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81.9 MW Hydro operating in Tuolumne, CA
81.9 MW
Nameplate Capacity
1
Generators
unit
Conventional Hydroelectric
Technology
1963
Operating Since
Coordinates
38.1390, -120.3703
County
Tuolumne, CA
Nearby Plants
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Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Pacific Gas & Electric Co. | Pacific Gas and Electric | — |
| Owner(s) | Pacific Gas & Electric Co. | PG&E | — |
| Status | Operating | operating | — |
The Stanislaus hydroelectric plant is located in Tuolumne County, California. The plant, which began operating in 1963, has a total capacity of 81.9 MW from a single generator. It is owned and operated by Pacific Gas & Electric (PG&E). The plant utilizes conventional hydroelectric technology and its primary fuel source is water (WAT).
In the most recent year with available data, Stanislaus generated 268,818 MWh, achieving a capacity factor of 37.4%. The plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Stanislaus ranks as the 47th largest power plant in California out of 247, and 221st nationally out of 1464. Financial data indicates an installed cost of $879.58 per kW.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
California Independent System Operator (CISO)
Grid Voltage
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
0 MWh
Latest Month
268.8K MWh
Annual Generation
37.4%
Capacity Factor
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Hydro with storage · PACIFIC GAS AND ELECTRIC COMPANY · Data from 2015–2024
$926/kW
Installed Cost
$20.5/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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Point of Interconnection
Nearest Substation
Stanislaus
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
STANISLS_7_B1
Pricing Hub
TH_NP15_GEN-APND
Location Type
Pricing Node
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
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FERC issued Authorization for Continued Project Operation, allowing the Stanislaus hydro facility to remain online during the pending surrender and decommissioning proceeding.
sourceFERC released the Final Environmental Assessment for the Stanislaus hydro project, completing the environmental review phase of PG&E's license surrender and decommissioning process.
sourceFERC published scoping meeting notice for PG&E's proposed license surrender, decommissioning, and non-project reuse of Stanislaus project lands, formally initiating the retirement proceeding.
source