NICKAJACK
OperatingHydro power plant
- Capacity
- 104 MW
- Primary fuel
- Hydro
- County
- Marion County
- Operator
- TENNESSEE VALLEY AUTHORITY
- Status
- Operating
- Commissioned
- 1968
- EIA plant ID
- 3409
- Coordinates
- 35.0026, -85.6205
NICKAJACK, a 104 MW Hydro power plant in Marion County, Tennessee. Operated by TENNESSEE VALLEY AUTHORITY, commissioned 1968.
Weather peril exposure
NICKAJACK is a 104 MW hydro power plant in Marion County, TN, operated by TENNESSEE VALLEY AUTHORITY, commissioned in 1968. Marion County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.2 of 5 at the 30th national percentile. Riverine flooding 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 hydro plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Marion County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Riverine flooding | Relatively Low | 88th | 4.5 of 5 | 0.82 |
| Tornado | Relatively Moderate | 87th | 4.5 of 5 | 0.39 |
| Earthquake | Relatively Low | 80th | 4.2 of 5 | <0.01 |
| Winter weather | Relatively Moderate | 75th | 4.0 of 5 | 5.2 |
| Wildfire | Very Low | 72nd | 3.9 of 5 | <0.01 |
| Strong wind | Relatively Moderate | 65th | 3.6 of 5 | 5.2 |
| Lightning | Relatively Low | 61st | 3.4 of 5 | 61.6 |
| Ice storm | Relatively Low | 57th | 3.3 of 5 | 0.76 |
| Hurricane | Very Low | 38th | 2.5 of 5 | 0.01 |
| Hail | Very Low | 33rd | 2.3 of 5 | 3.8 |
| Heat wave | Very Low | 17th | 1.7 of 5 | 1.6 |
Perils not assessed in Marion 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 Marion 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.