Purple Lake
Hydro power plant in Prince of Wales Ketchikan, Alaska. 3.9 MW of nameplate capacity across 3 generators, operated by Metlakatla Power & Light.
Also known as Purple Lake Hydro Power Plant · EIA plant 6302
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 3.9 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- January 1956First generator online
- Operator
- Metlakatla Power & LightEIA operator ID 12385
- Grid
- Not reported
- Price nodes
- None linkedNo verified ISO node
- Location
- Prince of Wales Ketchikan, AK55.0913, −131.5450
- EIA plant ID
- 6302EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Purple Lake produces
Free · EIA-923Net generation, 2025
13.9 GWh
13,899 MWh, final
Capacity factor, 2025
40.7%
2024: 35.8%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
8.2–16.9
GWh a year. Low 2018, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 0 | Not reported | 12 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | 13,007 | Not reported | 12 of 12 |
| 2003 | 11,171 | Not reported | 12 of 12 |
| 2004 | 10,664 | Not reported | 12 of 12 |
| 2005 | 10,773 | Not reported | 12 of 12 |
| 2006 | 13,063 | Not reported | 12 of 12 |
| 2007 | 13,192 | Not reported | 12 of 12 |
| 2008 | 13,583 | Not reported | 12 of 12 |
| 2009 | 14,282 | Not reported | 12 of 12 |
| 2010 | 16,239 | 47.5% | 12 of 12 |
| 2011 | 15,040 | 44.0% | 12 of 12 |
| 2012 | 16,157 | 47.2% | 12 of 12 |
| 2013 | 16,198 | 47.4% | 12 of 12 |
| 2014 | 15,660 | 45.8% | 12 of 12 |
| 2015 | 14,712 | 43.1% | 12 of 12 |
| 2016 | 14,286 | 41.7% | 12 of 12 |
| 2017 | 16,932 | 49.6% | 12 of 12 |
| 2018 | 8,157 | 23.9% | 12 of 12 |
| 2019 | 9,111 | 26.7% | 12 of 12 |
| 2020 | 11,178 | 32.6% | 12 of 12 |
| 2021 | 13,956 | 40.9% | 12 of 12 |
| 2022 | 14,102 | 41.3% | 12 of 12 |
| 2023 | 12,485 | 36.5% | 12 of 12 |
| 2024 | 12,254 | 35.8% | 12 of 12 |
| 2025 | 13,899 | 40.7% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 1.3 | January 1956 |
| 2 | Conventional Hydroelectric | 1.3 | January 1956 |
| 3 | Conventional Hydroelectric | 1.3 | December 1962 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Metlakatla Power & Light as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Purple Lake
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Questions about Purple Lake
How much power does Purple Lake produce?
Purple Lake reported 13,899 MWh (13.9 GWh) of net generation in 2025, a 40.7% capacity factor on 3.9 MW of nameplate capacity.
Where is Purple Lake?
Purple Lake is in Prince of Wales Ketchikan, Alaska, at 55.0913, −131.5450.
Who operates Purple Lake?
EIA-860M for August 2026 lists Metlakatla Power & Light as the operator (EIA operator ID 12385). The operator is not always the owner.
When did Purple Lake start operating?
Its first generator began operating in January 1956, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page