Nameplate capacity
867 MW
Rank in Washington
#8
of 139 plants
In service since
1967
September 1967
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- PUD No 1 of Douglas County
- County
- Chelan County
- Generating units
- 10
- Share of state capacity
- 2.73%
- Rank among hydro plants in Washington
- #7 of 73
- EIA plant code
- 3886
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| U-10 | Conventional Hydroelectric | 89 MW | 89 MW | 1969 | Operating |
| U-2 | Conventional Hydroelectric | 89 MW | 89 MW | 1967 | Operating |
| U-3 | Conventional Hydroelectric | 89 MW | 89 MW | 1967 | Operating |
| U-4 | Conventional Hydroelectric | 89 MW | 89 MW | 1967 | Operating |
| U-5 | Conventional Hydroelectric | 89 MW | 89 MW | 1967 | Operating |
| U-6 | Conventional Hydroelectric | 89 MW | 89 MW | 1967 | Operating |
| U-7 | Conventional Hydroelectric | 89 MW | 89 MW | 1967 | Operating |
| U-8 | Conventional Hydroelectric | 89 MW | 89 MW | 1968 | Operating |
| U-1 | Conventional Hydroelectric | 77 MW | 84 MW | 1967 | Operating |
| U-9 | Conventional Hydroelectric | 77 MW | 84 MW | 1969 | Out of service and NOT expected to return to service in next calendar year |
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
| Boundary | Hydro | 1,160 MW |
| Priest Rapids | Hydro | 950 MW |
| Little Goose | Hydro | 810 MW |
| Lower Granite | 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 867 MW solar plant and a 867 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