NRG Rockford I
Natural gas power plant · Winnebago County, Illinois
Nameplate capacity
316 MW
Rank in Illinois
#37
of 580 plants
In service since
2000
June 2000
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combustion Turbine
- Operator
- Rockford Generation LLC
- County
- Winnebago County
- Generating units
- 2
- Share of state capacity
- 0.60%
- Rank among natural gas plants in Illinois
- #24 of 72
- EIA plant code
- 55238
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 0001 | Natural Gas Fired Combustion Turbine | 158 MW | 182 MW | 2000 | Operating |
| 0002 | Natural Gas Fired Combustion Turbine | 158 MW | 181 MW | 2000 | 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
| University Park South | Natural gas | 353 MW |
| Archer Daniels Midland Decatur | Coal | 335 MW |
| Calumet Energy Team LLC | Natural gas | 313 MW |
| Lincoln Land Wind | Wind | 302 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 316 MW solar plant and a 316 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