Nameplate capacity
28 MW
Rank in Washington
#81
of 139 plants
In service since
1964
April 1964
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Energy Northwest - Packwood
- County
- Lewis County
- Generating units
- 1
- Share of state capacity
- 0.09%
- Rank among hydro plants in Washington
- #38 of 73
- EIA plant code
- 3929
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 28 MW | 26 MW | 1964 | 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
| Cedar Falls (WA) | Hydro | 30 MW |
| Sierra Pacific Burlington Facility | Other | 28 MW |
| Main Canal Headworks | Hydro | 27 MW |
| Spokane Waste to Energy | Other | 26 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 28 MW solar plant and a 28 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