Nameplate capacity
136 MW
Rank in Washington
#46
of 139 plants
In service since
1931
July 1931
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- PacifiCorp
- County
- Cowlitz County
- Generating units
- 4
- Share of state capacity
- 0.43%
- Rank among hydro plants in Washington
- #19 of 73
- EIA plant code
- 3847
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 45 MW | 50 MW | 1932 | Operating |
| 2 | Conventional Hydroelectric | 45 MW | 50 MW | 1949 | Operating |
| 3 | Conventional Hydroelectric | 45 MW | 50 MW | 1958 | Operating |
| House | Conventional Hydroelectric | 1.0 MW | 1.0 MW | 1931 | 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
| HF Sinclair Puget Sound Refining | Natural gas | 140 MW |
| Washington Wind | Wind | 136 MW |
| Skookumchuck Wind Facility | Wind | 136 MW |
| Yale | Hydro | 134 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 136 MW solar plant and a 136 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