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NPDES Permit for Midnite Mine in Washington

Below are EPA's National Pollutant Discharge Elimination System (NPDES) final permit and supporting documents for the Dawn Mining Company Midnite Mine discharging to the Spokane Arm of Lake Roosevelt on the Spokane Indian Reservation in eastern Washington.

Permit number: WA0026841
Effective date: January 1, 2019
Permit expires: December 31, 2023

NPDES Permit, Midnite Mine, #WA0026841 (pdf) (278.83 KB, November 15, 2017)
Final permit.
NPDES Permit Fact Sheet, Midnite Mine, #WA0026841 (pdf) (1.11 MB, April 2017)
Provides technical basis for NPDES permit.
Response to Comments, Midnite Mine NPDES Permit, #WA0026841 (pdf) (72.17 KB, November 2017)
EPA's responses to public comments on the April 2017 draft NPDES permit.