TRINITY
OperatingHydro power plant
- Capacity
- 140 MW
- Primary fuel
- Hydro
- County
- Trinity County
- Operator
- U S BUREAU OF RECLAMATION
- Status
- Operating
- Commissioned
- 1964
- EIA plant ID
- 451
- Generators
- 2
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 404 GWh
- Capacity factor (2024, EIA nameplate)
- 33%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 40.7973, -122.7626
TRINITY, a 140 MW Hydro power plant in Trinity County, California. Operated by U S BUREAU OF RECLAMATION, commissioned 1964.
How TRINITY compares
With 140 MW of capacity, TRINITY ranks 118th among the 874 operating power plants Bywatts maps in California and 26th of the 195 operating Hydro plants in the state. It accounts for about 1.0% of California's operating Hydro capacity and 0.2% of all operating capacity in the state. Nationally it is the 130th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1964, it is older than 88% of the 859 operating California plants with a recorded commissioning year. Its operator, U S BUREAU OF RECLAMATION, runs 10 operating plants in California totaling 2,087 MW. It shares Trinity County with 2 other operating plants, KEKAWAKA POWER HOUSE and THREE FORKS WATER POWER PROJECT.
EIA-860 lists 2 generators at the site with 140 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 404 GWh in 2024 (a 33% capacity factor), about 3 times its 2022 output.
Grid neighborhood
The nearest named substation is TRINITY DAM (69 kV), under 0.1 miles away; the closest transmission line found within 10 miles is a 230 kV line, under 0.1 miles away. Another 6 operating power plants totaling 1,196 MW sit within 25 miles; the largest is SHASTA (714 MW, Hydro).
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
TRINITY is a 140 MW hydro power plant in Trinity County, CA, operated by U S BUREAU OF RECLAMATION, commissioned in 1964. Trinity County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.7 of 5 at the 41st national percentile. Wildfire is the leading peril, rated Relatively High by FEMA at the 100th 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.
Trinity County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively High | 100th | 5.0 of 5 | 0.03 |
| Riverine flooding | Relatively Moderate | 99th | 5.0 of 5 | 0.21 |
| Earthquake | Relatively Low | 93rd | 4.7 of 5 | 0.03 |
| Heat wave | Relatively Low | 64th | 3.5 of 5 | 4.8 |
| Hail | Very Low | 14th | 1.5 of 5 | 0.09 |
| Tornado | Very Low | 6th | 1.2 of 5 | 0.03 |
| Lightning | Very Low | 5th | 1.2 of 5 | 9.6 |
| Winter weather | Very Low | 4th | 1.1 of 5 | 24.1 |
| Strong wind | Very Low | 1st | 1.0 of 5 | 0.01 |
Perils not assessed in Trinity 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 Trinity 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.