12 | 361.2 GWh |
| Stevens County, WA | # 26 | 4 | 346.7 GWh |
| Mason County, WA | # 27 | 3 | 304.6 GWh |
| Yakima County, WA | # 28 | 12 | 228.5 GWh |
| Franklin County, WA | # 29 | 3 | 12.8 GWh |
| Jefferson County, WA | # 30 | 3 | 3.2 GWh |