WATERFORD 3
OperatingNuclear power plant
- Capacity
- 1,200 MW
- Primary fuel
- Nuclear
- County
- St. Charles Parish
- Operator
- ENTERGY LOUISIANA INC
- Status
- Operating
- Commissioned
- 1985
- EIA plant ID
- 4270
- Coordinates
- 29.9948, -90.4714
WATERFORD 3, a 1,200 MW Nuclear power plant in St. Charles Parish, Louisiana. Operated by ENTERGY LOUISIANA INC, commissioned 1985.
Weather peril exposure
WATERFORD 3 is a 1,200 MW nuclear power plant in St. Charles Parish, LA, operated by ENTERGY LOUISIANA INC, commissioned in 1985. St. Charles Parish carries critical modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.7 of 5 at the 92nd national percentile. Hurricane is the leading peril, rated Relatively High by FEMA at the 99th 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.
St. Charles Parish hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hurricane | Relatively High | 99th | 4.9 of 5 | 0.28 |
| Coastal flooding | Very High | 98th | 4.9 of 5 | 3.8 |
| Lightning | Relatively Moderate | 87th | 4.5 of 5 | 91.2 |
| Heat wave | Relatively Low | 71st | 3.8 of 5 | 14.7 |
| Hail | Relatively Low | 50th | 3.0 of 5 | 1.0 |
| Riverine flooding | Relatively Low | 47th | 2.9 of 5 | 1.5 |
| Tornado | Relatively Moderate | 43rd | 2.7 of 5 | 0.26 |
| Wildfire | Very Low | 36th | 2.4 of 5 | <0.01 |
| Winter weather | Relatively Low | 33rd | 2.3 of 5 | 0.84 |
| Earthquake | Very Low | 28th | 2.1 of 5 | <0.01 |
| Ice storm | Very Low | 11th | 1.4 of 5 | 0.07 |
| Strong wind | Relatively Low | 11th | 1.4 of 5 | 1.1 |
Model hail, wind and flood exposure for St. Charles Parish 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.