Green Lake
Sitka County, Alaska · EIA plant ID 313 · Operator: City & Borough of Sitka - (AK)
Nameplate19MWSummer 19 MW
Generators2in service
Net generation38GWh12 mo to Dec 2025
Capacity factor24%hydro units, summer MW
Heat rate—thermal plants only
First online1982
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 | 44.9 | 27.6% | — |
| 2002 | 0.1 | 0.0% | — |
| 2003 | 52.1 | 32.0% | — |
| 2004 | 43.8 | 26.8% | — |
| 2005 | 52.6 | 32.3% | — |
| 2006 | 56.2 | 34.5% | — |
| 2007 | 59.7 | 36.6% | — |
| 2008 | 61.1 | 37.4% | — |
| 2009 | 58.1 | 35.7% | — |
| 2010 | 58.1 | 35.7% | — |
| 2011 | 59 | 36.2% | — |
| 2012 | 58 | 35.5% | — |
| 2013 | 60.8 | 37.3% | — |
| 2014 | 70.8 | 43.5% | — |
| 2015 | 49.5 | 30.4% | — |
| 2016 | 36 | 22.0% | — |
| 2017 | 54.6 | 33.5% | — |
| 2018 | 52.3 | 32.1% | — |
| 2019 | 51.1 | 31.4% | — |
| 2021 | 41.6 | 25.5% | — |
| 2022 | 48 | 29.5% | — |
| 2023 | 41.8 | 25.6% | — |
| 2024 | 43.2 | 26.5% | — |
| 2025 | 38.5 | 23.6% | — |
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 | 9.3 | 9.3 | Apr 1982 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 9.3 | 9.3 | Oct 1982 | Operating | — | coming soon |
Owner / operator
Operator: City & Borough of Sitka - (AK). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City & Borough of Sitka - (AK) | 100.0% | 19 MW |
Nearby plants
Within 80 km.
| Blue Lake Hydro | 16 MW | 9.7 km |
| Jarvis Street | 26 MW | 13.5 km |
| Angoon | 2 MW | 65.5 km |