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38.6 MW Hydro operating in El Dorado, CA — Balancing Authority of Northern California
38.6 MW
Nameplate Capacity
1
Generators
unit
Conventional Hydroelectric
Technology
1963
Operating Since
Coordinates
38.8643, -120.4443
County
El Dorado, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Sacramento Municipal Util Dist | — | — |
| Owner(s) | Sacramento Municipal Util Dist | — | — |
| Status | Operating | — | — |
Union Valley is a hydroelectric power plant located in El Dorado County, California. The plant has a total capacity of 38.6 MW and began operating in 1963. It is owned and operated by the Sacramento Municipal Utility District (SMUD). The plant utilizes a single generator and is fueled by water (WAT) using conventional hydroelectric technology.
In the most recent year of reported data, Union Valley generated 76,458 MWh of electricity, resulting in a capacity factor of 22.4%. The plant operates within the Balancing Authority of Northern California (BANC) and is part of the Western Electricity Coordinating Council (WECC) NERC region. Union Valley is ranked as the 73rd largest power plant in California out of 247, and 358th nationally out of 1464.
Generated from EIA, GEM, and public data sources
Grid Region
California (non-ISO)
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
333 MWh
Latest Month
76.5K MWh
Annual Generation
22.4%
Capacity Factor
2013
$2,294/kW
Est. Construction Cost
Total estimated cost: $88.6M
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-26
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ask pi about Union ValleyBalancing Authority of Northern California (BANC)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Political Subdivision
Sector
Electric Utility