Nameplate capacity
647 MW
Rank in Indiana
#15
of 224 plants
In service since
1991
June 1991
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combustion Turbine
- Operator
- Southern Indiana Gas & Elec Co
- County
- Posey County
- Generating units
- 4
- Share of state capacity
- 1.88%
- Rank among natural gas plants in Indiana
- #7 of 43
- EIA plant code
- 6137
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 6 | Natural Gas Fired Combustion Turbine | 236 MW | 219 MW | 2025 | Operating |
| 7 | Natural Gas Fired Combustion Turbine | 236 MW | 219 MW | 2025 | Operating |
| 4 | Natural Gas Fired Combustion Turbine | 88 MW | 80 MW | 1991 | Operating |
| 5 | Natural Gas Fired Combustion Turbine | 88 MW | 80 MW | 2002 | 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 Indiana
| Vermillion Energy Facility | Natural gas | 692 MW |
| Sugar Creek Power | Natural gas | 665 MW |
| Eagle Valley (IN) | Natural gas | 644 MW |
| Fowler Ridge Wind Farm LLC | Wind | 588 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 647 MW solar plant and a 647 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 Indiana power plants · What Indiana actually generates