Tyee Lake Hydroelectric Facility
Hydro power plant · Wrangell Petersburg County, Alaska
Nameplate capacity
23 MW
Rank in Alaska
#30
of 150 plants
In service since
1983
July 1983
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Southeast Alaska Power Agency
- County
- Wrangell Petersburg County
- Generating units
- 2
- Share of state capacity
- 0.73%
- Rank among hydro plants in Alaska
- #6 of 30
- EIA plant code
- 61166
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| UNIT1 | Conventional Hydroelectric | 11 MW | 11 MW | 1983 | Operating |
| UNIT2 | Conventional Hydroelectric | 11 MW | 11 MW | 1983 | 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 Alaska
| Delta Power | Other | 23 MW |
| Swan Lake | Hydro | 23 MW |
| Dutch Harbor | Other | 22 MW |
| FWA Central Heat and Power Plant | Coal | 20 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 Alaska power plants · What Alaska actually generates