NPDES Permit for Westmoreland Absaloka Mining LLC Absaloka Mine South Extension in Montana

Under National Pollutant Discharge Elimination System permit number MT-0030783, Westmoreland Absaloka Mining, LLC is authorized to discharge mine drainage from 24 outfalls associated with the Absaloka Mine South Extension near Hardin, Big Horn County, Montana, on the Crow Indian Reservation to the Middle Fork Sarpy Creek, unnamed tributaries to Middle Fork Sarpy Creek, and to unnamed tributaries to Sarpy Creek.

Current Permit

• MT0030783 Absaloka South Mine Extension NPDES Permit (pdf) (438.98 KB, October 27, 2023)
  The signed NPDES discharge permit.
• MT-0030783 Absaloka Mine South Extension Permit 508 Compliant (pdf) (448.6 KB, October 27, 2023)
  An unsigned version of the NPDES discharge permit that includes bookmarks.
• MT-0030783 Absaloka Mine South Extension Statement of Basis (pdf) (1005.89 KB, October 27, 2023)
  The statement of basis for the NPDES discharge permit.