Interview with Stephen Twyerould, President & CEO of Gunnison Copper

Recording date: 25th August 2025

Gunnison Copper (TSX:MIN) is set to begin copper cathode production in September 2025 through its Johnson Camp mine in southeast Arizona. This near-term production is enabled by an innovative partnership with Nuton LLC, a Rio Tinto venture, which has invested over $100 million to finance construction and provide advanced sulfide leaching technology. The Johnson Camp facility is designed to reach an annual production capacity of 25 million pounds of copper by mid-2026. Gunnison retains 100% ownership and operational control, with the partnership structured to repay Nuton's investment over a 4-5 year period before Gunnison obtains full profit rights.

Beyond immediate production, the company benefits from Nuton’s technical expertise, gaining valuable knowledge in sulfide leaching technology that can be applied to its larger Gunnison open pit project. The Gunnison project, which completed a Preliminary Economic Assessment in late 2024, showcases robust economics with a post-tax net present value (NPV) of $1.3 billion, an internal rate of return near 21%, and a production profile of 170 million pounds annually over 18 years. This large open pit operation primarily processes oxide copper with an all-in sustaining cost of approximately $1.94 per pound, providing strong cash flow potential amid current copper prices above $4.00.

Gunnison Copper is strategically positioned as a domestic US supplier, attracting government attention with $13.9 million in transferable 48C tax credits from the Department of Energy and unsolicited outreach from federal agencies emphasizing supply chain security. The company is also advancing several initiatives to enhance project economics, including byproduct valorization from gravel and limestone—currently accounted at zero value—and mineral sorting technologies aimed at reducing operating costs.

With an established regulatory framework, proximity to rail infrastructure, and a clear timeline to prefeasibility studies in 2026, Gunnison Copper exemplifies a junior miner transitioning to production with a de-risked development path and strong strategic alliances in place, addressing both near-term outputs and long-term growth potential in the US copper market.

View Gunnison Copper's company profile: https://www.cruxinvestor.com/companies/gunnison-copper

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