SOUTH TEXAS PROJECT
OperatingNuclear power plant
- Capacity
- 2,709 MW
- Primary fuel
- Nuclear
- County
- Matagorda County
- Operator
- STP NUCLEAR OPERATING CO
- Status
- Operating
- Commissioned
- 1988
- EIA plant ID
- 6251
- Coordinates
- 28.7950, -96.0481
SOUTH TEXAS PROJECT, a 2,709 MW Nuclear power plant in Matagorda County, Texas. Operated by STP NUCLEAR OPERATING CO, commissioned 1988.
Weather peril exposure
SOUTH TEXAS PROJECT is a 2,709 MW nuclear power plant in Matagorda County, TX, operated by STP NUCLEAR OPERATING CO, commissioned in 1988. Matagorda County carries critical modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.4 of 5 at the 85th national percentile. Hurricane is the leading peril, rated Relatively High by FEMA at the 98th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a nuclear plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Matagorda County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hurricane | Relatively High | 98th | 4.9 of 5 | 0.19 |
| Wildfire | Relatively Low | 72nd | 3.9 of 5 | <0.01 |
| Coastal flooding | Relatively Moderate | 58th | 3.3 of 5 | 3.7 |
| Riverine flooding | Relatively Low | 55th | 3.2 of 5 | 1.0 |
| Heat wave | Relatively Low | 51st | 3.1 of 5 | 14.7 |
| Hail | Relatively Low | 33rd | 2.3 of 5 | 1.1 |
| Lightning | Relatively Moderate | 33rd | 2.3 of 5 | 64.0 |
| Tornado | Relatively Low | 28th | 2.1 of 5 | 0.73 |
| Strong wind | Relatively Low | 16th | 1.6 of 5 | 0.72 |
| Winter weather | Very Low | 11th | 1.4 of 5 | 0.91 |
| Ice storm | Relatively Low | 11th | 1.4 of 5 | 0.56 |
| Earthquake | Very Low | 10th | 1.4 of 5 | <0.01 |
Model hail, wind and flood exposure for Matagorda 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.