CALEDONIA
OperatingNatural Gas power plant
- Capacity
- 801 MW
- Primary fuel
- Natural Gas
- County
- Lowndes County
- Operator
- TENNESSEE VALLEY AUTHORITY
- Status
- Operating
- Commissioned
- 2003
- EIA plant ID
- 55197
- Generators
- 6
- Technology
- Natural Gas Fired Combined Cycle
- Net generation (2024)
- 5,125 GWh
- Capacity factor (2024, EIA nameplate)
- 73%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 33.6471, -88.2721
CALEDONIA, an 801 MW Natural Gas power plant in Lowndes County, Mississippi. Operated by TENNESSEE VALLEY AUTHORITY, commissioned 2003.
How CALEDONIA compares
With 801 MW of capacity, CALEDONIA ranks 9th among the 37 operating power plants Bywatts maps in Mississippi and 6th of the 21 operating Natural Gas plants in the state. It accounts for about 8.8% of Mississippi's operating Natural Gas capacity and 5.2% of all operating capacity in the state. Nationally it is the 152nd-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2003, it is newer than 68% of the 35 operating Mississippi plants with a recorded commissioning year. Its operator, TENNESSEE VALLEY AUTHORITY, runs 5 operating plants in Mississippi totaling 3,089 MW. It shares Lowndes County with one other operating plant, WEYERHAEUSER COLUMBUS MS.
EIA-860 lists 6 generators at the site with 801 MW of nameplate capacity, all natural gas fired combined cycle technology. Net generation was 5,125 GWh in 2024 (a 73% capacity factor), up 10% from 2022.
Grid neighborhood
The nearest named substation is ABERDEEN, about 19.3 miles away; the closest transmission line found within 10 miles is a 500 kV line owned by TENNESSEE VALLEY AUTHORITY, under 0.1 miles away. One other operating power plant sits within 25 miles: WEYERHAEUSER COLUMBUS MS (129 MW, Biomass).
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
CALEDONIA is an 801 MW natural gas power plant in Lowndes County, MS, operated by TENNESSEE VALLEY AUTHORITY, commissioned in 2003. Lowndes County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.0 of 5 at the 50th national percentile. Tornado is the leading peril, rated Relatively High by FEMA at the 95th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Lowndes County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Tornado | Relatively High | 95th | 4.8 of 5 | 0.50 |
| Earthquake | Relatively Low | 87th | 4.5 of 5 | <0.01 |
| Lightning | Relatively Moderate | 84th | 4.4 of 5 | 66.5 |
| Strong wind | Relatively High | 72nd | 3.9 of 5 | 2.0 |
| Ice storm | Relatively Moderate | 71st | 3.8 of 5 | 0.94 |
| Riverine flooding | Relatively Moderate | 69th | 3.8 of 5 | 1.7 |
| Hurricane | Relatively Low | 65th | 3.6 of 5 | 0.06 |
| Hail | Relatively Moderate | 53rd | 3.1 of 5 | 3.5 |
| Heat wave | Relatively Moderate | 48th | 2.9 of 5 | 11.7 |
| Winter weather | Very Low | 27th | 2.1 of 5 | 2.8 |
| Wildfire | Very Low | 27th | 2.1 of 5 | <0.01 |
Perils not assessed in Lowndes 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 Lowndes 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.