NRG Rockford I is a natural gas-fired power facility with 316 MW of EIA-reported nameplate capacity in Winnebago County, Illinois, registered as EIA Plant ID 55238.
Mapped infrastructure geometry associated with this asset.
Natural Gas Fired Combustion Turbine
NRG Rockford I is currently operating; a closure or retirement is listed for June 1, 2026.
PJM
PJM · Winnebago County
EIA plant 55238 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| 0001 | Natural Gas Fired Combustion Turbine | Operating | 158 | Unknown |
| 0002 | Natural Gas Fired Combustion Turbine | Operating | 158 | Unknown |
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Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 0001 | 158 MW 181.5 MW summer | Natural Gas Fired Combustion Turbine GT | Jun 2000 | Operating |
| 0002 | 158 MW 180.7 MW summer | Natural Gas Fired Combustion Turbine GT | Jun 2000 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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| Largest reported plants | Capacity | State | |
|---|---|---|---|
| NRG Rockford ICurrent | 316 MW | IL | |
| NRG Rockford II Energy Center | 168 MW | IL |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioProject milestones and public references behind the asset profile.
Construction of the Rockford Peaking Project began in late January 2000. The project comprised two simple-cycle Siemens-Westinghouse V-84.3a combustion turbines and was developed for Indeck Energy Services.
Gemma Power Systems reported substantial completion in June 2000, and the Rockford I generating-station profile identifies June 2000 as the commissioning month.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
NRG Rockford I reports 316 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
NRG Rockford I is a Natural Gas Fired Combustion Turbine facility in Winnebago County, IL, participating in the PJM market.
NRG Rockford I is in Winnebago County, IL, inside the PJM balancing area.
NRG Rockford I is operated by Rockford Generation LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
NRG Rockford I reported 80.3 GWh over the twelve months to 2024-12. Figures are net generation as filed to EIA-923.
By capacity, NRG Rockford I ranks #177 of 829 operating plants of the same technology nationally. It ranks #17 of 37 in IL.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
