J STROM THURMOND
OperatingHydro power plant
- Capacity
- 362 MW
- Primary fuel
- Hydro
- County
- McCormick County
- Operator
- USCE-SAVANNAH DISTRICT
- Status
- Operating
- Commissioned
- 1953
- EIA plant ID
- 3323
- Coordinates
- 33.6610, -82.1975
J STROM THURMOND, a 362 MW Hydro power plant in McCormick County, South Carolina. Operated by USCE-SAVANNAH DISTRICT, commissioned 1953.
Weather peril exposure
J STROM THURMOND is a 362 MW hydro power plant in McCormick County, SC, operated by USCE-SAVANNAH DISTRICT, commissioned in 1953. McCormick County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.2 of 5 at the 31st national percentile. Lightning is the leading peril, rated Very Low by FEMA at the 97th 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.
McCormick County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Lightning | Very Low | 97th | 4.9 of 5 | 55.9 |
| Earthquake | Very Low | 80th | 4.2 of 5 | <0.01 |
| Ice storm | Relatively Low | 80th | 4.2 of 5 | 1.1 |
| Hurricane | Relatively Low | 78th | 4.1 of 5 | 0.06 |
| Strong wind | Relatively Low | 57th | 3.3 of 5 | 3.7 |
| Riverine flooding | Very Low | 56th | 3.2 of 5 | 0.14 |
| Tornado | Relatively Low | 45th | 2.8 of 5 | 0.25 |
| Wildfire | Very Low | 44th | 2.7 of 5 | <0.01 |
| Hail | Very Low | 35th | 2.4 of 5 | 3.5 |
| Winter weather | Very Low | 24th | 2.0 of 5 | 1.9 |
| Heat wave | Very Low | 22nd | 1.9 of 5 | 3.3 |
Perils not assessed in McCormick 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 |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for McCormick 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.