4th largest plant in Washington · 231st nationally
Wanapum is a hydroelectric power plant in Washington with a nameplate capacity of 1,220 MW. It generates roughly 4.1M MWh per year — enough to power about 389,129 average U.S. homes.
Its capacity factor of 38% reflects intermittent or peaking operation.
| Plant Name | Wanapum |
|---|---|
| Operator | Pud No 2 Of Grant County |
| City | Beverly |
| County | Grant County |
| State | Washington |
| ZIP | 99321 |
| Coordinates | 46.87310, -119.97030 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 10A | Conventional Hydroelectric | Water | 122 MW | Operating | 2014 |
| 1A | Conventional Hydroelectric | Water | 122 MW | Operating | 2013 |
| 2A | Conventional Hydroelectric | Water | 122 MW | Operating | 2012 |
| 3A | Conventional Hydroelectric | Water | 122 MW | Operating | 2017 |
| 4A | Conventional Hydroelectric | Water | 122 MW | Operating | 2020 |
| 5A | Conventional Hydroelectric | Water | 122 MW | Operating | 2012 |
| 6A | Conventional Hydroelectric | Water | 122 MW | Operating | 2016 |
| 7A | Conventional Hydroelectric | Water | 122 MW | Operating | 2011 |
| 8A | Conventional Hydroelectric | Water | 122 MW | Operating | 2018 |
| 9A | Conventional Hydroelectric | Water | 122 MW | Operating | 2015 |
| 1 | Conventional Hydroelectric | Water | 104 MW | Retired | 1963 |
| 10 | Conventional Hydroelectric | Water | 104 MW | Retired | 1963 |
| 2 | Conventional Hydroelectric | Water | 104 MW | Retired | 1963 |
| 3 | Conventional Hydroelectric | Water | 104 MW | Retired | 1963 |
| 4 | Conventional Hydroelectric | Water | 104 MW | Retired | 1963 |
| 5 | Conventional Hydroelectric | Water | 104 MW | Retired | 1963 |
| 6 | Conventional Hydroelectric | Water | 104 MW | Retired | 1963 |
| 7 | Conventional Hydroelectric | Water | 104 MW | Retired | 1963 |
| 8 | Conventional Hydroelectric | Water | 104 MW | Retired | 1963 |
| 9 | Conventional Hydroelectric | Water | 104 MW | Retired | 1964 |
| NERC Region | WECC |
|---|---|
| Balancing Authority | Public Utility District No. 2 Of Grant County, Washington |
Hydroelectric plants spin turbines using falling or flowing water — typically from a dam-impounded reservoir. They are dispatchable, long-lived, and emission-free at the point of generation, though large reservoirs can disrupt rivers and ecosystems and methane can be released from flooded vegetation.