Sandfire Resources America Files Black Butte Copper Project Preliminary Feasibility Study
Sandfire’s Black Butte PFS defines a twelve-year mine life with $3.04 per pound all-in sustaining costs.
Sandfire Resources America Inc. has formally filed an independent Preliminary Feasibility Study (PFS) for its Black Butte Copper Project, updating the Johnny Lee and Lowry Deposits. The study was prepared by a team of independent consultants including DM Consulting, SRK Consulting, Entech, and INTERA. The full technical report (NI 43-101) is now publicly available on SEDAR+ and the company website. This filing serves as the administrative submission of the updated PFS previously detailed in the July 9, 2026 news release. No new financial, reserve, or production metrics are introduced in this specific announcement.
Sandfire Resources America Inc. (SFR) filed a procedural update following its substantive July 9, 2026, announcement, which previously disclosed upgraded project economics including a 12-year mine life, 14.3 Mt Probable Reserves, a $474M capital cost, and a $3.04/lb AISC. The company extended its bridge loan to December 31, 2026, providing the necessary runway to complete the Definitive Feasibility Study (DFS) and secure Lowry permits, aligning with management's stated timeline.
Sandfire Resources America Inc. is a Canadian mining development company focused on the Black Butte Copper Project in Montana, USA. The project’s flagship assets are the Johnny Lee and Lowry deposits. Johnny Lee is an underground, high-grade copper deposit targeted for mechanized long-hole stoping, while Lowry is an adjacent deposit that requires separate environmental permitting before inclusion in the mine plan. The project targets a 12-year mine life producing approximately 31,000 tonnes of contained copper annually, with an All-In Sustaining Cost (AISC) of $3.04/lb.