BROWNS FERRY
OperatingNuclear power plant
- Capacity
- 3,494 MW
- Primary fuel
- Nuclear
- County
- Limestone County
- Operator
- TENNESSEE VALLEY AUTHORITY
- Status
- Operating
- Commissioned
- 1974
- EIA plant ID
- 46
- Coordinates
- 34.7042, -87.1186
BROWNS FERRY, a 3,494 MW Nuclear power plant in Limestone County, Alabama. Operated by TENNESSEE VALLEY AUTHORITY, commissioned 1974.
Weather peril exposure
BROWNS FERRY is a 3,494 MW nuclear power plant in Limestone County, AL, operated by TENNESSEE VALLEY AUTHORITY, commissioned in 1974. Limestone County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.6 of 5 at the 16th national percentile. Earthquake is the leading peril, rated Relatively Low by FEMA at the 88th 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.
Limestone County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively Low | 88th | 4.5 of 5 | <0.01 |
| Lightning | Relatively Low | 84th | 4.4 of 5 | 61.0 |
| Tornado | Relatively Moderate | 79th | 4.2 of 5 | 0.62 |
| Riverine flooding | Relatively Moderate | 67th | 3.7 of 5 | 2.1 |
| Strong wind | Relatively Moderate | 52nd | 3.1 of 5 | 6.4 |
| Hurricane | Relatively Low | 51st | 3.0 of 5 | 0.03 |
| Ice storm | Relatively Moderate | 48th | 2.9 of 5 | 0.86 |
| Heat wave | Relatively Low | 45th | 2.8 of 5 | 7.6 |
| Winter weather | Relatively Moderate | 28th | 2.1 of 5 | 4.6 |
| Hail | Very Low | 20th | 1.8 of 5 | 4.3 |
| Wildfire | Very Low | 15th | 1.6 of 5 | <0.01 |
Perils not assessed in Limestone 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 Limestone 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.