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170.8 MW Hydro operating in Tuolumne, CA
170.8 MW
Nameplate Capacity
4
Generators
units
Conventional Hydroelectric
Technology
1971
Operating Since
Coordinates
37.6960, -120.4202
County
Tuolumne, CA
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Turlock Irrigation District | Turlock Irrigation District | — |
| Owner(s) | Modesto Irrigation District, Turlock Irrigation District | Modesto Irrigation District | — |
| Status | Operating | operating | — |
New Don Pedro Dam, often known simply as Don Pedro Dam, is an earthen embankment dam across the Tuolumne River, about 2 miles (3.2 km) northeast of La Grange, in Tuolumne County, California. The dam was completed in 1971, after four years of construction, to replace the 1924 concrete-arch Don Pedro Dam.
Read more on WikipediaThe Don Pedro Hydroelectric Plant is located in Tuolumne County, California. The plant has a total capacity of 170.8 MW across 4 generators, utilizing conventional hydroelectric technology and water (WAT) as its primary fuel source. It began operating in 1971. The plant is owned by Modesto Irrigation District and operated by Turlock Irrigation District, which also serves as the balancing authority. Don Pedro operates within the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year with available data, the plant generated 279,866 MWh of electricity, resulting in a capacity factor of 18.6%. Don Pedro ranks as the 19th largest hydroelectric plant out of 42 in California, and 113th out of 194 nationally.
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
Turlock Irrigation District (TIDC)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Political Subdivision
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.
24.1K MWh
Latest Month
279.9K MWh
Annual Generation
18.6%
Capacity Factor
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2013
$2,294/kW
Est. Construction Cost
Total estimated cost: $391.9M
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This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
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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