Washington has 142 power plants in the EIA (Energy Information Administration) database, with a combined installed capacity of 30,975 MW. Renewables (solar, wind, hydro, geothermal, biomass) account for 83% of plants in the state. The largest single facility is Grand Coulee, a Hydroelectric plant with 7,079 MW of capacity.
Use the interactive Washington power plants map below to explore every generating facility, color-coded by fuel type. Click any plant for its name, utility operator, capacity, technology, and location — or view the full US Power Plants Interactive Map to compare Washington to every other state.
Washington Power Plants by the Numbers
- 142 total power plants in Washington (EIA (Energy Information Administration))
- 30,975 MW total installed generating capacity
- 83% of plants use renewable energy sources
- Dominant fuel type: Hydroelectric
Washington Power Plants by Fuel Type
- Hydroelectric: 75 plants (21,827 MW capacity)
- Wind: 23 plants (3,375 MW capacity)
- Natural Gas: 16 plants (3,378 MW capacity)
- Biomass: 13 plants (282 MW capacity)
- Solar: 7 plants (268 MW capacity)
- Batteries: 3 plants (6 MW capacity)
- Petroleum: 3 plants (18 MW capacity)
- Coal: 1 plants (670 MW capacity)
- Nuclear: 1 plants (1,151 MW capacity)
The 15 Largest Power Plants in Washington
The largest power plant in Washington by installed capacity is Grand Coulee at 7,079 MW. The 15 largest Washington power plants from the EIA (Energy Information Administration):
| # | Plant Name | Utility | Capacity | Fuel Type | Location |
|---|---|---|---|---|---|
| 1 | Grand Coulee | U S Bureau of Reclamation | 7,079 MW | Hydroelectric | Grand Coulee, Grant |
| 2 | Chief Joseph | USACE Northwestern Division | 2,456 MW | Hydroelectric | Bridgeport, Douglas |
| 3 | Rocky Reach | PUD No 1 of Chelan County | 1,254 MW | Hydroelectric | Wenatchee, Chelan |
| 4 | Wanapum | PUD No 2 of Grant County | 1,220 MW | Hydroelectric | Beverly, Grant |
| 5 | Columbia Generating Station | Energy Northwest | 1,151 MW | Nuclear | Richland, Benton |
| 6 | Boundary | City of Seattle – (WA) | 1,145 MW | Hydroelectric | Metaline, Pend Oreille |
| 7 | Priest Rapids | PUD No 2 of Grant County | 950 MW | Hydroelectric | Mattawa, Grant |
| 8 | Wells | PUD No 1 of Douglas County | 875 MW | Hydroelectric | Pateros, Douglas |
| 9 | Little Goose | USACE Northwestern Division | 810 MW | Hydroelectric | Dayton, Columbia |
| 10 | Lower Monumental | USACE Northwestern Division | 810 MW | Hydroelectric | Kahlotus, Walla Walla |
| 11 | Lower Granite | USACE Northwestern Division | 802 MW | Hydroelectric | Pomeroy, Whitman |
| 12 | Transalta Centralia Generation | TransAlta Centralia Gen LLC | 670 MW | Coal | Centralia, Lewis |
| 13 | Grays Harbor Energy Facility | Invenergy Services LLC | 595 MW | Natural Gas | Elma, Grays Harbor |
| 14 | Ice Harbor | USACE Northwestern Division | 513 MW | Hydroelectric | Burbank, Walla Walla |
| 15 | Rock Island | PUD No 1 of Chelan County | 503 MW | Hydroelectric | Wenatchee, Chelan |
Energy Regulation in Washington
Power generation in Washington is overseen by the Washington Utilities and Transportation Commission, in coordination with the Federal Energy Regulatory Commission (FERC) and the North American Electric Reliability Corporation (NERC). All generating facilities above 1 MW are required to report to the EIA, which maintains the official database used in this map.
Frequently Asked Questions
How many power plants are in Washington?
Washington has 142 power plants according to the EIA (Energy Information Administration). The dominant fuel type is Hydroelectric, and total installed capacity is 30,975 MW.
What is the largest power plant in Washington?
The largest power plant in Washington is Grand Coulee, a Hydroelectric facility with 7,079 MW of generating capacity.
What percentage of Washington power plants use renewable energy?
83% of power plants in Washington use renewable energy sources (solar, wind, hydroelectric, geothermal, or biomass).
Who regulates power plants in Washington?
Power generation in Washington is regulated by the Washington Utilities and Transportation Commission at the state level, with federal oversight from FERC and NERC.
