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) | 396.3 GWh | Nov 2020 | Aug 2026 | Wind |
| Roza | U S Bureau of Reclamation | Yakima, WA | Bonneville Power Administration (BPAT) | 38.2 GWh | Jul 1958 | Dec 2025 | 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 |
| Rocky Brook Hydroelectric | Rocky Brook Electric Inc | Brinnon, WA | Bonneville Power Administration (BPAT) | 464.0 MWh | Nov 1985 | May 2025 | Water |
| Russell D Smith | Columbia Basin Hydropower | Othello, WA | Bonneville Power Administration (BPAT) | 14.4 GWh | Aug 1982 | Oct 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 | 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 |
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 |