Priest Rapids
Hydro power plant · Grant County, Washington
Nameplate capacity
950 MW
Rank in Washington
#7
of 139 plants
In service since
1959
October 1959
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- PUD No 2 of Grant County
- County
- Grant County
- Generating units
- 10
- Share of state capacity
- 3.00%
- Rank among hydro plants in Washington
- #6 of 73
- EIA plant code
- 3887
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 95 MW | 95 MW | 1961 | Operating |
| 10 | Conventional Hydroelectric | 95 MW | 95 MW | 1959 | Operating |
| 2 | Conventional Hydroelectric | 95 MW | 95 MW | 1961 | Operating |
| 3 | Conventional Hydroelectric | 95 MW | 95 MW | 1960 | Operating |
| 4 | Conventional Hydroelectric | 95 MW | 95 MW | 1960 | Operating |
| 5 | Conventional Hydroelectric | 95 MW | 95 MW | 1960 | Operating |
| 6 | Conventional Hydroelectric | 95 MW | 95 MW | 1960 | Operating |
| 7 | Conventional Hydroelectric | 95 MW | 95 MW | 1960 | Operating |
| 8 | Conventional Hydroelectric | 95 MW | 95 MW | 1959 | Operating |
| 9 | Conventional Hydroelectric | 95 MW | 95 MW | 1959 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Washington
| Columbia Generating Station | Nuclear | 1,200 MW |
| Boundary | Hydro | 1,160 MW |
| Wells | Hydro | 867 MW |
| Little Goose | Hydro | 810 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 950 MW solar plant and a 950 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Washington power plants · What Washington actually generates