Technical Project Documents

Perpetua Resources has been studying the Stibnite Mining District for more than a decade. In 2014, we published our Pre-Feasibility Study (PFS) to the U.S. Forest Service. This document was foundational in helping our team develop our Plan of Restoration and Operations (PRO), which we submitted to regulators in 2016. Once we submitted the PRO we continued to study the site and found ways to improve our project. The public was able to review our refinements when the Draft Environmental Impact Statement (DEIS) was published in 2020, they were included as Alternative 2 in the document.

Nearly 10,000 people commented on the DEIS. Our team reviewed all of the public feedback and used it to identify further improvements to our plans. Near the start of 2021, we revised our preferred alternative, which is now referred to a Refined Alternative 2, and shared those improvements with the U.S. Forest Service.

All of these technical documents are available for your review below. Perpetua Resources has also created summary documents highlighting some of the most important aspects of our plans, those are available for review on our Fact Sheets and Reports page.

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