Archer Daniels Midland Decatur
Coal power plant · Macon County, Illinois
Nameplate capacity
335 MW
Rank in Illinois
#36
of 580 plants
In service since
1987
April 1987
Details
- Primary fuel
- Coal
- Technology
- Conventional Steam Coal
- Operator
- Archer Daniels Midland Co
- County
- Macon County
- Generating units
- 7
- Share of state capacity
- 0.64%
- Rank among coal plants in Illinois
- #6 of 8
- EIA plant code
- 10865
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN8 | Conventional Steam Coal | 105 MW | 105 MW | 2005 | Operating |
| GEN7 | Conventional Steam Coal | 75 MW | 75 MW | 1997 | Operating |
| GEN2 | Conventional Steam Coal | 31 MW | 31 MW | 1987 | Operating |
| GEN3 | Conventional Steam Coal | 31 MW | 31 MW | 1987 | Operating |
| GEN4 | Conventional Steam Coal | 31 MW | 31 MW | 1987 | Operating |
| GEN5 | Conventional Steam Coal | 31 MW | 31 MW | 1987 | Operating |
| GEN6 | Conventional Steam Coal | 31 MW | 31 MW | 1994 | 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
| Crete Energy Venture LLC | Natural gas | 356 MW |
| University Park South | Natural gas | 353 MW |
| NRG Rockford I | Natural gas | 316 MW |
| Calumet Energy Team LLC | Natural gas | 313 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 335 MW solar plant and a 335 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