Colbert
Colbert is a natural gas plant in Colbert County, Alabama, operated by Tennessee Valley Authority. Of its current capacity, 694 MW came online between 2023 and 2025. Retired units here add up to 1,350 MW across 5 units, taken out of service in 2016. Eight units here can switch between natural gas and oil.
Nameplate capacity, 2025
1,170 MW
1,026 MW net summer capacity
11 operable units
- Gas combustion turbine1,170 MW100%
Unit by unit, 1955 to 2025
operating in 2025retiredbar height follows unit size
Unit 1 Coal steam, 200 MW, 1955–2016
Unit 2 Coal steam, 200 MW, 1955–2016
Unit 3 Coal steam, 200 MW, 1955–2016
Unit 4 Coal steam, 200 MW, 1955–2016
Unit 5 Coal steam, 550 MW, 1965–2016
Unit GT1 Gas combustion turbine, 59.5 MW, 1972
Unit GT2 Gas combustion turbine, 59.5 MW, 1972
Unit GT3 Gas combustion turbine, 59.5 MW, 1972
Unit GT4 Gas combustion turbine, 59.5 MW, 1972
Unit GT5 Gas combustion turbine, 59.5 MW, 1972
Unit GT6 Gas combustion turbine, 59.5 MW, 1972
Unit GT7 Gas combustion turbine, 59.5 MW, 1972
Unit GT8 Gas combustion turbine, 59.5 MW, 1972
Unit GT10 Gas combustion turbine, 231 MW, 2023
Unit GT11 Gas combustion turbine, 231 MW, 2023
Unit GT9 Gas combustion turbine, 231 MW, 2023
Among Alabama’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1Browns Ferry3,854 MW
- 2Barry3,344 MW
- 3James H Miller Jr2,822 MW
- 7E B Harris Electric Generating Plant1,304 MW
- 8Greene County1,288 MW
- 9Colbertthis plant
- 10Tenaska Lindsay Hill Generating Station939 MW
- 11Central Alabama Generating Station927 MW
Other rankings
- All US power plants
- 238th of 14,286
- Power plants in Alabama
- 9th of 78
- US natural gas plants
- 107th of 1,961
- Natural gas plants in Alabama
- 6th of 26
- Plants in the Tennessee Valley Authority balancing area
- 13th of 152
- Plants run by Tennessee Valley Authority
- 13th of 53
- Biggest single unit, among Alabama’s plants
- 15th of 78
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GT1 | Gas combustion turbine | 59.5 MW | 45.4 MW | 1972 | Operating |
| GT2 | Gas combustion turbine | 59.5 MW | 45.4 MW | 1972 | Operating |
| GT3 | Gas combustion turbine | 59.5 MW | 45.4 MW | 1972 | Operating |
| GT4 | Gas combustion turbine | 59.5 MW | 45.4 MW | 1972 | Operating |
| GT5 | Gas combustion turbine | 59.5 MW | 45.4 MW | 1972 | Operating |
| GT6 | Gas combustion turbine | 59.5 MW | 45.4 MW | 1972 | Operating |
| GT7 | Gas combustion turbine | 59.5 MW | 45.4 MW | 1972 | Operating |
| GT8 | Gas combustion turbine | 59.5 MW | 45.4 MW | 1972 | Operating |
| GT10 | Gas combustion turbine | 231 MW | 221 MW | 2023 | Operating |
| GT11 | Gas combustion turbine | 231 MW | 221 MW | 2023 | Operating |
| GT9 | Gas combustion turbine | 231 MW | 221 MW | 2023 | Operating |
Retired units
| Unit | Technology | Nameplate | In service |
|---|---|---|---|
| 1 | Coal steam | 200 MW | 1955–2016 |
| 2 | Coal steam | 200 MW | 1955–2016 |
| 3 | Coal steam | 200 MW | 1955–2016 |
| 4 | Coal steam | 200 MW | 1955–2016 |
| 5 | Coal steam | 550 MW | 1965–2016 |
Grid and site
- Balancing area
- Tennessee Valley Authority
- Reliability region
- SERC Reliability Corporation
- Highest grid connection voltage
- 161 kV
- Water source
- Tennessee River
- Nearest town on record
- Tuscumbia
- Operator type
- Utility
- Coordinates
- 34.744°N, 87.849°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| Muscle Shoals | Solar | 227 MW | 3.6 mi northwest |
| River Bend Solar, LLC (AL) | Solar | 75 MW | 6.1 mi north |
| Wilson Dam | Hydroelectric | 667 MW | 13.2 mi east |
| Wheeler Dam | Hydroelectric | 404 MW | 26.8 mi east |
| Packaging Corp of America | Biomass and waste | 72.5 MW | 31.6 mi northwest |
| Pickwick Landing Dam | Hydroelectric | 240 MW | 31.9 mi northwest |
| Browns Ferry | Nuclear | 3,854 MW | 41.5 mi east |
| Decatur-Morgan Co LFG Recovery Project | Biomass and waste | 1.6 MW | 43.3 mi east |