DON PEDRO
OperatingHydro power plant
- Capacity
- 203 MW
- Primary fuel
- Hydro
- County
- Tuolumne County
- Operator
- TURLOCK IRRIGATION DISTRICT
- Status
- Operating
- Commissioned
- 1971
- EIA plant ID
- 439
- Generators
- 4
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 475 GWh
- Capacity factor (2024, EIA nameplate)
- 32%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 37.6960, -120.4202
DON PEDRO, a 203 MW Hydro power plant in Tuolumne County, California. Operated by TURLOCK IRRIGATION DISTRICT, commissioned 1971.
How DON PEDRO compares
With 203 MW of capacity, DON PEDRO ranks 70th among the 874 operating power plants Bywatts maps in California and 11th of the 195 operating Hydro plants in the state. It accounts for about 1.5% of California's operating Hydro capacity and 0.3% of all operating capacity in the state. Nationally it is the 88th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1971, it is older than 85% of the 859 operating California plants with a recorded commissioning year. Its operator, TURLOCK IRRIGATION DISTRICT, runs 7 operating plants in California totaling 792 MW. It shares Tuolumne County with 16 other operating plants, including NEW MELONES and DION R HOLM.
EIA-860 lists 4 generators at the site with 171 MW of nameplate capacity, all conventional hydroelectric technology (this page's HIFLD capacity figure is 203 MW). Net generation was 475 GWh in 2024 (a 32% capacity factor), about 2.9 times its 2022 output. Its generators came online between 1971 and 1989.
Grid neighborhood
The nearest named substation is DON PEDRO, under 0.1 miles away; the closest transmission line found within 10 miles is a 230 kV line, about 6.2 miles away. Another 15 operating power plants totaling 672 MW sit within 25 miles; the largest is NEW MELONES (382 MW, Hydro). Within 50 miles is one mapped data center, 801 Tenth Street Modesto (Ayera) in Modesto, about 31.9 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records, EIA-860/923 survey data and PeeringDB data center locations; distances are straight-line. Sources and methodology
Weather peril exposure
DON PEDRO is a 203 MW hydro power plant in Tuolumne County, CA, operated by TURLOCK IRRIGATION DISTRICT, commissioned in 1971. Tuolumne County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.7 of 5 at the 17th national percentile. Wildfire is the leading peril, rated Relatively High by FEMA at the 99th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a hydro plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Tuolumne County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively High | 99th | 4.9 of 5 | 0.01 |
| Riverine flooding | Relatively Moderate | 86th | 4.4 of 5 | 0.96 |
| Heat wave | Relatively Moderate | 72nd | 3.9 of 5 | 3.3 |
| Earthquake | Relatively Low | 69th | 3.8 of 5 | 0.02 |
| Winter weather | Relatively Moderate | 31st | 2.2 of 5 | 33.0 |
| Lightning | Relatively Moderate | 18th | 1.7 of 5 | 20.3 |
| Strong wind | Very Low | 14th | 1.6 of 5 | 0.05 |
| Tornado | Very Low | 5th | 1.2 of 5 | 0.13 |
| Hail | Very Low | 1st | 1.0 of 5 | 0.11 |
Perils not assessed in Tuolumne County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Hurricane | FEMA rating is "Not Applicable" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
| Ice storm | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Tuolumne County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.