Nameplate capacity
23 MW
Rank in Washington
#86
of 139 plants
In service since
1929
April 1929
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Electron Hydro LLC
- County
- Pierce County
- Generating units
- 4
- Share of state capacity
- 0.07%
- Rank among hydro plants in Washington
- #41 of 73
- EIA plant code
- 3854
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 4 | Conventional Hydroelectric | 7.5 MW | 7.9 MW | 1929 | Operating |
| 1 | Conventional Hydroelectric | 5.1 MW | 5.7 MW | 2004 | Operating |
| 2 | Conventional Hydroelectric | 5.1 MW | 5.9 MW | 2004 | Operating |
| 3 | Conventional Hydroelectric | 5.1 MW | 6.3 MW | 2004 | 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
| Boulder Park | Natural gas | 25 MW |
| Twin Falls Hydro | Hydro | 24 MW |
| Adams Nielson Solar | Solar | 19 MW |
| Sierra Pacific Aberdeen | Other | 18 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 23 MW solar plant and a 23 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