Nameplate capacity
162 MW
Rank in Washington
#39
of 139 plants
In service since
1963
March 1963
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- City of Tacoma - (WA)
- County
- Lewis County
- Generating units
- 4
- Share of state capacity
- 0.51%
- Rank among hydro plants in Washington
- #18 of 73
- EIA plant code
- 3917
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 41 | Conventional Hydroelectric | 41 MW | 41 MW | 1983 | Operating |
| 42 | Conventional Hydroelectric | 41 MW | 41 MW | 1963 | Operating |
| 43 | Conventional Hydroelectric | 41 MW | 41 MW | 1963 | Operating |
| 44 | Conventional Hydroelectric | 41 MW | 41 MW | 1963 | 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
| Encogen | Natural gas | 176 MW |
| Whitehorn | Natural gas | 169 MW |
| Hopkins Ridge Wind | Wind | 157 MW |
| Juniper Canyon I Wind Project | Wind | 151 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 162 MW solar plant and a 162 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