Directory of Power Plants in Washington
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| University of Washington Power Plant | University of Washington | Seattle, WA | Seattle City Light (SCL) | 127.4 MWh | Dec 1968 | Jun 2026 | Distillate Fuel Oil |
| Cushman 1 | City of Tacoma - (WA) | Shelton, WA | City of Tacoma, Department of Public Utilities, Light Division (TPWR) | 107.8 GWh | May 1926 | Dec 2025 | Water |
| Cushman 2 | City of Tacoma - (WA) | Shelton, WA | City of Tacoma, Department of Public Utilities, Light Division (TPWR) | 160.5 GWh | Nov 1930 | Dec 2025 | Water |
| Mossyrock | City of Tacoma - (WA) | Silver Creek, WA | City of Tacoma, Department of Public Utilities, Light Division (TPWR) | 1.0 TWh | Sep 1968 | Jun 2026 | Water |
| Mayfield | City of Tacoma - (WA) | Silver Creek, WA | City of Tacoma, Department of Public Utilities, Light Division (TPWR) | 602.5 GWh | Feb 1963 | Dec 2025 | Water |
| Calligan Creek Hydroelectric Project | PUD No 1 of Snohomish County - (WA) | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 12.6 GWh | Jan 2018 | Dec 2025 | Water |
| Snoqualmie | Puget Sound Energy Inc | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 59.2 GWh | Dec 1897 | Dec 2025 | Water |
| Snoqualmie 2 | Puget Sound Energy Inc | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 106.8 GWh | Dec 1956 | Dec 2025 | Water |
| Black Creek | Black Creek Hydro Inc | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 8.7 GWh | Jan 1994 | Dec 2025 | Water |
| Hancock Creek Hydroelectric Project | PUD No 1 of Snohomish County - (WA) | Snoqualmie, WA | Puget Sound Energy, Inc. (PSEI) | 18.3 GWh | Jan 2018 | Dec 2025 | Water |
| Northeast (WA) | Avista Corp | Spokane, WA | Avista Corporation (AVA) | 526.0 MWh | Nov 1978 | Dec 2025 | Natural Gas |
| Monroe Street | Avista Corp | Spokane, WA | Avista Corporation (AVA) | 87.5 GWh | Nov 1992 | Dec 2025 | Water |
| Boulder Park | Avista Corp | Spokane, WA | Avista Corporation (AVA) | 125.8 GWh | Apr 2002 | Dec 2025 | Natural Gas |
| 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 |
| Spokane Waste to Energy | City of Spokane - (WA) | Spokane, WA | Avista Corporation (AVA) | 132.1 GWh | Aug 1991 | Jun 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| H M Jackson | PUD No 1 of Snohomish County - (WA) | Sultan, WA | Bonneville Power Administration (BPAT) | 333.6 GWh | May 1984 | Dec 2025 | Water |
| Sumas Power Plant | Puget Sound Energy Inc | Sumas, WA | Puget Sound Energy, Inc. (PSEI) | 675.8 GWh | Feb 1993 | Dec 2024 | Natural Gas |
| Frederickson Power LP | Frederickson Power LP | Tacoma, WA | Bonneville Power Administration (BPAT) | 1.6 TWh | Jul 2002 | Dec 2025 | Natural Gas |
| Frederickson | Puget Sound Energy Inc | Tacoma, WA | Puget Sound Energy, Inc. (PSEI) | 20.8 GWh | Oct 1981 | Dec 2025 | Natural Gas : 98.3% Distillate Fuel Oil : 1.7% |
| Skookumchuck | TransAlta Centralia Gen LLC | Tenino, WA | Bonneville Power Administration (BPAT) | 1.8 GWh | Aug 1990 | Apr 2025 | Water |
| Swauk Wind LLC | Gamesa Wind US LLC | Thorp, WA | Puget Sound Energy, Inc. (PSEI) | 2.9 GWh | Nov 2012 | Dec 2025 | Wind |
| Cowiche | Yakima-Tieton Irrigation Dist | Tieton, WA | PacifiCorp West (PACW) | 3.4 GWh | Feb 1987 | Oct 2025 | Water |
| FPL Energy Vansycle LLC (WA) | FPL Energy Vansycle LLC | Touchet, WA | Bonneville Power Administration (BPAT) | 249.7 GWh | Nov 2001 | Dec 2025 | Wind |
| River Road Gen Plant | PUD No 1 of Clark County - (WA) | Vancouver, WA | Bonneville Power Administration (BPAT) | 812.4 GWh | Nov 1997 | Jun 2026 | Natural Gas |
| Twin Reservoirs | City of Walla Walla - (WA) | Walla Walla, WA | Bonneville Power Administration (BPAT) | 6.9 GWh | Mar 1988 | Dec 2025 | Water |
| Rock Island | PUD No 1 of Chelan County - (WA) | Wenatchee, WA | Public Utility District No. 1 of Chelan County (CHPD) | 2.6 TWh | Sep 1931 | Jun 2026 | Water |
| Chelan | PUD No 1 of Chelan County - (WA) | Wenatchee, WA | Public Utility District No. 1 of Chelan County (CHPD) | 325.2 GWh | Aug 1927 | Dec 2025 | Water |
| Rocky Reach | PUD No 1 of Chelan County - (WA) | Wenatchee, WA | Public Utility District No. 1 of Chelan County (CHPD) | 6.4 TWh | May 1961 | Jun 2026 | Water |
| Roza | U S Bureau of Reclamation | Yakima, WA | Bonneville Power Administration (BPAT) | 38.2 GWh | Jul 1958 | Dec 2025 | Water |
| Orchard Avenue 1 | Yakima-Tieton Irrigation Dist | Yakima, WA | PacifiCorp West (PACW) | 2.9 GWh | Feb 1987 | Oct 2025 | Water |
| Yelm | City of Centralia - (WA) | Yelm, WA | Bonneville Power Administration (BPAT) | 32.2 GWh | Nov 1930 | Dec 2025 | Water |
Browse Power Plants By Washington Counties
Figures are based on June 2026 generation numbers.| County | State Rank | Active Plants | Jun 2026 Generation |
|---|---|---|---|
| Grant County, WA | # 1 | 9 | 29.8 TWh |
| Chelan County, WA | # 2 | 6 | 13.6 TWh |
| Douglas County, WA | # 3 | 1 | 11.7 TWh |
| Benton County, WA | # 4 | 7 | 10.1 TWh |
| Lewis County, WA | # 5 | 8 | 7.3 TWh |
| Klickitat County, WA | # 6 | 17 | 5.4 TWh |
| Pend Oreille County, WA | # 7 | 3 | 4.4 TWh |
| Whatcom County, WA | # 8 | 13 | 4.1 TWh |
| Cowlitz County, WA | # 9 | 6 | 3.7 TWh |
| Columbia County, WA | # 10 | 4 | 3.3 TWh |
| Walla Walla County, WA | # 11 | 4 | 3.2 TWh |
| Grays Harbor County, WA | # 12 | 6 | 2.1 TWh |
| Pierce County, WA | # 13 | 14 | 2.1 TWh |
| Whitman County, WA | # 14 | 6 | 1.8 TWh |
| Skagit County, WA | # 15 | 4 | 1.5 TWh |
| County | State Rank | Active Plants | Jun 2026 Generation |
|---|---|---|---|
| Kittitas County, WA | # 16 | 9 | 1.2 TWh |
| Clark County, WA | # 17 | 2 | 812.4 GWh |
| Garfield County, WA | # 18 | 2 | 811.6 GWh |
| Lincoln County, WA | # 19 | 2 | 624.1 GWh |
| Spokane County, WA | # 20 | 7 | 560.0 GWh |
| Skamania County, WA | # 21 | 1 | 503.6 GWh |
| Adams County, WA | # 22 | 4 | 456.9 GWh |
| Thurston County, WA | # 23 | 4 | 454.8 GWh |
| King County, WA | # 24 | 12 | 392.2 GWh |
| Snohomish County, WA | # 25 | 9 | 359.3 GWh |
| Stevens County, WA | # 26 | 4 | 302.8 GWh |
| Mason County, WA | # 27 | 3 | 273.6 GWh |
| Yakima County, WA | # 28 | 12 | 269.1 GWh |
| Franklin County, WA | # 29 | 3 | 10.9 GWh |
| Jefferson County, WA | # 30 | 3 | 8.2 GWh |