Lake Mendocino
Mendocino County, California · EIA plant ID 7489 · Operator: City of Ukiah - (CA)
Nameplate4MWSummer 4 MW
Generators2in service
Net generation12GWh12 mo to Dec 2025
Capacity factor40%hydro units, summer MW
Heat rate—thermal plants only
First online1987
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 | 0 | 0.0% | — |
| 2003 | 0 | 0.0% | — |
| 2004 | 0 | 0.0% | — |
| 2005 | 0 | 0.0% | — |
| 2007 | 3.3 | 10.7% | — |
| 2008 | 8.7 | 28.4% | — |
| 2009 | 5.3 | 17.3% | — |
| 2010 | 13.6 | 44.5% | — |
| 2011 | 10.2 | 33.3% | — |
| 2012 | 1.6 | 5.2% | — |
| 2013 | 6.3 | 20.5% | — |
| 2014 | 2.7 | 8.8% | — |
| 2015 | 3.5 | 11.6% | — |
| 2016 | 8 | 26.0% | — |
| 2017 | 10.3 | 33.5% | — |
| 2018 | 5.9 | 19.3% | — |
| 2019 | 13.8 | 45.0% | — |
| 2020 | 7.1 | 23.1% | — |
| 2021 | 1.7 | 5.7% | — |
| 2022 | 2.4 | 7.7% | — |
| 2023 | 11.1 | 36.1% | — |
| 2024 | 12.3 | 40.1% | — |
| 2025 | 12.3 | 40.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| G1 | Conventional Hydroelectric | HY | 1 | 1 | May 1987 | Operating | — | coming soon |
| G2 | Conventional Hydroelectric | HY | 2.5 | 2.5 | May 1987 | Operating | — | coming soon |
Owner / operator
Operator: City of Ukiah - (CA). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of Ukiah - (CA) | 100.0% | 4 MW |
Nearby plants
Within 80 km.
| Redemeyer Road Solar | 8 MW | 1.7 km |
| East Road Storage Project | — | 5.9 km |
| Potter Valley | 9 MW | 19 km |
| Kama 1 LLC | 2 MW | 24 km |
| Aidlin Geothermal Power Plant | 25 MW | 48.2 km |
| Cloverdale Solar I | 2 MW | 49.3 km |