Air Quality | NorthWestern Energy-Yellowstone County Generating Station

The Department of Environmental Quality has prepared a Department Decision (DD) regarding Operating Permit #OP5261-00, for NorthWestern Energy-Yellowstone County Generating Station.

 Location:

• 45.65973 latitude, -108.74620 longitude
• Yellowstone County

Associated Materials:

• OP5261-00
• TRD5261-00

Facility Appeal Period Ends: 

• May 14, 2026 11:59pm

Contact: Craig Henrikson

---

Tags: Air and Public Notice