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Unpacking the Stibnite Mine Project - Part VI: Understanding Perpetua

Perpetua Resources mining company has proposed to reopen a mining site near McCall Idaho to mine gold and antimony. This incredibly complex project has caught the attention of grassroots and state organizations worried about the impacts of the proposed mine on Idaho’s environment and socio-economic culture. Now in part six of unpacking this complex project, Jessa and Emma invite Perpetua Resources Vice President of External Affairs, Mckinsey Lyon, to explain why Perpetua is proposing to reopen the Stibnite abandoned mine site.

The proposed Stibnite Mine is a huge proposed project. The affected area includes approximately 7 square miles of public land. The mine is mostly in the Payette National Forest, at the headwaters and the East Fork and the South Fork of the Salmon River. Three fish in this vital river, Chinook salmon, Steelhead, and Bull trout on the endangered species list. The mine will impact this river by degrading water quality and causing death to these endangered species. This is only one of the many potentially devastating environmental impacts of the project. The question therefore remains: why would a mine like this be worth the possible environmental degradation? Turns out, we rely on mined minerals every single day. Therefore, mining is not an inescapable evil, but perhaps with the right company it can be done responsibly and the land can recover after…

Perpetua’s deep-dive into the project:

A SEIS letter from prominent Yellowpine resident, Willie Sullivan (who we will hear on the show in a couple weeks!) to the Forest Service:

A SEIS letter from Alliance for Innovation and Infrastructure to the Forest Service:

A SEIS letter from Bryan Ulrich, the reviewer of the Stibnite Tailings Facility, to the Forest Service:

A SEIS letter from school district 422 to the Forest Service: book/86292/240420

A SEIS letter from Cecilia K. Tyler, Colonel, U.S. Army Retired, and McCall resident to the Forest Service:

A SEIS letter from the city of Cascade to the Forest Service: book/86292/240425

A SEIS letter from the city of Donnelly to the Forest Service: book/86292/240527

A SEIS letter from Diamond Fuel and Feed Team to the Forest Service: book/86292/240528

A SEIS letter from Idaho Recreational Council to the Forest Service: book/86292/240532

A SEIS letter from Regeneration, a company that turns legacy sites into environmental and community assets, to the Forest Service:

For comments, topic suggestions, or more information, please reach out to Jessa at and Emma at

Jessa is in her final year of her undergraduate career, pursuing three majors: English with Creative Writing, History, and Global Studies with an emphasis in French Language and Literature. She is a published author through ISU's Black Rock & Sage literary magazine and hopes to join the Sustainability Club at ISU. Her sustainability journey began with her year abroad when she interned for Letters to the Earth, an organization dedicated to environmental sustainability. She hopes to work for Amnesty International until she can write books in the mountains full time.