Swan Lake
Ketchikan Gateway County, Alaska · EIA plant ID 70 · Operator: Southeast Alaska Power Agency
Nameplate23MWSummer 23 MW
Generators2in service
Net generation78GWh12 mo to Dec 2025
Capacity factor39%hydro units, summer MW
Heat rate—thermal plants only
First online1984
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 | 82.9 | 42.2% | — |
| 2002 | 75.1 | 38.3% | — |
| 2003 | 80.8 | 41.2% | — |
| 2004 | 82.5 | 41.9% | — |
| 2005 | 74.7 | 38.1% | — |
| 2006 | 80.2 | 40.8% | — |
| 2007 | 81.2 | 41.4% | — |
| 2008 | 67.2 | 34.2% | — |
| 2009 | 76.5 | 39.0% | — |
| 2010 | 92 | 46.9% | — |
| 2011 | 90.5 | 46.1% | — |
| 2012 | 96.7 | 49.1% | — |
| 2013 | 69.2 | 35.2% | — |
| 2014 | 66.2 | 33.7% | — |
| 2015 | 61.1 | 31.1% | — |
| 2016 | 71.2 | 35.9% | — |
| 2017 | 70.5 | 35.6% | — |
| 2018 | 58.4 | 29.5% | — |
| 2019 | 54.4 | 27.5% | — |
| 2020 | 72.6 | 36.6% | — |
| 2021 | 81.1 | 41.0% | — |
| 2022 | 75.8 | 38.3% | — |
| 2023 | 70.6 | 35.7% | — |
| 2024 | 75.5 | 38.0% | — |
| 2025 | 77.6 | 39.2% | — |
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 | 11.3 | 11.3 | Jun 1984 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 11.3 | 11.3 | Jun 1984 | Operating | — | coming soon |
Owner / operator
Operator: Southeast Alaska Power Agency. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Southeast Alaska Power Agency | 100.0% | 23 MW |
Nearby plants
Within 80 km.
| Mahoney Lake Hydroelectric | — | 24.6 km |
| Beaver Falls | 5 MW | 27.2 km |
| Silvis | 2 MW | 27.9 km |
| Whitman | 5 MW | 33.8 km |
| Ketchikan | 4 MW | 34.8 km |
| S W Bailey | 26 MW | 35.8 km |