Moccasin — Plant Summary
- EIA Plant ID
- 381
- Capacity
- 96.8 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Tuolumne, CA
- Operating Since
- 1969
- Generators
- 2
- Operator
- City & County of San Francisco
- Parent Company
- —
- Annual Generation
- 276,555 MWh
- Capacity Factor
- 32.5%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Moccasin
OperatingHydro
Ranked #44 of 247 Hydro plants in CA#198 of 1454 nationally
96.8 MW Hydro operating in Tuolumne, CA — California Independent System Operator
EIAGEMWD
96.8 MW
Nameplate Capacity
2
Generators
units
Conventional Hydroelectric
Technology
1969
Operating Since
Location
Coordinates
37.8094, -120.2993
County
Tuolumne, CA
Nearby Plants
- Moccasin Low Head Hydro ProjectHydro2.9 MW · 1.4 km
- Sierra Pacific Chinese CampSolar3.6 MW · 15.9 km
- Don PedroHydro170.8 MW · 16.5 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | City & County of San Francisco | City & County of San Francisco | — |
| Owner(s) | City & County of San Francisco | City & County of San Francisco [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as City & County of San Francisco [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
Moccasin is a 96.8 MW hydroelectric power plant located in Tuolumne County, California. The plant began operating in 1969 and consists of two generators utilizing conventional hydroelectric technology. It is owned and operated by the City & County of San Francisco. Moccasin is connected to the California Independent System Operator (CAISO) balancing authority and resides within the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year of reported data, Moccasin generated 276,555 MWh of electricity, achieving a capacity factor of 32.5%. The plant is the 44th largest in California out of 247 facilities and ranks 198th nationally out of 1464 power plants. Its primary fuel source is water (WAT).
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
115 kV
Regulatory Status
RE
Entity Type
Municipal
Sector
Electric Utility
Generation
5.4K MWh
Latest Month
276.6K MWh
Annual Generation
32.5%
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
INTKEP_2_UNITS-APND
Pricing Hub
TH_NP15_GEN-APND
Location Type
Aggregated Node
Node Source
EIA-860 direct report
News & Articles (10)Beta
Industry·technology
Tennessee wastewater treatment plant launches conversion project
The Moccasin Bend Environmental Campus will produce electricity from wastewater methane.
Waste Today -·5 days ago
Hazards·extreme cold
Here's what life looks like when you have no heat, electricity and it's freezing cold outside
Lori Osborne took photos to document the four days her community of Pimicikamak Cree Nation was without power, leaving her family with...
CBC·4 weeks ago
General
Moccasin
A company town, Moccasin is entirely owned by the City and County of San Francisco. Homes are for employees who work for the city or state.
myMotherLode.com·5 months ago
General
Why San Francisco still owns a California town with just 63 people
Although it's approximately 140 miles east of the Golden Gate Bridge, Moccasin is perhaps the safest, cleanest and quietest part of San...
SFGATE·6 months ago
Last updated 2026-03-14
View all 10 articles