8-K: Royal Gold's Mount Milligan Mine Life Extended to 2045

Royal Gold reports a significant 10-year mine life extension for its largest stream interest, Mount Milligan, to 2045, with potential for increased throughput.

Summary

• Centerra Gold Inc.'s pre-feasibility study (PFS) confirms a life of mine (LOM) extension for the Mount Milligan mine by approximately 10 years, now projected to 2045.
• The study indicates potential to increase the process plant throughput by approximately 10% in 2029, from 60,000 tonnes per day (tpd) to 66,300 tpd.
• Flotation capacity is also expected to increase, which should deliver a modest improvement in gold and copper recoveries of about 1%.
• Average annual production from 2026 to 2042 is expected to be approximately 150,000 ounces of gold and 69 million pounds of copper, followed by processing low-grade stockpiles from 2043 to 2045.
• Updated proven and probable mineral reserves total 483.2 million tonnes, with an average grade of 0.28 grams per tonne (g/t) gold and 0.16% copper, containing 4.4 million ounces of gold and 1.7 billion pounds of copper.
• This represents a 56% increase from the 2.8 million ounces of gold reserves and a 52% increase from the 1.2 billion pounds of copper reserves reported at the end of 2024.
• A second tailings storage facility (TSF) will be constructed in the first half of the 2030s, with its footprint designed to accommodate future lifts for potential further LOM extensions.
• Royal Gold's Cost Support Agreement with Centerra, entered into in early 2024, was instrumental in unlocking the potential of the Mount Milligan resource.
• Royal Gold has recovered over 150% of its advance stream deposit from Mount Milligan to date.

Sentiment

Score: 9

Explanation: The filing presents overwhelmingly positive news regarding a significant extension of mine life, substantial reserve increases, and operational improvements for Royal Gold's largest stream interest, Mount Milligan, in a stable jurisdiction. This significantly enhances the long-term value proposition for Royal Gold.

Positives

• Significant 10-year extension of Mount Milligan mine life, now projected to 2045, providing long-term asset visibility.
• Potential for further mine life extensions beyond 2045 due to ongoing exploration and flexible TSF design.
• Expected 10% increase in process plant throughput to 66,300 tpd by 2029, enhancing operational efficiency.
• Modest 1% improvement in gold and copper recoveries, contributing to increased metal output.
• Substantial increase in proven and probable mineral reserves: 56% for gold (to 4.4 million oz) and 52% for copper (to 1.7 billion lbs), indicating robust resource conversion.
• Consistent average annual production forecast of 150,000 ounces of gold and 69 million pounds of copper from 2026 to 2042.
• Mount Milligan is Royal Gold's largest stream interest, located in British Columbia, a stable and mining-friendly jurisdiction.
• Royal Gold has already recovered over 150% of its advance stream deposit, demonstrating strong returns on investment.
• Streamlined path for permitting, with key permit amendment application submitted in March 2025 and a decision expected in the first half of 2026.

Negatives

• NA

Risks

• Changes in the price of gold, copper, or other metals.
• Operating activities or financial performance of the Mount Milligan mine, including variations between actual and forecasted performance.
• Ability to complete projects on schedule and as planned, such as the TSF construction or throughput upgrades.
• Changes to mine plans and mineral reserves and mineral resources, including updated information.
• Liquidity needs, mining and environmental hazards, labor disputes, distribution and supply chain disruptions.
• Permitting and licensing issues, other adverse government or court actions, or operational disruptions.
• Changes of control of Centerra or the Mount Milligan mine.
• Contractual issues involving the Existing Stream Agreement or Cost Support Agreement.
• Timing of deliveries of metals and Royal Gold's subsequent sales of metal.
• Risks associated with doing business in foreign countries.
• Environmental risks, including those caused by climate change.
• Potential cyber-attacks, including ransomware.
• Adverse economic and market conditions.
• Effects of health epidemics and pandemics.
• Changes in laws or regulations governing Royal Gold, operators, or operating properties.
• Changes in management and key employees.

Future Outlook

The Mount Milligan mine life is expected to be extended by approximately 10 years to 2045, with ongoing exploration highlighting potential for further expansion beyond this date. Process plant throughput is projected to increase by 10% in 2029, leading to modest improvements in gold and copper recoveries. Average annual production of 150,000 ounces of gold and 69 million pounds of copper is anticipated from 2026 to 2042, followed by processing low-grade stockpiles. Permitting for a second TSF is expected to begin in 2027, with construction planned for 2032.

Management Comments

• "We are pleased to see the results of this PFS, which confirms a significant extension to the mine life at Mount Milligan." Bill Heissenbuttel, President and CEO of Royal Gold.
• "Our Cost Support Agreement with Centerra, entered into in early 2024, was designed to help Centerra unlock the potential of the large resource at Mount Milligan and add long term value for each company's stakeholders, which is clearly demonstrated with the results of this study." Bill Heissenbuttel.
• "Mount Milligan is our largest stream interest and we have recovered over 150% of our advance stream deposit to date. With the mine life expected to continue for another 20 years and the potential for further extensions, Royal Gold has another significant interest on a long-life mine in a stable and mining-friendly jurisdiction." Bill Heissenbuttel.

Industry Context

This announcement underscores the strategic importance of securing long-life, high-quality assets in stable mining jurisdictions, a key trend for precious metals streaming and royalty companies. The extension of Mount Milligan's mine life and increased reserves provide Royal Gold with enhanced long-term cash flow visibility and reduced operational risk, aligning with industry efforts to maximize value from existing assets through resource conversion and operational optimization. The focus on British Columbia highlights the continued attractiveness of politically stable regions for mining investment.

Comparison to Industry Standards

• While the filing does not name specific comparable companies or projects, the significant extension of mine life to 2045 (20 years from the report date) and substantial reserve increases (56% for gold, 52% for copper) are generally considered strong indicators of asset quality and longevity within the precious metals streaming and royalty sector.
• Companies like Franco-Nevada, Wheaton Precious Metals, and Osisko Gold Royalties also prioritize long-life, low-cost assets in favorable jurisdictions.
• The Mount Milligan asset, being Royal Gold's largest stream interest, now offers a competitive long-term production profile, enhancing Royal Gold's portfolio stability compared to peers who might have a higher proportion of shorter-life assets or assets in higher-risk regions.

Stakeholder Impact

• Shareholders: Expected increased long-term value, enhanced cash flow visibility, and reduced operational risk due to extended mine life and significantly increased reserves.
• Centerra Gold (Operator): Validation of investment in Mount Milligan, successful unlocking of resource potential, and improved operational outlook.
• Employees: Enhanced job security and continuity at Mount Milligan due to extended operations.
• Local Communities: Continued economic activity and employment opportunities in British Columbia for an extended period.

Next Steps

• Regulators to decide on Centerra's permit amendment application for operations extension through 2035 and throughput expansion (expected H1 2026).
• Permitting activities for a second TSF and other required authorizations to begin in 2027.
• Construction of the second TSF planned for 2032.
• Ongoing exploration to further expand mineral resources and extend mine life beyond 2045.
• Upgrade of ball mill motors and increase in flotation capacity by 2029 to achieve higher throughput and recoveries.

Key Dates

Recommendation

The pre-feasibility study results for Mount Milligan are exceptionally positive, confirming a 10-year mine life extension to 2045, a 56% increase in gold reserves, and a 52% increase in copper reserves. This significantly de-risks Royal Gold's largest stream interest and provides substantial long-term cash flow visibility from a stable jurisdiction. The planned throughput increase and recovery improvements further enhance the asset's value. Given Royal Gold's already strong position and the favorable terms of its stream agreements, this announcement represents a material positive catalyst that should drive significant shareholder value and warrants a 'strong buy' recommendation.

Keywords

Royal Gold, RGLD, Centerra Gold, Mount Milligan, mine life extension, pre-feasibility study, PFS, gold stream, copper stream, mineral reserves, production forecast, mining, British Columbia, precious metals, royalties, throughput increase