Directory of Power Plants in Washington
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Snoqualmie | Puget Sound Energy Inc | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 61.9 GWh | Dec 1897 | Dec 2023 | Water |
| Snoqualmie 2 | Puget Sound Energy Inc | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 104.4 GWh | Dec 1956 | Dec 2023 | Water |
| Swift 1 | PacifiCorp | Cougar, WA | PacifiCorp West (PACW) | 567.6 GWh | Nov 1958 | Sep 2024 | Water |
| Summer Falls Power Plant | Columbia Basin Hydropower | Coulee City, WA | Avista Corporation (AVA) | 447.2 GWh | Dec 1984 | Oct 2023 | Water |
| Sheep Creek Hydro | Sheep Creek Hydro Inc | Northport, WA | Avista Corporation (AVA) | 5.6 GWh | May 1986 | Dec 2023 | Water |
| Skookumchuck | TransAlta Centralia Gen LLC | Tenino, WA | Bonneville Power Administration (BPAT) | 3.2 GWh | Aug 1990 | Dec 2023 | Water |
| Spokane Waste to Energy | City of Spokane | Spokane, WA | Avista Corporation (AVA) | 131.5 GWh | Aug 1991 | Sep 2024 | 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) | 834.9 GWh | Feb 1993 | Dec 2023 | Natural Gas |
| South Fork Tolt | City of Seattle - (WA) | North Bend, WA | Seattle City Light (SCL) | 30.1 GWh | Oct 1995 | Dec 2023 | Water |
| Sierra Pacific Aberdeen | Sierra Pacific Industries | Aberdeen, WA | Bonneville Power Administration (BPAT) | 105.2 GWh | Feb 2003 | Dec 2023 | Wood/Wood Waste Solids |
| Sierra Pacific Burlington Facility | Sierra Pacific Industries | Mt Vernon, WA | Puget Sound Energy, Inc. (PSEI) | 160.1 GWh | Feb 2007 | Dec 2023 | Wood/Wood Waste Solids |
| Sagebrush Power Partners | Sagebrush Power Partners, LLC | Ellensburg, WA | Bonneville Power Administration (BPAT) | 255.0 GWh | Oct 2010 | Dec 2023 | Wind |
| Swauk Wind LLC | Gamesa Wind US LLC | Thorp, WA | Puget Sound Energy, Inc. (PSEI) | 6.0 GWh | Nov 2012 | Dec 2023 | Wind |
| Skookumchuck Wind Facility | Southern Power Co | Rainier, WA | Puget Sound Energy, Inc. (PSEI) | 410.3 GWh | Oct 2020 | Sep 2024 | Wind |
Browse Power Plants By Washington Counties
Figures are based on September 2024 generation numbers.| County | State Rank | Active Plants | Sep 2024 Generation |
|---|---|---|---|
| Grant County, WA | # 1 | 8 | 23.4 TWh |
| Douglas County, WA | # 2 | 2 | 12.4 TWh |
| Benton County, WA | # 3 | 6 | 10.2 TWh |
| Chelan County, WA | # 4 | 4 | 7.1 TWh |
| Lewis County, WA | # 5 | 8 | 7.0 TWh |
| Whatcom County, WA | # 6 | 13 | 5.7 TWh |
| Klickitat County, WA | # 7 | 16 | 5.3 TWh |
| Pend Oreille County, WA | # 8 | 3 | 3.5 TWh |
| Cowlitz County, WA | # 9 | 6 | 3.4 TWh |
| Grays Harbor County, WA | # 10 | 6 | 3.4 TWh |
| Columbia County, WA | # 11 | 4 | 3.1 TWh |
| Walla Walla County, WA | # 12 | 4 | 3.0 TWh |
| Pierce County, WA | # 13 | 13 | 2.7 TWh |
| Skagit County, WA | # 14 | 4 | 2.1 TWh |
| Clark County, WA | # 15 | 2 | 1.6 TWh |
| Whitman County, WA | # 16 | 6 | 1.6 TWh |
| County | State Rank | Active Plants | Sep 2024 Generation |
|---|---|---|---|
| Kittitas County, WA | # 17 | 9 | 1.1 TWh |
| Garfield County, WA | # 18 | 1 | 787.8 GWh |
| Lincoln County, WA | # 19 | 2 | 588.8 GWh |
| Skamania County, WA | # 20 | 1 | 567.6 GWh |
| Spokane County, WA | # 21 | 7 | 499.6 GWh |
| Adams County, WA | # 22 | 4 | 441.9 GWh |
| Thurston County, WA | # 23 | 3 | 439.8 GWh |
| Stevens County, WA | # 24 | 4 | 350.4 GWh |
| Snohomish County, WA | # 25 | 9 | 329.5 GWh |
| King County, WA | # 26 | 12 | 328.7 GWh |
| Mason County, WA | # 27 | 3 | 290.0 GWh |
| Yakima County, WA | # 28 | 12 | 105.4 GWh |
| Clallam County, WA | # 29 | 3 | 36.2 GWh |
| Jefferson County, WA | # 30 | 2 | 35.5 GWh |
| Franklin County, WA | # 31 | 3 | 17.2 GWh |