Directory of Power Plants in Washington
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Mossyrock | City of Tacoma - (WA) | Silver Creek, WA | City of Tacoma, Department of Public Utilities, Light Division (TPWR) | 1.0 TWh | Sep 1968 | Aug 2026 | Water |
| Chief Joseph | USACE Northwestern Division | Bridgeport, WA | Bonneville Power Administration (BPAT) | 11.9 TWh | Aug 1955 | Aug 2026 | Water |
| Ice Harbor | USACE Northwestern Division | Burbank, WA | Bonneville Power Administration (BPAT) | 1.5 TWh | Dec 1961 | Aug 2026 | Water |
| Little Goose | USACE Northwestern Division | Dayton, WA | Bonneville Power Administration (BPAT) | 1.6 TWh | Mar 1970 | Aug 2026 | Water |
| Lower Monumental | USACE Northwestern Division | Kahlotus, WA | Bonneville Power Administration (BPAT) | 1.5 TWh | May 1969 | Aug 2026 | Water |
| Grand Coulee | U S Bureau of Reclamation | Grand Coulee, WA | Bonneville Power Administration (BPAT) | 19.0 TWh | Feb 1941 | Aug 2026 | Water |
| Lower Granite | USACE Northwestern Division | Pomeroy, WA | Bonneville Power Administration (BPAT) | 1.5 TWh | Mar 1975 | Aug 2026 | 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 | Aug 2026 | Water |
| Ross | City of Seattle - (WA) | Rockport, WA | Seattle City Light (SCL) | 762.5 GWh | Nov 1952 | Aug 2026 | Water |
| Gorge | City of Seattle - (WA) | Rockport, WA | Seattle City Light (SCL) | 942.5 GWh | Aug 1924 | Aug 2026 | Water |
| Boundary | City of Seattle - (WA) | Metaline, WA | Seattle City Light (SCL) | 4.1 TWh | Jul 1967 | Aug 2026 | Water |
| River Road Gen Plant | PUD No 1 of Clark County - (WA) | Vancouver, WA | Bonneville Power Administration (BPAT) | 876.5 GWh | Nov 1997 | Aug 2026 | Natural Gas |
| Encogen | Puget Sound Energy Inc | Bellingham, WA | Puget Sound Energy, Inc. (PSEI) | 156.7 GWh | Feb 1993 | Aug 2026 | Natural Gas |
| Grays Harbor Energy Facility | Invenergy Services LLC | Elma, WA | Bonneville Power Administration (BPAT) | 1.7 TWh | Apr 2008 | Aug 2026 | Natural Gas |
| Spokane Waste to Energy | City of Spokane - (WA) | Spokane, WA | Avista Corporation (AVA) | 129.5 GWh | Aug 1991 | Aug 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) | 897.0 GWh | Aug 1991 | Aug 2026 | Natural Gas : 74.9% Other Gas : 25.1% |
| Ferndale Generating Station | Puget Sound Energy Inc | Ferndale, WA | Puget Sound Energy, Inc. (PSEI) | 444.4 GWh | Mar 1994 | Aug 2026 | Natural Gas |
| University of Washington Power Plant | University of Washington | Seattle, WA | Seattle City Light (SCL) | 125.4 MWh | Dec 1968 | Aug 2026 | Distillate Fuel Oil |
| Chehalis Generating Facility | PacifiCorp | Chehalis, WA | Bonneville Power Administration (BPAT) | 2.5 TWh | Jul 2003 | Aug 2026 | Natural Gas |
| Grimes Way | Washington State University | Pullman, WA | Avista Corporation (AVA) | 156.0 MWh | Dec 2004 | Aug 2026 | Natural Gas : 57.0% Distillate Fuel Oil : 43.0% |
| Hopkins Ridge Wind | Puget Sound Energy Inc | Dayton, WA | Bonneville Power Administration (BPAT) | 364.7 GWh | Oct 2005 | Aug 2026 | Wind |
| Wild Horse | Puget Sound Energy Inc | Ellensburg, WA | Puget Sound Energy, Inc. (PSEI) | 613.8 GWh | Nov 2006 | Aug 2026 | Wind : 99.9% |
| Big Horn Wind Project | Avangrid Power LLC | Bickelton, WA | Avangrid Renewables, LLC (AVRN) | 516.5 GWh | Sep 2006 | Aug 2026 | Wind |
| Lower Snake River Wind Energy Project | Puget Sound Energy Inc | Pomeroy, WA | Bonneville Power Administration (BPAT) | 789.4 GWh | Jan 2012 | Aug 2026 | Wind |
| Big Horn Wind II | Avangrid Power LLC | Bickleton, WA | Avangrid Renewables, LLC (AVRN) | 114.3 GWh | Dec 2010 | Aug 2026 | Wind |
| Juniper Canyon I Wind Project | Avangrid Power LLC | Bickleton, WA | Avangrid Renewables, LLC (AVRN) | 144.1 GWh | Feb 2011 | Aug 2026 | Wind |
| Adams Nielson Solar | Strata Manager, LLC | Lind, WA | Avista Corporation (AVA) | 38.2 GWh | Oct 2018 | Aug 2026 | Solar |
| Rattlesnake Flat | Rattlesnake Flat, LLC | Ritzville, WA | Avista Corporation (AVA) | 396.3 GWh | Nov 2020 | Aug 2026 | Wind |
| Skookumchuck Wind Facility | Southern Power Co | Rainier, WA | Puget Sound Energy, Inc. (PSEI) | 405.7 GWh | Oct 2020 | Aug 2026 | Wind |
| Lund Hill Solar | Avangrid Power LLC | Bickleton, WA | Avangrid Renewables, LLC (AVRN) | 368.7 GWh | Sep 2022 | Aug 2026 | Solar |
| Ostrea Solar, LLC | Cypress Creek Renewables | Moxee, WA | Bonneville Power Administration (BPAT) | 68.5 GWh | - | Aug 2026 | Solar |
| Goose Prairie Solar | Goose Prairie Solar LLC | Moxee, WA | Bonneville Power Administration (BPAT) | 182.2 GWh | Nov 2024 | Aug 2026 | Solar |
Browse Power Plants By Washington Counties
Figures are based on August 2026 generation numbers.| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Grant County, WA | # 1 | 10 | 29.9 TWh |
| Chelan County, WA | # 2 | 6 | 13.7 TWh |
| Douglas County, WA | # 3 | 1 | 11.9 TWh |
| Benton County, WA | # 4 | 7 | 10.1 TWh |
| Lewis County, WA | # 5 | 8 | 7.6 TWh |
| Klickitat County, WA | # 6 | 17 | 4.9 TWh |
| Pend Oreille County, WA | # 7 | 3 | 4.6 TWh |
| Whatcom County, WA | # 8 | 13 | 3.7 TWh |
| Cowlitz County, WA | # 9 | 6 | 3.6 TWh |
| Columbia County, WA | # 10 | 4 | 3.3 TWh |
| Walla Walla County, WA | # 11 | 4 | 3.3 TWh |
| Pierce County, WA | # 12 | 14 | 2.1 TWh |
| Grays Harbor County, WA | # 13 | 6 | 1.8 TWh |
| Whitman County, WA | # 14 | 6 | 1.8 TWh |
| Skagit County, WA | # 15 | 4 | 1.5 TWh |
| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Kittitas County, WA | # 16 | 9 | 1.2 TWh |
| Clark County, WA | # 17 | 2 | 876.5 GWh |
| Garfield County, WA | # 18 | 2 | 789.4 GWh |
| Lincoln County, WA | # 19 | 2 | 624.1 GWh |
| Spokane County, WA | # 20 | 7 | 557.4 GWh |
| Skamania County, WA | # 21 | 1 | 514.8 GWh |
| Adams County, WA | # 22 | 4 | 448.9 GWh |
| Thurston County, WA | # 23 | 4 | 439.7 GWh |
| King County, WA | # 24 | 12 | 392.2 GWh |
| Snohomish County, WA | # 25 | 9 | 359.3 GWh |
| Yakima County, WA | # 26 | 12 | 319.4 GWh |
| Stevens County, WA | # 27 | 4 | 302.8 GWh |
| Mason County, WA | # 28 | 3 | 273.6 GWh |
| Franklin County, WA | # 29 | 3 | 10.9 GWh |
| Jefferson County, WA | # 30 | 3 | 8.2 GWh |