Progress You Can Follow
Work to develop Stibnite is underway. After years of study, permitting, and preparation, the project has moved into construction, and early restoration.
Notice
Over the next few months, we are growing our team, starting early construction work at site, building the Burntlog Route, and working alongside Idaho Power to upgrade the transmission line . This means more people will be working in and around Stibnite and more vehicles will be on the roads heading up to the site. Please use extra caution and give yourself plenty of time if you are traveling to or from Yellow Pine. At times, traffic may need to be stopped or slowed, so work can be completed safely.
We recognize some of this may be an inconvenience, but we are working toward a stronger future. Our work is helping secure the critical minerals America needs for its national security and bringing environmental restoration to an area in desperate need of repair. While we are doing our best to minimize impacts on our neighbors, we recognize our work will affect you at times. Please check this page frequently for the latest updates or join one of our regularly scheduled office hours to learn more.
Location
Where Idaho Meets Opportunity
The Stibnite Gold Project is located in a remote area of central Idaho within Valley County. The site sits within a historic mining district that has been mined on and off for generations.
Mine Plan
The Stibnite Gold Project is designed to progress in phases, with mining and restoration happening side by side. As the Project moves forward, areas impacted by historical mining are addressed early, while active operations are planned in a controlled sequence. This phased approach ensures restoration is built into each phase, not delayed until the end of the Project.
From early construction through final restoration, each phase progresses toward our long-term outcome: a stable, restored site with improved environmental conditions.
Phase 1: Construction
Pre-Production & Construction
Years -3 to -1
Site preparation begins, including infrastructure development, access improvements, and environmental controls.
Phase 2: Mining & Restoration
Operations and Concurrent Restoration
Years 1 – 12
Initial mining will begin alongside early restoration work, including removal of legacy materials and building a temporary fish passageway. Mining activities for gold and antimony will include re-mining two existing legacy open pits and creating a third.
A few years into mining activity, Perpetua will begin backfilling the Yellow Pine pit and reestablish the natural flow of the river.
Phase 3: Final Restoration
Transition to Restoration-Led Phase
Years 12–Forward
Once mining winds down, restoration and closure will become the primary focus across the site. Restoration activities will include final backfill for two of the three open pits, reestablishing the natural flow of the river, and decommissioning Burntlog Road.
During final closure, it’s our job to ensure all post-mine features are stabilized and the environment is performing as expected – including water quality, vegetation regrowth, and habitat and wetlands are established.
Restoration, Realized Today
Restoration at the Stibnite site is already taking shape on the ground. Over the past several years, early cleanup work has addressed some of the most pressing legacy impacts.
$20 Million Invested in Early Restoration
Voluntary cleanup work completed in partnership with the EPA and U.S. Forest Service.
376,000 Tons of Legacy Waste Removed
Early cleanup efforts have relocated and stabilized historic tailings away from waterways, reducing a major source of contamination.
Water Quality Improvements Underway
Initial efforts have already reduced contaminant exposure in key areas of the site.