OLD HICKORY
OperatingHydro power plant
- Capacity
- 104 MW
- Primary fuel
- Hydro
- County
- Sumner County
- Operator
- USCE-NASHVILLE DISTRICT
- Status
- Operating
- Commissioned
- 1957
- EIA plant ID
- 3426
- Generators
- 4
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 437 GWh
- Capacity factor (2024, EIA nameplate)
- 48%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 36.2973, -86.6556
OLD HICKORY, a 104 MW Hydro power plant in Sumner County, Tennessee. Operated by USCE-NASHVILLE DISTRICT, commissioned 1957.
How OLD HICKORY compares
With 104 MW of capacity, OLD HICKORY ranks 24th among the 53 operating power plants Bywatts maps in Tennessee and 13th of the 29 operating Hydro plants in the state. It accounts for about 2.5% of Tennessee's operating Hydro capacity and 0.5% of all operating capacity in the state. Nationally it is the 172nd-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1957, it is older than 52% of the 53 operating Tennessee plants with a recorded commissioning year. Its operator, USCE-NASHVILLE DISTRICT, runs 6 operating plants in Tennessee totaling 457 MW. It shares Sumner County with one other operating plant, GALLATIN.
EIA-860 lists 4 generators at the site with 104 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 437 GWh in 2024 (a 48% capacity factor), down 10% from 2022.
Grid neighborhood
The nearest named substation is NORTH NASHVILLE, about 3.5 miles away; the closest transmission line found within 10 miles is a 161 kV line owned by TENNESSEE VALLEY AUTHORITY, about 0.4 miles away. Another 4 operating power plants totaling 1,972 MW sit within 25 miles; the largest is GALLATIN (1,918 MW, Coal). Within 50 miles are 4 mapped data centers; the nearest is IRIS - Nashville in Nashville, about 11.5 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records, EIA-860/923 survey data and PeeringDB data center locations; distances are straight-line. Sources and methodology
Weather peril exposure
OLD HICKORY is a 104 MW hydro power plant in Sumner County, TN, operated by USCE-NASHVILLE DISTRICT, commissioned in 1957. Sumner County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.4 of 5 at the 59th national percentile. Earthquake is the leading peril, rated Relatively Moderate by FEMA at the 85th 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.
Sumner County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively Moderate | 85th | 4.4 of 5 | <0.01 |
| Ice storm | Relatively High | 75th | 4.0 of 5 | 0.68 |
| Riverine flooding | Relatively Moderate | 74th | 4.0 of 5 | 2.1 |
| Winter weather | Relatively High | 73rd | 3.9 of 5 | 6.2 |
| Lightning | Relatively High | 73rd | 3.9 of 5 | 57.5 |
| Tornado | Relatively High | 68th | 3.7 of 5 | 0.42 |
| Hail | Relatively Moderate | 67th | 3.7 of 5 | 3.3 |
| Heat wave | Relatively Low | 60th | 3.4 of 5 | 4.6 |
| Strong wind | Relatively High | 40th | 2.6 of 5 | 6.2 |
| Hurricane | Very Low | 15th | 1.6 of 5 | <0.01 |
| Wildfire | Very Low | 5th | 1.2 of 5 | <0.01 |
Perils not assessed in Sumner 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 Sumner 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.