Directory of Power Plants in Washington
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Ice Harbor | USACE Northwestern Division | Burbank, WA | Bonneville Power Administration (BPAT) | 1.5 TWh | Dec 1961 | Mar 2026 | Water |
| Little Goose | USACE Northwestern Division | Dayton, WA | Bonneville Power Administration (BPAT) | 1.6 TWh | Mar 1970 | Mar 2026 | Water |
| Lower Monumental | USACE Northwestern Division | Kahlotus, WA | Bonneville Power Administration (BPAT) | 1.5 TWh | May 1969 | Mar 2026 | Water |
| Grand Coulee | U S Bureau of Reclamation | Grand Coulee, WA | Bonneville Power Administration (BPAT) | 18.5 TWh | Feb 1941 | Mar 2026 | Water |
| Lower Granite | USACE Northwestern Division | Pomeroy, WA | Bonneville Power Administration (BPAT) | 1.5 TWh | Mar 1975 | Mar 2026 | Water |
| Rock Island | PUD No 1 of Chelan County | Wenatchee, WA | Public Utility District No. 1 of Chelan County (CHPD) | 2.5 TWh | Sep 1931 | Mar 2026 | Water |
| Ross | City of Seattle - (WA) | Rockport, WA | Seattle City Light (SCL) | 697.9 GWh | Nov 1952 | Mar 2026 | Water |
| Gorge | City of Seattle - (WA) | Rockport, WA | Seattle City Light (SCL) | 893.9 GWh | Aug 1924 | Mar 2026 | Water |
| Boundary | City of Seattle - (WA) | Metaline, WA | Seattle City Light (SCL) | 3.6 TWh | Jul 1967 | Mar 2026 | Water |
| Encogen | Puget Sound Energy Inc | Bellingham, WA | Puget Sound Energy, Inc. (PSEI) | 284.0 GWh | Feb 1993 | Mar 2026 | Natural Gas |
| Nippon Dynawave Packaging Longview WA | Nippon Dynawave Packaging Co. | Longview, WA | Bonneville Power Administration (BPAT) | 271.2 GWh | Dec 1947 | Mar 2026 | Black Liquor : 54.7% Natural Gas : 18.7% Wood/Wood Waste Solids : 17.1% Subbituminous Coal : 6.4% Sludge Waste : 2.7% |
| Spokane Waste to Energy | City of Spokane | Spokane, WA | Avista Corporation (AVA) | 132.6 GWh | Aug 1991 | Mar 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| 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% |
| Ferndale Generating Station | Puget Sound Energy Inc | Ferndale, WA | Puget Sound Energy, Inc. (PSEI) | 845.1 GWh | Mar 1994 | Mar 2026 | Natural 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 |
| Chehalis Generating Facility | PacifiCorp | Chehalis, WA | Bonneville Power Administration (BPAT) | 2.3 TWh | Jul 2003 | Mar 2026 | Natural Gas |
| Grimes Way | Washington State University | Pullman, WA | Avista Corporation (AVA) | 107.0 MWh | Dec 2004 | Mar 2026 | Distillate Fuel Oil : 51.7% Natural Gas : 48.3% |
| Hopkins Ridge Wind | Puget Sound Energy Inc | Dayton, WA | Bonneville Power Administration (BPAT) | 350.2 GWh | Oct 2005 | Mar 2026 | Wind |
| Wild Horse | Puget Sound Energy Inc | Ellensburg, WA | Puget Sound Energy, Inc. (PSEI) | 618.9 GWh | Nov 2006 | Mar 2026 | Wind : 99.9% |
| Big Horn Wind Project | Avangrid Power LLC | Bickelton, WA | Avangrid Renewables, LLC (AVRN) | 499.2 GWh | Sep 2006 | Mar 2026 | Wind |
| Lower Snake River Wind Energy Project | Puget Sound Energy Inc | Pomeroy, WA | Bonneville Power Administration (BPAT) | 806.7 GWh | Jan 2012 | Mar 2026 | Wind |
| Big Horn Wind II | Avangrid Power LLC | Bickleton, WA | Avangrid Renewables, LLC (AVRN) | 108.3 GWh | Dec 2010 | Mar 2026 | Wind |
| Juniper Canyon I Wind Project | Avangrid Power LLC | Bickleton, WA | Avangrid Renewables, LLC (AVRN) | 110.0 GWh | Feb 2011 | Mar 2026 | Wind |
| Adams Nielson Solar | Strata Manager, LLC | Lind, WA | Avista Corporation (AVA) | 42.5 GWh | Oct 2018 | Mar 2026 | Solar |
| Rattlesnake Flat | Rattlesnake Flat, LLC | Ritzville, WA | Avista Corporation (AVA) | 422.8 GWh | Nov 2020 | Mar 2026 | Wind |
| Skookumchuck Wind Facility | Southern Power Co | Rainier, WA | Puget Sound Energy, Inc. (PSEI) | 405.7 GWh | Oct 2020 | Mar 2026 | Wind |
| Lund Hill Solar | Avangrid Power LLC | Bickleton, WA | Avangrid Renewables, LLC (AVRN) | 366.2 GWh | Sep 2022 | Mar 2026 | Solar |
| Goose Prairie Solar | Goose Prairie Solar LLC | Moxee, WA | Bonneville Power Administration (BPAT) | 178.1 GWh | Nov 2024 | Mar 2026 | Solar |
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 |