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Preliminary 2025 facility recordOperating

Big Stone City, SD · EIA plant 6098

Big Stone

Big Stone is a coal power facility in Big Stone City, SD, with 451 MW of operating capacity.

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Operating capacity451 MW2 operating generators
Proposed capacity0 MW0 proposed generators
UtilityOtter Tail Power CoEIA-reported operator
Balancing authorityMISOMidcontinent Independent Transmission System Operator, Inc..

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Coal450 MW
Oil & gas1 MW
ProposedNo proposed capacity reported
Reported technologiesConventional Steam CoalPetroleum Liquids

Nearby in SD

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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