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NPDES Permit for Hecla Grouse Creek Unit in Idaho

Transfer of permitting authority to Idaho. As of July 1, 2019, EPA has transferred authority to administer and enforce this permit to the Idaho Department of Environmental Quality. For more information, visit Idaho Pollutant Discharge Elimination System (IPDES) Program.

Below are EPA's National Pollutant Discharge Elimination System (NPDES) permit and supporting documents for the Hecla Limited Grouse Creek Unit near Stanley, Idaho.

Permit number: ID0026468
Effective date: December 1, 2018
Modified: August 1, 2019
Permit expires: November 30, 2023

NPDES Permit (Modified), Hecla Grouse Creek Unit, Idaho, #ID0026468 (pdf) (340.76 KB, May 23, 2019)
Modified final permit.
NPDES Permit Modification Fact Sheet (2019), Hecla Grouse Creek Unit, Idaho, #ID0026468 (pdf) (220.59 KB, March 2019)
Technical basis for 2019 permit modification.
Response to Comments on Draft Permit Modification for Hecla Grouse Creek Unit, Idaho, #ID0026468 (pdf) (150.04 KB, May 2019)
EPA's responses to public comments on the March 2019 draft permit modification.
NPDES Permit Fact Sheet (Revised 2016), Hecla Grouse Creek Unit, Idaho, #ID00226468 (pdf) (860.98 KB, March 2016)
Technical basis for March 2016 revised draft permit.
NPDES Permit Fact Sheet (2015), Hecla Grouse Creek Unit, Idaho, #ID0026468 (pdf) (832.88 KB, June 2015)
Technical basis for June 2015 draft permit.
Response to Comments on Draft NPDES Permits for Hecla Grouse Creek Unit, Idaho, #ID0026468 (pdf) (688.05 KB, September 2018)
EPA's responses to public comments on the 2015 draft permit and 2016 revised draft permit.