Rio Tinto has approved $144 million of further spending at the Resolution Copper project in Arizona, of which its share is $79 million. The money funds studies, equipment and water treatment, but no decision has been made to start mining.
At a glance
- The spending adds to about $500 million announced when the land exchange was completed in March.
- Rio owns 55% of the venture, and BHP holds the rest.
- The partners still face state and local permitting, and opposition over the sacred Apache site at Oak Flat.
Background
Resolution Copper is a proposed underground mine near Superior, Arizona, with the deposit lying about 1,500 to 2,100 metres deep. A land exchange completed on March 16 gave the venture more than 2,400 acres near Superior. The San Carlos Apache Tribe and others oppose the project, because underground mining would cause the land above at Oak Flat to subside.
What happened
Rio Tinto approved $144 million of additional spending at Resolution Copper on Thursday, The Northern Miner and International Mining reported. Rio's share is $79 million, and it owns 55% of the venture alongside BHP.
The money adds to about $500 million of preliminary spending announced in March. It will create about 50 jobs.
What the money pays for
The programme funds feasibility studies and final design engineering for material-handling equipment in both shafts and for new water treatment plants. It also covers exploration drilling and the purchase of underground and long-lead electrical equipment.
Rio's copper chief executive Katie Jackson said Resolution could supply up to 25% of America's copper demand for decades. She said the funds would help position it for its next investment decision.
What stands in the way
No decision has been made to begin mining, Resolution Copper says. The partners still need state and local permits and more technical work.
The San Carlos Apache Tribe, Apache Stronghold and others are challenging the project over Oak Flat, a site used for religious ceremonies. The Ninth Circuit Court of Appeals denied rehearing petitions on September 29 concerning an earlier refusal to block the land exchange.
Our read
Outlook: neutral. Resolution is years from production, and no mining decision has been made.
What to watch
- Rio Tinto and BHP's next investment decision on Resolution.
- State and local permitting in Arizona.
- Further legal challenges over Oak Flat.
For information only, not investment advice.
Copper price in India
metalscost.com India reference price as of 2026-11-10.
Detailed analysis
Timeline
- 2026-03-16: The Resolution Copper land exchange is completed.
- 2026-09-29: The Ninth Circuit denies rehearing petitions over the exchange.
- 2026-11-05: Rio Tinto approves $144 million of further spending.
Supply Drivers
Resolution could supply up to 25% of US copper demand, Rio says, but no mining decision has been made.
Government Policies
The project still needs state and local permits after the federal land exchange.
What could lift prices
- Resolution is years from production, so it adds no near-term supply.
- Permits and legal challenges could delay the project.
What could weigh on prices
- Resolution could supply up to 25% of US copper demand, Rio says.
- The partners are spending more to advance the project.
Country impact
| Country | Impact | Reason |
|---|---|---|
| United States | High | Resolution would be a major new source of US copper. |
Industry impact
| Industry | Effect | Reason |
|---|---|---|
| Copper Mining | Positive | Rio and BHP are funding the next phase of a large US copper project. |
Who gains, who loses
- Arizona's economy: The venture estimates the mine could add about $1 billion a year.
- The San Carlos Apache Tribe: Underground mining would cause Oak Flat, a sacred site, to subside.
Other ways this could play out
- If permits and studies go well, the partners could move to their next investment decision.
- If legal or permitting delays grow, the project could slip further.
Price risks
- A final decision to build would add long-term US copper supply.
- Legal challenges over Oak Flat could continue.
Technical view
Price is trading below both its 20-period and 50-period moving averages, a bearish alignment.
Computed from metalscost.com's own stored price history.
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United States