Union Valley
El Dorado County, California · EIA plant ID 6612 · Operator: Sacramento Municipal Util Dist
Nameplate39MWSummer 39 MW
Generators1in service
Net generation89GWh12 mo to Dec 2025
Capacity factor26%hydro units, summer MW
Heat rate—thermal plants only
First online1963
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 | 19 | 4.6% | — |
| 2002 | 97.4 | 23.8% | — |
| 2003 | 114.7 | 28.0% | — |
| 2004 | 92.6 | 22.6% | — |
| 2005 | 155.5 | 38.0% | — |
| 2006 | 22.2 | 5.4% | — |
| 2007 | 76.3 | 22.6% | — |
| 2008 | 61.8 | 18.2% | — |
| 2009 | 98.3 | 29.1% | — |
| 2010 | 127.6 | 37.7% | — |
| 2011 | 207.5 | 61.4% | — |
| 2012 | 102.9 | 30.3% | — |
| 2013 | 80.5 | 23.8% | — |
| 2014 | 58.8 | 17.4% | — |
| 2015 | 38.9 | 11.5% | — |
| 2016 | 109.8 | 32.4% | — |
| 2017 | 186.3 | 55.1% | — |
| 2018 | 88.4 | 26.2% | — |
| 2019 | 127.7 | 37.8% | — |
| 2020 | 49.8 | 14.7% | — |
| 2021 | 32.7 | 9.7% | — |
| 2022 | 69.7 | 20.6% | — |
| 2023 | 168.2 | 49.7% | — |
| 2024 | 76.5 | 22.6% | — |
| 2025 | 89.1 | 26.4% | — |
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 | 38.6 | 38.6 | Oct 1963 | Operating | — | coming soon |
Owner / operator
Operator: Sacramento Municipal Util Dist. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Sacramento Municipal Util Dist | 100.0% | 39 MW |
Nearby plants
Within 80 km.
| Jones Fork | 10 MW | 5.6 km |
| Robbs Peak | 26 MW | 6.7 km |
| Jaybird | 162 MW | 8.3 km |
| Camino | 158 MW | 8.9 km |
| Loon Lake | 74 MW | 16.8 km |
| El Dorado | 20 MW | 17.1 km |