Directory of Power Plants in Washington
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Rattlesnake Flat | Rattlesnake Flat, LLC | Ritzville, WA | Avista Corporation (AVA) | 399.6 GWh | Nov 2020 | Sep 2025 | Wind |
| Roza | U S Bureau of Reclamation | Yakima, WA | Bonneville Power Administration (BPAT) | 47.7 GWh | Jul 1958 | Dec 2024 | Water |
| River Road Gen Plant | PUD No 1 of Clark County - (WA) | Vancouver, WA | Bonneville Power Administration (BPAT) | 1.5 TWh | Nov 1997 | Sep 2025 | Natural Gas |
| Rocky Brook Hydroelectric | Rocky Brook Electric Inc | Brinnon, WA | Bonneville Power Administration (BPAT) | 540.0 MWh | Nov 1985 | Dec 2024 | Water |
| Russell D Smith | Columbia Basin Hydropower | Othello, WA | Bonneville Power Administration (BPAT) | 13.4 GWh | Aug 1982 | Sep 2024 | Water |
| Rocky Reach | PUD No 1 of Chelan County | Wenatchee, WA | Public Utility District No. 1 of Chelan County (CHPD) | 5.1 TWh | May 1961 | Sep 2025 | Water |
| Rock Island | PUD No 1 of Chelan County | Wenatchee, WA | Public Utility District No. 1 of Chelan County (CHPD) | 2.2 TWh | Sep 1931 | Sep 2025 | Water |
| Ross | City of Seattle - (WA) | Rockport, WA | Seattle City Light (SCL) | 400.9 GWh | Nov 1952 | Jul 2025 | Water |
Browse Power Plants By Washington Counties
Figures are based on September 2025 generation numbers.| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Grant County, WA | # 1 | 9 | 25.0 TWh |
| Chelan County, WA | # 2 | 6 | 11.2 TWh |
| Douglas County, WA | # 3 | 1 | 9.6 TWh |
| Benton County, WA | # 4 | 7 | 8.0 TWh |
| Lewis County, WA | # 5 | 8 | 7.5 TWh |
| Klickitat County, WA | # 6 | 16 | 5.5 TWh |
| Whatcom County, WA | # 7 | 13 | 5.1 TWh |
| Cowlitz County, WA | # 8 | 6 | 3.8 TWh |
| Grays Harbor County, WA | # 9 | 6 | 3.6 TWh |
| Columbia County, WA | # 10 | 4 | 3.3 TWh |
| Pend Oreille County, WA | # 11 | 3 | 3.2 TWh |
| Walla Walla County, WA | # 12 | 4 | 3.2 TWh |
| Pierce County, WA | # 13 | 14 | 2.3 TWh |
| Whitman County, WA | # 14 | 6 | 1.7 TWh |
| Skagit County, WA | # 15 | 4 | 1.7 TWh |
| Clark County, WA | # 16 | 2 | 1.5 TWh |
| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Kittitas County, WA | # 17 | 9 | 1.2 TWh |
| Garfield County, WA | # 18 | 2 | 785.6 GWh |
| Lincoln County, WA | # 19 | 2 | 641.5 GWh |
| Spokane County, WA | # 20 | 7 | 558.6 GWh |
| Skamania County, WA | # 21 | 1 | 459.1 GWh |
| Adams County, WA | # 22 | 4 | 457.6 GWh |
| Thurston County, WA | # 23 | 4 | 427.5 GWh |
| Snohomish County, WA | # 24 | 9 | 401.9 GWh |
| King County, WA | # 25 | 12 | 365.2 GWh |
| Stevens County, WA | # 26 | 4 | 346.7 GWh |
| Mason County, WA | # 27 | 3 | 304.6 GWh |
| Yakima County, WA | # 28 | 12 | 234.0 GWh |
| Clallam County, WA | # 29 | 3 | 37.5 GWh |
| Franklin County, WA | # 30 | 3 | 12.8 GWh |
| Jefferson County, WA | # 31 | 3 | 3.2 GWh |