Montana Department of Environmental Quality About Us Permitting & Operator Assistance Public Participation

Air Quality | Talen Montana LLC – Colstrip Steam Electric Station

November 19 2025

The Department of Environmental Quality has prepared a Department Decision regarding Operating Permit #OP0513-19, for Talen Montana LLC – Colstrip Steam Electric Station.

Location:

Section 2, Township North, Range 41 East
Rosebud County

Associated Materials:

OP0513-19
TRD0513-19

Facility Appeal Period Ends:

December 19, 2025 11:59pm

Contact: Conor Fox

Tags: Air and Public Notice