South Main Street
Natural gas power plant · Ogle County, Illinois
Nameplate capacity
16 MW
Rank in Illinois
#158
of 580 plants
In service since
1967
September 1967
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Internal Combustion Engine
- Operator
- Rochelle Municipal Utilities
- County
- Ogle County
- Generating units
- 8
- Share of state capacity
- 0.03%
- Rank among natural gas plants in Illinois
- #47 of 72
- EIA plant code
- 961
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Natural Gas Internal Combustion Engine | 2.5 MW | 1.6 MW | 1967 | Standby/Backup: available for service but not normally used |
| 2 | Natural Gas Internal Combustion Engine | 2.5 MW | 2.0 MW | 1967 | Standby/Backup: available for service but not normally used |
| 13 | Petroleum Liquids | 1.8 MW | 1.8 MW | 2014 | Standby/Backup: available for service but not normally used |
| 14 | Petroleum Liquids | 1.8 MW | 1.8 MW | 2014 | Standby/Backup: available for service but not normally used |
| 15 | Petroleum Liquids | 1.8 MW | 1.8 MW | 2014 | Standby/Backup: available for service but not normally used |
| 16 | Petroleum Liquids | 1.8 MW | 1.8 MW | 2016 | Operating |
| 17 | Petroleum Liquids | 1.8 MW | 1.8 MW | 2016 | Operating |
| 18 | Petroleum Liquids | 1.8 MW | 1.8 MW | 2016 | 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
| Lockport Powerhouse | Hydro | 16 MW |
| Freeburg | Other | 16 MW |
| Livingston Generating Facility | Other | 15 MW |
| Red Bud | Other | 15 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 16 MW solar plant and a 16 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