Purple Lake
Prince of Wales-Hyder County, Alaska · EIA plant ID 6302 · Operator: Metlakatla Power & Light
Nameplate4MWSummer 4 MW
Generators3in service
Net generation14GWh12 mo to Dec 2025
Capacity factor41%hydro units, summer MW
Heat rate—thermal plants only
First online1956
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2002 | 13 | 38.1% | — |
| 2003 | 11.2 | 32.7% | — |
| 2004 | 10.7 | 31.1% | — |
| 2005 | 10.8 | 31.5% | — |
| 2006 | 13.1 | 38.2% | — |
| 2007 | 13.2 | 38.6% | — |
| 2008 | 13.6 | 39.6% | — |
| 2009 | 14.3 | 41.8% | — |
| 2010 | 16.2 | 47.5% | — |
| 2011 | 15 | 44.0% | — |
| 2012 | 16.2 | 47.2% | — |
| 2013 | 16.2 | 47.4% | — |
| 2014 | 15.7 | 45.8% | — |
| 2015 | 14.7 | 43.1% | — |
| 2016 | 14.3 | 41.7% | — |
| 2017 | 16.9 | 49.6% | — |
| 2018 | 8.2 | 23.9% | — |
| 2019 | 9.1 | 26.7% | — |
| 2020 | 11.2 | 32.6% | — |
| 2021 | 14 | 40.8% | — |
| 2022 | 14.1 | 41.3% | — |
| 2023 | 12.5 | 36.5% | — |
| 2024 | 12.3 | 35.8% | — |
| 2025 | 13.9 | 40.7% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 1.3 | 1.3 | Jan 1956 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 1.3 | 1.3 | Jan 1956 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 1.3 | 1.3 | Dec 1962 | Operating | — | coming soon |
Owner / operator
Operator: Metlakatla Power & Light. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Metlakatla Power & Light | 100.0% | 4 MW |
Nearby plants
Within 80 km.
| Chester Lake | 1 MW | 2.8 km |
| Centennial | 2 MW | 3.5 km |
| Whitman | 5 MW | 26.3 km |
| Ketchikan | 4 MW | 28.7 km |
| S W Bailey | 26 MW | 31.1 km |
| Silvis | 2 MW | 32.3 km |