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Preliminary 2025 facility recordOperating

Marissa, IL · EIA plant 55856

Prairie State Generating Station

Prairie State Generating Station is a coal power facility in Marissa, IL, with 1,766 MW of operating capacity.

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Operating capacity1,766 MW2 operating generators
Proposed capacity0 MW0 proposed generators
UtilityPrairie State Generating Co LLCEIA-reported operator
Balancing authorityMISOMidcontinent Independent Transmission System Operator, Inc..

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Coal1,766 MW
ProposedNo proposed capacity reported
Reported technologiesConventional Steam Coal

Nearby in IL

Related facilities

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Source quality

Preliminary facility data

This page uses the EIA-860 2025 Early Release. EIA identifies the release as preliminary, so it should not be used for official state or national aggregation. Capacity is nameplate capacity, not real-time output or annual generation.

Read methodologyEIA-860 source