Atlantic Alumina, Gramercy Operations
Natural gas power plant · St James County, Louisiana
Nameplate capacity
85 MW
Rank in Louisiana
#47
of 98 plants
In service since
1958
February 1958
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combustion Turbine
- Operator
- Atalco Gramercy LLC
- County
- St James County
- Generating units
- 5
- Share of state capacity
- 0.29%
- Rank among natural gas plants in Louisiana
- #32 of 53
- EIA plant code
- 50846
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GT4 | Natural Gas Fired Combustion Turbine | 25 MW | 21 MW | 1974 | Operating |
| ST1 | Natural Gas Steam Turbine | 19 MW | 17 MW | 1958 | Operating |
| ST2 | Natural Gas Steam Turbine | 19 MW | 17 MW | 1958 | Operating |
| GT3 | Natural Gas Fired Combustion Turbine | 16 MW | 15 MW | 1969 | Operating |
| ST3 | Natural Gas Steam Turbine | 7.2 MW | 6.0 MW | 1969 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Louisiana
| Gaylord Container Bogalusa | Other | 100 MW |
| Bayou Galion Solar Project | Solar | 98 MW |
| ExxonMobil Baton Rouge Turbine Generator | Natural gas | 85 MW |
| Plant 31 Paper Mill | Natural gas | 84 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 85 MW solar plant and a 85 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Louisiana power plants · What Louisiana actually generates