Nameplate capacity
7.2 MW
Rank in Illinois
#178
of 580 plants
In service since
2002
January 2002
Details
- Primary fuel
- Other
- Technology
- Petroleum Liquids
- Operator
- City of Altamont - (IL)
- County
- Effingham County
- Generating units
- 4
- Share of state capacity
- 0.01%
- Rank among other plants in Illinois
- #22 of 45
- EIA plant code
- 7990
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Petroleum Liquids | 1.8 MW | 1.8 MW | 2002 | Standby/Backup: available for service but not normally used |
| 2 | Petroleum Liquids | 1.8 MW | 1.8 MW | 2002 | Standby/Backup: available for service but not normally used |
| 3 | Petroleum Liquids | 1.8 MW | 1.8 MW | 2002 | Standby/Backup: available for service but not normally used |
| 4 | Petroleum Liquids | 1.8 MW | 1.8 MW | 2006 | Standby/Backup: available for service but not normally used |
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
| Agriwind | Wind | 8.4 MW |
| City of Peru Hydro-Electric Generating S | Hydro | 7.6 MW |
| Hoffer Plastics | Natural gas | 7.2 MW |
| Yeoman Creek | Solar | 7.0 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 7.2 MW solar plant and a 7.2 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