Plaquemine Cogeneration Plant
Natural gas power plant · Iberville County, Louisiana
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Dow Chemical Co
- County
- Iberville County
- Generating units
- 7
- Share of state capacity
- 3.71%
- Rank among natural gas plants in Louisiana
- #3 of 53
- EIA plant code
- 55419
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| G500 | Natural Gas Fired Combined Cycle | 198 MW | 151 MW | 2004 | Operating |
| G600 | Natural Gas Fired Combined Cycle | 198 MW | 151 MW | 2004 | Operating |
| G700 | Natural Gas Fired Combined Cycle | 198 MW | 151 MW | 2004 | Operating |
| G800 | Natural Gas Fired Combined Cycle | 198 MW | 151 MW | 2004 | Operating |
| ST5 | Natural Gas Fired Combined Cycle | 195 MW | 189 MW | 2004 | Operating |
| ST6 | Natural Gas Fired Combined Cycle | 49 MW | 49 MW | 2024 | Operating |
| ST7 | Natural Gas Fired Combined Cycle | 49 MW | 49 MW | 2024 | 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
| Acadia Energy Center | Natural gas | 1,389 MW |
| Waterford 3 | Nuclear | 1,200 MW |
| River Bend | Nuclear | 1,036 MW |
| Little Gypsy | Natural gas | 1,003 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 1,085 MW solar plant and a 1,085 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