Nameplate capacity
34 MW
Rank in Illinois
#139
of 580 plants
In service since
1957
July 1957
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Internal Combustion Engine
- Operator
- City of Geneseo - (IL)
- County
- Henry County
- Generating units
- 11
- Share of state capacity
- 0.06%
- Rank among natural gas plants in Illinois
- #42 of 72
- EIA plant code
- 944
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Natural Gas Internal Combustion Engine | 5.6 MW | 4.4 MW | 1974 | Operating |
| 9 | Petroleum Liquids | 4.8 MW | 3.8 MW | 1998 | Operating |
| 5A | Natural Gas Internal Combustion Engine | 4.4 MW | 3.4 MW | 1990 | Operating |
| 2 | Natural Gas Internal Combustion Engine | 3.5 MW | 2.8 MW | 1967 | Operating |
| 3 | Natural Gas Internal Combustion Engine | 3.5 MW | 2.8 MW | 1966 | Operating |
| 6A | Natural Gas Internal Combustion Engine | 3.0 MW | 2.4 MW | 2003 | Operating |
| 7 | Natural Gas Internal Combustion Engine | 3.0 MW | 2.4 MW | 1961 | Operating |
| 4 | Natural Gas Internal Combustion Engine | 1.6 MW | 1.3 MW | 1957 | Operating |
| 10 | Onshore Wind Turbine | 1.5 MW | 1.5 MW | 2009 | Operating |
| 11 | Onshore Wind Turbine | 1.5 MW | 1.5 MW | 2009 | Operating |
| 12 | Solar Photovoltaic | 1.2 MW | 0.9 MW | 2015 | 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
| Earp Solar, LLC | Solar | 35 MW |
| Richland Township Solar, LLC | Solar | 35 MW |
| Winnetka | Natural gas | 33 MW |
| Prairie Creek Solar | Solar | 30 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 34 MW solar plant and a 34 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