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Coal power plants in Montana

4 operating coal power plants in Montana with 1,811 MW of coal capacity, largest first. From EIA-860M, August 2026.

Plants

4

Coal capacity

1,811 MW

Net generation, 2025

9.63 TWh

Largest

Colstrip

1,647 MW

Largest coal power plants in Montana

#PlantCoal MW2025 net generation, GWhGWh, 2025Capacity factorOperator
1ColstripRosebud County1,6479,17163.6%Talen Montana LLC
2Hardin Generator ProjectBig Horn County11617817.6%Heorot Power Management
3Colstrip Energy LPRosebud County4627868.7%Colstrip Energy LP
4Western Sugar Cooperative - BillingsYellowstone County1.53.022.6%Western Sugar Cooperative - Billings

Projects where coal is the largest fuel or at least a fifth of nameplate capacity. MW is coal nameplate only; net generation covers the whole project. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources

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