Primient Decatur Plant Cogen
Natural gas power plant · Macon County, Illinois
Nameplate capacity
65 MW
Rank in Illinois
#124
of 580 plants
In service since
1989
January 1989
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Steam Turbine
- Operator
- Primary Products Ingredients Americas, LLC
- County
- Macon County
- Generating units
- 1
- Share of state capacity
- 0.12%
- Rank among natural gas plants in Illinois
- #36 of 72
- EIA plant code
- 10867
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Natural Gas Steam Turbine | 65 MW | 62 MW | 1989 | 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 Illinois
| Mulligan Solar, LLC | Solar | 70 MW |
| Whitney Hill Wind Power LLC | Wind | 65 MW |
| University of Illinois Cogen Facility | Natural gas | 60 MW |
| Ingredion Incorporated | Natural gas | 55 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 65 MW solar plant and a 65 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 Illinois power plants · What Illinois actually generates