The proposed project is a collaborative effort between Idaho National Laboratory (INL) and Perpetua Resources, a private industry partner, to conduct Verification & Validation (V&V) of Perpetua's pilot plant design for processing critical minerals.
Office of NEPA Policy and Compliance
April 14, 2026
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The proposed project is a collaborative effort between Idaho National Laboratory (INL) and Perpetua Resources, a private industry partner, to conduct Verification & Validation (V&V) of Perpetua's pilot plant design for processing critical minerals. The project will test the plant's ability to produce antimony trisulfide concentrate and pyrite concentrate, two economically valuable materials, from Stibnite ore provided by Perpetua. This effort supports the U.S. goal of establishing a stable domestic supply chain for energy- and defense-critical materials.