McLeansboro
Other power plant · Hamilton County, Illinois
Nameplate capacity
6.1 MW
Rank in Illinois
#184
of 580 plants
In service since
1950
December 1950
Details
- Primary fuel
- Other
- Technology
- Petroleum Liquids
- Operator
- City of McLeansboro - (IL)
- County
- Hamilton County
- Generating units
- 4
- Share of state capacity
- 0.01%
- Rank among other plants in Illinois
- #24 of 45
- EIA plant code
- 948
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 6 | Petroleum Liquids | 2.4 MW | 2.2 MW | 1979 | Standby/Backup: available for service but not normally used |
| 5 | Petroleum Liquids | 2.0 MW | 1.8 MW | 1979 | Standby/Backup: available for service but not normally used |
| 7 | Petroleum Liquids | 1.1 MW | 1.0 MW | 1995 | Standby/Backup: available for service but not normally used |
| 2 | Petroleum Liquids | 0.6 MW | 0.4 MW | 1950 | Out of service and NOT expected to return to service in next calendar year |
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
| Greene Valley Gas Recovery | Other | 6.6 MW |
| Argonne National Laboratory CHP | Natural gas | 6.3 MW |
| Charter Dura-Bar | Natural gas | 6.0 MW |
| Lake Gas Recovery | Other | 6.0 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 6.1 MW solar plant and a 6.1 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