THUMS
OperatingNatural Gas power plant
- Capacity
- 57 MW
- Primary fuel
- Natural Gas
- County
- Los Angeles County
- Operator
- THUMS LONG BEACH COMPANY
- Status
- Operating
- Commissioned
- 2003
- EIA plant ID
- 56051
- Generators
- 1
- Technology
- Natural Gas Fired Combustion Turbine
- Net generation (2024)
- 349 GWh
- Capacity factor (2024, EIA nameplate)
- 69%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 33.7684, -118.2141
THUMS, a 57 MW Natural Gas power plant in Los Angeles County, California. Operated by THUMS LONG BEACH COMPANY, commissioned 2003.
How THUMS compares
With 57 MW of capacity, THUMS ranks 225th among the 874 operating power plants Bywatts maps in California and 83rd of the 190 operating Natural Gas plants in the state. It accounts for about 0.2% of California's operating Natural Gas capacity and under 0.1% of all operating capacity in the state. Nationally it is the 784th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2003, it is older than 51% of the 859 operating California plants with a recorded commissioning year. It shares Los Angeles County with 110 other operating plants, including AES ALAMITOS LLC and CASTAIC.
EIA-860 lists 1 generator at the site with 57 MW of nameplate capacity, all natural gas fired combustion turbine technology. Net generation was 349 GWh in 2024 (a 69% capacity factor), about 2 times its 2022 output.
Grid neighborhood
The nearest named substation is THUMSGEN, under 0.1 miles away; the closest transmission line found within 10 miles is a 230 kV line, about 0.7 miles away. Another 53 operating power plants totaling 8,319 MW sit within 25 miles; the largest is AES ALAMITOS LLC (1,997 MW, Natural Gas). Within 50 miles are 16 mapped data centers; the nearest is Equinix LA3/LA4 - Los Angeles, El Segundo in El Segundo, about 14.4 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
THUMS is a 57 MW natural gas power plant in Los Angeles County, CA, operated by THUMS LONG BEACH COMPANY, commissioned in 2003. Los Angeles County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.0 of 5 at the 25th national percentile. Earthquake is the leading peril, rated Very High by FEMA at the 99th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Los Angeles County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Very High | 99th | 5.0 of 5 | 0.09 |
| Wildfire | Very High | 98th | 4.9 of 5 | <0.01 |
| Riverine flooding | Very High | 92nd | 4.7 of 5 | 4.0 |
| Heat wave | Relatively High | 50th | 3.0 of 5 | 9.5 |
| Coastal flooding | Relatively High | 34th | 2.4 of 5 | 2.2 |
| Tornado | Relatively High | 13th | 1.5 of 5 | 0.49 |
| Hail | Relatively Moderate | 12th | 1.5 of 5 | 0.10 |
| Strong wind | Relatively Moderate | 0th | 1.0 of 5 | 0.15 |
| Winter weather | Relatively Moderate | 0th | 1.0 of 5 | 6.6 |
| Lightning | Very High | 0th | 1.0 of 5 | 8.4 |
Perils not assessed in Los Angeles 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 "No Rating" for this county |
| Ice storm | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Los Angeles 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.