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.
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 Stibnite is already taking shape. Over the past several years, early cleanup work has addressed some of the most pressing legacy impacts.