Cooper Lake
Kenai Peninsula County, Alaska · EIA plant ID 6291 · Operator: Chugach Electric Assn Inc
Nameplate19MWSummer 19 MW
Generators2in service
Net generation53GWh12 mo to Dec 2025
Capacity factor31%hydro units, summer MW
Heat rate—thermal plants only
First online1961
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) |
|---|---|---|---|
| 2001 | 59.4 | 32.6% | — |
| 2002 | 65.6 | 39.0% | — |
| 2003 | 47.7 | 28.3% | — |
| 2004 | 48.4 | 28.7% | — |
| 2005 | 34 | 20.2% | — |
| 2006 | 30.1 | 17.9% | — |
| 2007 | 24.3 | 14.4% | — |
| 2008 | 6.7 | 4.0% | — |
| 2009 | 33.3 | 19.8% | — |
| 2010 | 45.4 | 26.7% | — |
| 2011 | 28.8 | 16.9% | — |
| 2012 | 77.6 | 45.5% | — |
| 2013 | 35.9 | 21.1% | — |
| 2014 | 32.1 | 18.9% | — |
| 2015 | 16.4 | 9.7% | — |
| 2016 | 86.7 | 50.9% | — |
| 2017 | 25.7 | 15.1% | — |
| 2018 | 59.8 | 35.2% | — |
| 2019 | 46.1 | 27.1% | — |
| 2020 | 60.9 | 35.7% | — |
| 2021 | 36.4 | 21.4% | — |
| 2022 | 34.1 | 20.0% | — |
| 2023 | 46.4 | 27.3% | — |
| 2024 | 38.1 | 22.4% | — |
| 2025 | 52.5 | 30.9% | — |
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 | 9.7 | 9.7 | May 1961 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 9.7 | 9.7 | May 1961 | Operating | — | coming soon |
Owner / operator
Operator: Chugach Electric Assn Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Chugach Electric Assn Inc | 100.0% | 19 MW |
Nearby plants
Within 80 km.
| Seward (AK) | 16 MW | 31.7 km |
| Soldotna | 97 MW | 74 km |