Nameplate capacity
50 MW
Rank in Washington
#72
of 139 plants
In service since
2026
June 2026
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- City of Tacoma - (WA)
- County
- Mason County
- Generating units
- 2
- Share of state capacity
- 0.16%
- Rank among hydro plants in Washington
- #33 of 73
- EIA plant code
- 3914
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 21 | Conventional Hydroelectric | 25 MW | 27 MW | 2026 | Operating |
| 22 | Conventional Hydroelectric | 25 MW | 27 MW | 2026 | 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
| Kettle Falls Generating Station | Other | 58 MW |
| Alder | Hydro | 51 MW |
| Big Horn Wind II | Wind | 50 MW |
| Linden Wind Energy Project | Wind | 50 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 50 MW solar plant and a 50 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