Query
Prairie State Generating Station
Type
Entity Briefing
Entity
Prairie State Generating Station
Generated
2026-10-08T23:56:30.899Z

Briefing on Prairie State Generating Station

Entity Briefing
Generated Oct 8, 2026·Dataset freshness not reported
1.8 GW
Capacity
Operating
Current status
2012
Operating since
2
Generators
78.8%
Capacity factor
12193 GWh
Annual generation
Briefing/plantOperating

Prairie State Generating Station is a 1.8 GW Conventional Steam Coal asset in MISO (Midcontinent), currently Operating.

Prairie State Generating Station is reported in Illinois since 2012 under Indiana Municipal Power Agency. Available operating and financial measures include 78.8% capacity factor and 12193 GWh annual generation; $665/kW reported CapEx.

Location
St Clair, Illinois
Technology
Conventional Steam Coal
Owner / parent
Indiana Municipal Power Agency
Operator
Prairie State Generating Co LLC
Grid
MISO (Midcontinent)
Plant ID
55856

What stands out

1

Prairie State Generating Station is a 1.8 GW Conventional Steam Coal asset in Illinois with status Operating.

2

Latest annual operating measures report 78.8% capacity factor and 12193 GWh annual generation.

3

Available financial measures include $30.0/MWh OpEx, $665/kW CapEx.

4

Latest linked story: “New law sets end dates for fossil-fuel power plants, but Illinois coal mining remains a huge contributor to climate-changing pollution” (Chicago Tribune, 2021-09-17).

Market and operating context

ISO / market
MISO (Midcontinent)
Balancing authority
Midcontinent Independent Transmission System Operator, Inc..
NERC region
SERC
State rank
#1 of 4
National rank
#16 of 66

Why it matters

For this asset in MISO (Midcontinent), operating status, generation, ownership, and linked events are the primary facts for performance and asset-level diligence. The exact chart and source-linked records below let the reader test those facts before moving to a deeper report.