Tulloch — Plant Summary
- EIA Plant ID
- 416
- Capacity
- 29.9 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Tuolumne, CA
- Operating Since
- 1958
- Generators
- 3
- Operator
- Oakdale&South San Joaquin Irrigation D.
- Parent Company
- —
- Annual Generation
- 103,604 MWh
- Capacity Factor
- 39.4%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Tulloch
OperatingHydro
Ranked #81 of 247 Hydro plants in CA#409 of 1454 nationally
29.9 MW Hydro operating in Tuolumne, CA — California Independent System Operator
EIAWD
29.9 MW
Nameplate Capacity
3
Generators
units
Conventional Hydroelectric
Technology
1958
Operating Since
Location
Coordinates
37.8763, -120.6052
County
Tuolumne, CA
Nearby Plants
- Sonora 1Solar1.5 MW · 6.9 km
- New MelonesHydro300 MW · 10.4 km
- Sierra Energy Storage, LLCBESS10 MW · 11.2 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Oakdale&South San Joaquin Irrigation D. | — | — |
| Owner(s) | Oakdale&South San Joaquin Irrigation D. | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Tulloch is a hydroelectric power plant located in Tuolumne County, California. The plant has a total capacity of 29.9 MW, distributed across three generators utilizing conventional hydroelectric technology. Tulloch began operating in 1958 and is currently owned and operated by Oakdale & South San Joaquin Irrigation District. The plant is interconnected 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 with available data, Tulloch generated 103,604 MWh of electricity, achieving a capacity factor of 39.4%. Tulloch ranks as the 82nd largest power plant in California out of 247 facilities and is ranked 413th nationally out of 1464 plants.
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
NR
Entity Type
Political Subdivision
Sector
IPP Non-CHP
Generation
1.1K MWh
Latest Month
103.6K MWh
Annual Generation
39.4%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
CAISO
LMP Node
TULLCK_7_UNITS-APND
Pricing Hub
TH_NP15_GEN-APND
Location Type
Aggregated Node
Node Source
Curated node match
News & Articles (10)Beta
General
Central Valley fishing spots ranked this week; Fresno-area lakes, Pismo, coast
Best bets. Delta stripers and sturgeon hitting, Alan Fong said. Don Pedro bass and trout biting, Aaron Jones reported.
Fresno Bee·4 months ago
General
Central Valley fishing spots ranked this week; Fresno-area lakes, Pismo, coast
Best bets. Delta stripers and sturgeon hitting, Alan Fong said. Don Pedro bass and trout biting, Aaron Jones reported.
Fresno Bee·4 months ago
General
Central Valley fishing spots ranked this week; Fresno-area lakes, Pismo, coast
Best bets. Delta stripers and sturgeon hitting, Alan Fong said. Don Pedro bass and trout biting, Aaron Jones reported.
Fresno Bee·4 months ago
General
Central Valley fishing spots ranked this week; Fresno-area lakes, Pismo, coast
Best bets. Delta stripers and sturgeon hitting, Alan Fong said. Don Pedro bass and trout biting, Aaron Jones reported.
Fresno Bee·4 months ago
Last updated 2026-03-26
View all 10 articles