Purple Lake
Hydro power plant · Prince of Wales Ketchikan County, Alaska
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Metlakatla Power & Light
- County
- Prince of Wales Ketchikan County
- Generating units
- 3
- Share of state capacity
- 0.13%
- Rank among hydro plants in Alaska
- #22 of 30
- EIA plant code
- 6302
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 1.3 MW | 1.3 MW | 1956 | Operating |
| 2 | Conventional Hydroelectric | 1.3 MW | 1.3 MW | 1956 | Operating |
| 3 | Conventional Hydroelectric | 1.3 MW | 1.3 MW | 1962 | 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
| Goat Lake Hydro | Hydro | 4.0 MW |
| King Cove | Other | 3.9 MW |
| False Island | Other | 3.8 MW |
| Yakutat | Other | 3.8 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 3.9 MW solar plant and a 3.9 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