Directory of Power Plants in Washington
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Swift 1 | PacifiCorp | Cougar, WA | PacifiCorp West (PACW) | 593.9 GWh | Nov 1958 | Jun 2024 | Water |
| Sumas Power Plant | Puget Sound Energy Inc | Sumas, WA | Puget Sound Energy, Inc. (PSEI) | 499.3 GWh | Feb 1993 | Dec 2022 | Natural Gas |
| Summer Falls Power Plant | Columbia Basin Hydropower | Coulee City, WA | Avista Corporation (AVA) | 467.4 GWh | Dec 1984 | Oct 2023 | Water |
| Skookumchuck Wind Facility | Southern Power Co | Rainier, WA | Puget Sound Energy, Inc. (PSEI) | 441.8 GWh | Oct 2020 | Jun 2024 | Wind |
| Sagebrush Power Partners | Sagebrush Power Partners, LLC | Ellensburg, WA | Bonneville Power Administration (BPAT) | 271.5 GWh | Oct 2010 | Dec 2023 | Wind |
| Spokane Waste to Energy | City of Spokane | Spokane, WA | Avista Corporation (AVA) | 139.6 GWh | Aug 1991 | Jun 2024 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Sierra Pacific Aberdeen | Sierra Pacific Industries | Aberdeen, WA | Bonneville Power Administration (BPAT) | 128.4 GWh | Feb 2003 | Dec 2022 | Wood/Wood Waste Solids |
| Snoqualmie 2 | Puget Sound Energy Inc | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 113.5 GWh | Dec 1956 | Dec 2023 | Water |
| Sierra Pacific Burlington Facility | Sierra Pacific Industries | Mt Vernon, WA | Puget Sound Energy, Inc. (PSEI) | 105.7 GWh | Feb 2007 | Dec 2022 | Wood/Wood Waste Solids |
| Snoqualmie | Puget Sound Energy Inc | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 65.5 GWh | Dec 1897 | Dec 2023 | Water |
| South Fork Tolt | City of Seattle - (WA) | North Bend, WA | Seattle City Light (SCL) | 34.4 GWh | Oct 1995 | Dec 2023 | Water |
| Swauk Wind LLC | Gamesa Wind US LLC | Thorp, WA | Puget Sound Energy, Inc. (PSEI) | 6.5 GWh | Nov 2012 | Dec 2023 | Wind |
| Sheep Creek Hydro | Sheep Creek Hydro Inc | Northport, WA | Avista Corporation (AVA) | 6.1 GWh | May 1986 | Dec 2023 | Water |
| Skookumchuck | TransAlta Centralia Gen LLC | Tenino, WA | Bonneville Power Administration (BPAT) | 3.6 GWh | Aug 1990 | Dec 2023 | Water |
Browse Power Plants By Washington Counties
Figures are based on June 2024 generation numbers.| County | State Rank | Active Plants | Jun 2024 Generation |
|---|---|---|---|
| Grant County, WA | # 1 | 8 | 25.3 TWh |
| Douglas County, WA | # 2 | 2 | 13.5 TWh |
| Benton County, WA | # 3 | 6 | 10.6 TWh |
| Chelan County, WA | # 4 | 4 | 7.7 TWh |
| Lewis County, WA | # 5 | 8 | 7.6 TWh |
| Whatcom County, WA | # 6 | 13 | 5.7 TWh |
| Klickitat County, WA | # 7 | 15 | 5.2 TWh |
| Grays Harbor County, WA | # 8 | 6 | 3.7 TWh |
| Pend Oreille County, WA | # 9 | 3 | 3.6 TWh |
| Walla Walla County, WA | # 10 | 4 | 3.4 TWh |
| Columbia County, WA | # 11 | 4 | 3.4 TWh |
| Cowlitz County, WA | # 12 | 6 | 3.3 TWh |
| Skagit County, WA | # 13 | 4 | 2.6 TWh |
| Pierce County, WA | # 14 | 13 | 2.3 TWh |
| Clark County, WA | # 15 | 2 | 1.9 TWh |
| Whitman County, WA | # 16 | 6 | 1.8 TWh |
| County | State Rank | Active Plants | Jun 2024 Generation |
|---|---|---|---|
| Kittitas County, WA | # 17 | 9 | 1.2 TWh |
| Garfield County, WA | # 18 | 1 | 838.1 GWh |
| Lincoln County, WA | # 19 | 2 | 640.2 GWh |
| Skamania County, WA | # 20 | 1 | 593.9 GWh |
| Spokane County, WA | # 21 | 7 | 547.3 GWh |
| Snohomish County, WA | # 22 | 8 | 492.7 GWh |
| Thurston County, WA | # 23 | 3 | 471.6 GWh |
| Adams County, WA | # 24 | 4 | 464.3 GWh |
| Stevens County, WA | # 25 | 4 | 384.8 GWh |
| King County, WA | # 26 | 12 | 369.6 GWh |
| Mason County, WA | # 27 | 3 | 313.3 GWh |
| Yakima County, WA | # 28 | 12 | 112.1 GWh |
| Clallam County, WA | # 29 | 3 | 37.7 GWh |
| Franklin County, WA | # 30 | 3 | 18.0 GWh |
| Jefferson County, WA | # 31 | 2 | 219.0 MWh |