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1766 MW Bit. Coal operating in St Clair, IL — Midcontinent Independent Transmission System Operator, Inc..
1,766 MW
Nameplate Capacity
2
Generators
units
Conventional Steam Coal
Technology
2012
Operating Since
Coordinates
38.2792, -89.6669
County
St Clair, IL
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Prairie State Generating Co LLC | Indiana Municipal Power Agency | — |
| Owner(s) | American Mun Power-Ohio, Inc, Illinois Municipal Elec Agency, Indiana Municipal Power Agency, Kentucky Municipal Power Agency, Lively Grove Energy Partners LLC, Missouri Jnt Muni.Pwr Elec. Ut. Comm., Northern Illinois Municipal Power Agency, Prairie Power Inc, Southern Illinois Power Coop, Wabash Valley Power Assn, Inc | Indiana Municipal Power Agency | — |
| Status | Operating | — | — |
Prairie State Energy Campus is a 1,600 megawatt base load, coal-fired, electrical power station and coal mine near Marissa, Illinois, southeast of St. Louis, Missouri. Prairie State Energy Campus (PSEC) features low levels of regulated emissions compared to other coal-fired power stations, capturing sulfur from high-sulfur coal mined nearby instead of transporting low-sulfur coal from elsewhere.
Read more on WikipediaPrairie State Generating Station is a 1,766 MW coal-fired power plant located in St. Clair County, Illinois. The plant, which began operating in 2012, is owned by Indiana Municipal Power Agency and operated by Prairie State Generating Co LLC. It utilizes conventional steam coal technology and consists of two generators. Prairie State is the largest of four coal plants in Illinois, and ranks 12th out of 50 coal plants nationally.
The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the SERC NERC region. In the latest year of available data, Prairie State Generating Station produced 12,192,564 MWh of electricity, achieving a capacity factor of 78.8%. The installed cost of the plant was $613.78 per kW, according to FERC data.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
345.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Municipal
Sector
IPP Non-CHP
1.2M MWh
Latest Month
12.2M MWh
Annual Generation
78.8%
Capacity Factor
CO₂ Intensity
1992 lb/MWh
NOx
0.629 lb/MWh
SO₂
1 lb/MWh
CH₄
0.230 lb/MWh
N₂O
0.033 lb/MWh
Capacity Factor
80.7%
Annual Net Gen
12483 GWh
CO₂eq
2007 lb/MWh
Subregion
SERC Midwest
Internal combustion · Wabash Valley Power Association, Inc. · Data from 2016–2024
$665/kW
Installed Cost
$6/kW
Annual CapEx
$30.0/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Market Position
ISO/RTO Market
MISO
LMP Node
AMIL.PSGC1
Pricing Hub
ILLINOIS.HUB
Node Source
EIA-860 direct report
Last updated 2026-03-26
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