Prairie State Generating Station
Prairie State Generating Station is a 2 GW coal power plant in St Clair County, Illinois, operated by Prairie State Generating Co LLC. EIA-860M lists 2 generating units here, inside MISO. Its units entered service in 2012.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 1,766 MW
- 1,630 MW net summer
- Generating units
- 2
- In service
- 2012
- EIA plant ID
- 55856
Where it is
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- County
- St Clair County, Illinois
- Coordinates
- 38.2792, -89.6669
- Balancing authority
- MISO
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- Prairie State Generating Co LLC
- Primary energy source
- Coal
- Technologies
- Conventional Steam Coal
- Status
- Operating
Every plant Prairie State Generating Co LLC reports to EIA →
Prairie State Generating Station: FAQ
- Where is Prairie State Generating Station?
- In St Clair County, Illinois (IL). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Prairie State Generating Station?
- 2 GW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
- Who owns Prairie State Generating Station?
- EIA-860M names Prairie State Generating Co LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Prairie State Generating Station LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Prairie State Generating Co LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Prairie State Generating Station LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Prairie State Generating Station still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.