Ninth Circuit Thwarts Attempt to Halt Copper Mine on Apache Land

Why It Matters

The decision clears a major legal obstacle for one of the nation’s largest copper projects while underscoring limits on tribal and environmental challenges to federal land transfers. It signals how courts may treat future religious‑freedom and NEPA claims against resource development.

Key Takeaways

• Ninth Circuit upholds land transfer for Resolution Copper.
• Court says NEPA analysis satisfied, alternatives infeasible.
• Prior Apache Stronghold rulings block new religious claims.
• Oak Flat sacred site and endangered habitats face destruction.
• Future appeal may reach Supreme Court, but odds low.

Pulse Analysis

The Oak Flat controversy traces back to the 2014 Southeast Arizona Land Exchange and Conservation Act, a rider hidden in a defense bill that authorized the swap of federal forest land for a copper mining lease. Resolution Copper, a joint venture of two multinational miners, stands to extract more than 2 billion pounds of copper, a critical input for electric‑vehicle batteries and renewable‑energy infrastructure. By securing the land, the company moves closer to a $30 billion development that promises jobs and tax revenue for Arizona, while also raising questions about the use of legislative riders to advance private resource extraction.

In the appellate ruling, the judges focused on procedural compliance rather than substantive cultural harm. They concluded the Forest Service had completed a thorough NEPA review, considered alternatives, and engaged in two decades of tribal consultation, even if the consultation was deemed insufficient by the plaintiffs. The court also distinguished the case from the Supreme Court’s *Mamhoud v. Taylor* decision, noting that the precedent dealt with educational settings, not land‑use actions, and therefore did not overturn the earlier *Apache Stronghold* holdings that limited religious‑freedom challenges to federal land exchanges.

The outcome reverberates beyond Arizona. It illustrates the high bar for Native American groups to block projects that have secured congressional approval, potentially dampening future litigation that seeks to protect sacred sites or endangered species under NEPA or the Religious Freedom Restoration Act. For the mining sector, the decision provides a clearer path forward for large‑scale copper projects essential to the green‑energy transition, while environmental advocates warn that the precedent may marginalize tribal voices in future land‑use disputes.