Collierville Powerhouse — Plant Summary
- EIA Plant ID
- 54555
- Capacity
- 253 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Calaveras, CA
- Operating Since
- 1989
- Generators
- 2
- Operator
- Northern California Power Agny
- Parent Company
- —
- Annual Generation
- 341,671 MWh
- Capacity Factor
- 15.5%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Collierville Powerhouse
OperatingHydro
Ranked #12 of 247 Hydro plants in CA#81 of 1454 nationally
253 MW Hydro operating in Calaveras, CA — California Independent System Operator
EIAGEMWD
253 MW
Nameplate Capacity
2
Generators
units
Conventional Hydroelectric
Technology
1989
Operating Since
Location
Coordinates
38.1446, -120.3805
County
Calaveras, CA
Nearby Plants
- StanislausHydro81.9 MW · 1.1 km
- MurphysHydro3.6 MW · 5.8 km
- AngelsHydro1.4 MW · 16.1 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Northern California Power Agny | Northern California Power Agency | — |
| Owner(s) | Calaveras County Water Dist | Calaveras County Water District [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as Calaveras County Water District [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
Collierville Powerhouse is a 253 MW conventional hydroelectric plant located in Calaveras County, California. The plant began operating in 1989 and is owned and operated by Northern California Power Agency. It consists of 2 generators using water as its primary fuel source. Collierville Powerhouse is the 12th largest hydroelectric plant in California out of 42 such plants, and ranks 81st nationally out of 194.
The plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. In the latest year of available data, Collierville Powerhouse generated 341,671 MWh of electricity, achieving a capacity factor of 15.5%.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
230 kV
Regulatory Status
RE
Entity Type
Political Subdivision
Sector
Electric Utility
Generation
35.1K MWh
Latest Month
341.7K MWh
Annual Generation
15.5%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
CAISO
LMP Node
COLVIL_7_PL1x2-APND
Pricing Hub
TH_NP15_GEN-APND
Node Source
EIA-860 direct report
News & Articles (6)Beta
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Hydro energy reduced as California reservoirs shrink
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SJV Water·4 years ago
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Hydro energy reduced as California reservoirs shrink
California's reservoirs and rivers are startlingly low, forcing many of the state's more than 270 hydropower facilities to generate less power.
SJV Water·4 years ago
Last updated 2026-03-26
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