Rocky Reach
Hydro power plant · Chelan County, Washington
Nameplate capacity
1,349 MW
Rank in Washington
#3
of 139 plants
In service since
1961
June 1961
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- PUD No 1 of Chelan County
- County
- Chelan County
- Generating units
- 11
- Share of state capacity
- 4.25%
- Rank among hydro plants in Washington
- #3 of 73
- EIA plant code
- 3883
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| C-10 | Conventional Hydroelectric | 138 MW | 130 MW | 1974 | Operating |
| C-11 | Conventional Hydroelectric | 138 MW | 130 MW | 1974 | Operating |
| C-8 | Conventional Hydroelectric | 138 MW | 130 MW | 1973 | Operating |
| C-9 | Conventional Hydroelectric | 138 MW | 130 MW | 1973 | Operating |
| C-1 | Conventional Hydroelectric | 114 MW | 105 MW | 1961 | Operating |
| C-2 | Conventional Hydroelectric | 114 MW | 105 MW | 1961 | Operating |
| C-3 | Conventional Hydroelectric | 114 MW | 105 MW | 1961 | Operating |
| C-4 | Conventional Hydroelectric | 114 MW | 105 MW | 1961 | Operating |
| C-5 | Conventional Hydroelectric | 114 MW | 105 MW | 1961 | Operating |
| C-6 | Conventional Hydroelectric | 114 MW | 105 MW | 1961 | Operating |
| C-7 | Conventional Hydroelectric | 114 MW | 105 MW | 1961 | 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
| Grand Coulee | Hydro | 6,809 MW |
| Chief Joseph | Hydro | 2,456 MW |
| Wanapum | Hydro | 1,220 MW |
| Columbia Generating Station | Nuclear | 1,200 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 1,349 MW solar plant and a 1,349 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