Union Valley
Hydro power plant in El Dorado County, California. 38.6 MW of nameplate capacity across 1 generator, operated by Sacramento Municipal Util Dist.
Also known as Union Valley Powerhouse · EIA plant 6612
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Key facts
- Capacity
- 38.6 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- October 1963First generator online
- Operator
- Sacramento Municipal Util DistEIA operator ID 16534
- Grid
- BANCBalancing authority BANC
- Price nodes
- None linkedNo verified ISO node
- Location
- El Dorado County, CA38.8643, −120.4443
- EIA plant ID
- 6612EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Union Valley produces
Free · EIA-923Net generation, 2025
89.1 GWh
89,140 MWh, final
Capacity factor, 2025
26.4%
2024: 22.5%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
32.7–186.3
GWh a year. Low 2021, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 139,504 | Not reported | 12 of 12 |
| 2001 | 18,992 | Not reported | 12 of 12 |
| 2002 | 97,398 | Not reported | 12 of 12 |
| 2003 | 114,682 | Not reported | 12 of 12 |
| 2004 | 92,623 | Not reported | 12 of 12 |
| 2005 | 155,533 | Not reported | 12 of 12 |
| 2006 | 22,150 | Not reported | 12 of 12 |
| 2007 | 76,311 | Not reported | 12 of 12 |
| 2008 | 61,754 | Not reported | 12 of 12 |
| 2009 | 98,336 | Not reported | 12 of 12 |
| 2010 | 127,564 | 37.7% | 12 of 12 |
| 2011 | 207,529 | 61.4% | 12 of 12 |
| 2012 | 102,861 | 30.3% | 12 of 12 |
| 2013 | 80,505 | 23.8% | 12 of 12 |
| 2014 | 58,757 | 17.4% | 12 of 12 |
| 2015 | 38,925 | 11.5% | 12 of 12 |
| 2016 | 109,772 | 32.4% | 12 of 12 |
| 2017 | 186,277 | 55.1% | 12 of 12 |
| 2018 | 88,432 | 26.2% | 12 of 12 |
| 2019 | 127,658 | 37.8% | 12 of 12 |
| 2020 | 49,791 | 14.7% | 12 of 12 |
| 2021 | 32,679 | 9.7% | 12 of 12 |
| 2022 | 69,694 | 20.6% | 12 of 12 |
| 2023 | 168,188 | 49.7% | 12 of 12 |
| 2024 | 76,458 | 22.5% | 12 of 12 |
| 2025 | 89,140 | 26.4% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 38.6 | October 1963 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Sacramento Municipal Util Dist as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Union Valley
More plants operated by Sacramento Municipal Util Dist
Questions about Union Valley
How much power does Union Valley produce?
Union Valley reported 89,140 MWh (89.1 GWh) of net generation in 2025, a 26.4% capacity factor on 38.6 MW of nameplate capacity.
Where is Union Valley?
Union Valley is in El Dorado County, California, at 38.8643, −120.4443. It is in the Balancing Authority of Northern California balancing area (BANC).
Who operates Union Valley?
EIA-860M for August 2026 lists Sacramento Municipal Util Dist as the operator (EIA operator ID 16534). The operator is not always the owner.
When did Union Valley start operating?
Its first generator began operating in October 1963, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page