Clinton Power Station
Nuclear power plant · DeWitt County, Illinois
Nameplate capacity
1,138 MW
Rank in Illinois
#13
of 580 plants
In service since
1987
November 1987
Details
- Primary fuel
- Nuclear
- Technology
- Nuclear
- Operator
- Constellation Nuclear
- County
- DeWitt County
- Generating units
- 1
- Share of state capacity
- 2.16%
- Rank among nuclear plants in Illinois
- #6 of 6
- EIA plant code
- 204
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Nuclear | 1,138 MW | 1,079 MW | 1987 | 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
| Baldwin Energy Complex | Coal | 1,260 MW |
| Kendall County Generation Facility | Natural gas | 1,256 MW |
| Aurora | Natural gas | 1,086 MW |
| MPH Elwood | Natural gas | 768 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 1,138 MW solar plant and a 1,138 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