Perpetua Resources Corp. has made progress on its Stibnite Gold Project in central Idaho, with construction advancing on key components including dual autoclaves for the processing facility and modular worker housing units.
Fabrication of the dual autoclaves is underway in Europe, while approximately half of the modular housing units supplied by ATCO have been delivered to the site as of August 24. The remaining units are staged 75 miles away in Cascade, Idaho. The project remains on track for final federal approval, which was granted in 2025 despite ongoing legal challenges.
Drilling operations continue to yield positive results. Four rigs are active at the site, having completed roughly 5,800 meters of a planned 10,000-meter program. Recent intercepts include 6.4 meters grading 16.2 grams per ton of gold and 1.7% antimony at surface level, and 15.0 meters grading 6.3 grams per ton of gold and 0.8% antimony from an 11-meter depth. A gold-tungsten discovery yielded 21.3 meters grading 3.2 grams per ton of gold and 0.9% tungsten from a 24-meter depth, while the Hangar Flats zone returned 22.9 meters of 3.2% antimony and 1.2% tungsten.
Legal proceedings have seen the U.S. District Court of Idaho uphold federal approvals for the project on August 18, rejecting challenges under the National Environmental Policy Act, General Mining Law, and National Forest Management Act. The court remanded the matter to the U.S. Fish and Wildlife Service for clarification of monitoring and reporting measures in Incidental Take Statements. Plaintiffs have since filed an appeal.
The company has also secured government partnerships, including a modular mineral processing plant opened in Idaho Falls on July 29 with the U.S. Army and Idaho National Laboratory to process antimony samples into antimony trisulfide for military applications. Since 2022, Perpetua Resources has received over $87 million in funding from the U.S. Department of Defense and U.S. Army.
