On July 7, 2026, the U.S. Forest Service issued the final Record of Decision for South32's $3.3 billion Hermosa Critical Minerals Project in Arizona, completing NEPA review two months ahead of statutory deadline under the FAST-41 framework. The decision covers one of the world's largest undeveloped zinc resources alongside the only advanced U.S. project capable of producing battery-grade manganese, and positions Hermosa as the regulatory template for 57 additional mining projects now enrolled in the FAST-41 pipeline under the current administration.
Introduction
On July 7, 2026, the U.S. Department of Agriculture's Forest Service issued the final Record of Decision for the Hermosa Critical Minerals Project, a $3.3 billion underground mining and processing operation proposed by South32 Hermosa Inc. in the Patagonia Mountains of Santa Cruz County, Arizona. The decision completed the National Environmental Policy Act review process two months ahead of its statutory deadline, making Hermosa the most expeditiously processed major mining project in recent federal permitting history.
The Record of Decision authorizes construction of ancillary federal-land infrastructure on the Coronado National Forest, including a primary access road, a dry-stack tailings facility, and a segment of a 138-kilovolt transmission line. South32 must now submit financial assurance documentation and a final Mine Plan of Operations; full federal authorization is scheduled for September 4, 2026.
The decision was completed under the FAST-41 framework established by the Fixing America's Surface Transportation Act, and it advances three Trump administration executive orders: EO 14154 (Unleashing American Energy), EO 14156 (Declaring a National Energy Emergency), and EO 14241 (Immediate Measures to Increase American Mineral Production). For a country that averages 29 years from mineral discovery to mine production, and that remains 100 percent import-reliant for 12 critical minerals, the approval represents a structural departure from the status quo rather than an incremental improvement.
The Deposit: Scale, Grade, and Strategic Significance
The Hermosa project sits atop a mineralised system of unusual breadth. Its core asset, the Taylor sulphide deposit, holds a JORC-compliant ore reserve of 99 million tonnes and a 169-million-tonne mineral resource base. At steady-state production, the underground concentrator, processing 4.3 million tonnes of ore annually, is forecast to yield 123,000 tonnes of zinc, 155,000 tonnes of lead, and 8.2 million ounces of silver per year. South32 reported a 52 percent increase in Taylor's ore reserves as recently as April 2026, extending the expected mine life to roughly 33 years, with mineralization remaining open in multiple directions.
Beyond Taylor, the broader Hermosa project encompasses two additional deposits with distinct strategic profiles. The Clark deposit carries battery-grade manganese, making Hermosa the only advanced U.S. project capable of producing both manganese and zinc, and the only proposed fully integrated source of battery-grade manganese in North America. The Peake deposit, where a 32 percent increase in mineral resource estimates was confirmed through continued exploration, is expected to serve as a copper-producing mine-life extension within the Taylor development framework. In total, the project spans five federally designated critical minerals: zinc, lead, silver, copper, and manganese.
The strategic weight of that combination is difficult to overstated in supply-chain terms. The United States is 100 percent net-import reliant for manganese, and China dominates global zinc smelting capacity, leaving domestic downstream industries exposed to a midstream chokepoint on a metal foundational to galvanised steel, renewable energy infrastructure, and battery chemistry. South32 has committed to prioritizing North American smelters for any copper produced at the site, and has already engaged 16 entities across the battery supply chain, with two non-binding memoranda of understanding in place for manganese offtake.
As South32 Hermosa President Pat Risner noted, "Hermosa would be the only fully integrated source of battery-grade manganese in North America, where it is mined and processed into a finished product that can go into precursor material domestically." That claim is not marketing language; it is an accurate description of the current North American supply architecture for battery-grade manganese, which has no comparable domestic alternative at comparable development maturity.
FAST-41: The Permitting Framework and What It Actually Changed
Hermosa became the first mining project ever admitted to the FAST-41 programme on May 8, 2023, when the Federal Permitting Improvement Steering Council (FPISC) announced its inclusion under the Biden administration's expansion of FAST-41 eligibility to critical minerals projects. The admission set a precedent that has since been codified into practice: the Trump administration has enrolled 57 additional mining projects into the programme, explicitly citing Hermosa as the proof-of-concept.
FAST-41, enacted under President Obama in December 2015 as Title 41 of the Fixing America's Surface Transportation Act, addresses the specific structural failure that makes U.S. permitting so slow: not the quality of individual agency reviews, but the lack of coordination, accountability, and real-time transparency across the 13 federal agencies that participate in environmental review for major infrastructure projects. FAST-41 imposes binding milestones tracked on a public Permitting Dashboard, creates interagency accountability mechanisms, and designates a FPISC facilitator to resolve bottlenecks before they compound into multi-year delays.
For Hermosa, the framework did not truncate review quality or limit public participation. The project's NEPA process incorporated consultation with Tribes, coordination with the U.S. Fish and Wildlife Service (resulting in a Biological Opinion signed February 26, 2026, covering ESA-listed species including jaguars and Mexican spotted owls), and a 45-day formal objection period that generated a 251-page submission from a coalition of environmental groups. South32 refined the project's design multiple times in response to agency and community feedback, including a redesign of the dry-stack tailings facility to avoid sensitive plant species and a rerouting of the primary access road to reduce traffic impacts on Patagonia and surrounding recreation areas.
Emily Domenech, Executive Director of the Permitting Council, stated: "This project was the first mining project covered by FAST-41 and helped lay the groundwork for the 57 additional mining projects that have followed during the Trump Administration." The significance is institutional: Hermosa has converted FAST-41 from a theoretical framework for mining projects into a demonstrated operational pathway with a completed federal approval as its evidence base.
Cost Escalation, Construction Status, and the Project's Economic Footprint
South32 disclosed in late April 2026 that total capital expenditure for Hermosa had increased from an initial estimate of $2.16 billion to approximately $3.3 billion, a rise of more than 50 percent driven by surging construction costs, U.S. tariff policies on imported materials and equipment, greater-than-expected shaft-sinking challenges, and contractor productivity headwinds. First concentrate production, originally targeted for the first half of 2027, has been pushed back to the first half of 2028, with full design capacity now expected in June 2031.
Despite the cost escalation, construction on the privately owned portion of the project was approximately halfway complete as of mid-2026. Mine shafts had already exceeded 1,200 feet in depth, advancing at roughly seven feet per day as of February 2026. South32 had secured all required state-level permits from the Arizona Department of Environmental Quality for surface infrastructure on private land prior to the federal decision, and completed a $30 million remediation of historic mine waste on patented fee land as early as 2020 using a dry-stack facility it built as part of that remediation effort.
The economic footprint at the county level is substantial. If fully developed, Hermosa would represent the largest single investment in Santa Cruz County history. The project would nearly double the county's property tax base, currently approximately $14 million. Its contribution to county GDP and economic output would equal roughly 20 percent of current county-level GDP. The project is expected to create up to 900 direct jobs and thousands more through indirect economic activity, with an 80 percent local hiring target. The projected operational lifespan, incorporating all three deposits, extends to approximately 70 years.
Senator Mark Kelly summarized the bipartisan economic case directly: "If we're serious about bringing supply chains back to America and reducing our dependence on foreign countries, we need to responsibly produce more critical minerals here at home." The Arizona Chamber of Commerce and Industry described Hermosa as "a model for how permitting should work," citing the project's combination of rigorous multi-year environmental review and adherence to a federal permitting schedule.
Environmental Opposition and Unresolved Legal Questions
The Record of Decision was not issued into a policy vacuum free of challenge. A coalition of more than a dozen environmental organizations, led by the Patagonia Area Resource Alliance (PARA) and joined by the Sierra Club's Grand Canyon Chapter, the Center for Biological Diversity, and the Sky Island Alliance, filed a 251-page objection on April 17, 2026, alleging the Forest Service had not resolved fundamental legal questions before authorizing construction through sensitive habitat.
The core substantive objections center on three interrelated concerns. First, the project's primary access road and underground infrastructure pass through designated habitat for jaguars and Mexican spotted owls, both listed under the Endangered Species Act, and opponents argue the Forest Service's Biological Opinion does not adequately account for long-term cumulative impacts. Second, the decision grants 31 exemptions from the Coronado National Forest Plan, which critics argue conflicts with land-use guidance for the area. Third, the project's water impacts over its 70-year operational life include an estimated withdrawal of 195,000 acre-feet from the local aquifer, which hydrological modeling in the environmental impact statement projects will draw the water table down by 250 feet across nearly 50 square miles, affecting wells within three miles of the mine.
The Arizona Department of Environmental Quality has separately flagged discharged water from existing mine operations for exceeding allowable levels of heavy metals. An ADEQ aquifer protection permit has been issued, but opponents have appealed that permit decision; that case is now pending before the Arizona Court of Appeals. Anna Darian, executive director of PARA, said: "The Forest Service approved this project while serious legal questions remain unresolved, leaving many residents wondering whether these agencies are still serving the public interest."
Russ McSpadden of the Center for Biological Diversity stated directly that "this fight is far from over," signaling the likelihood of federal litigation following the final Mine Plan of Operations authorization in September. The 135-plus conservation, mitigation, and monitoring measures South32 committed to throughout the review process will become federally enforceable components of that final authorization, providing a legal framework for compliance enforcement. Whether that framework proves sufficient to withstand court challenge is the material uncertainty that will define the project's near-term trajectory.
U.S. Permitting Reform in Context: What 29 Years Costs
The data undergirding U.S. permitting reform advocacy is not disputed. According to S&P Global's analysis "Mine Development Times: The U.S. in Perspective," the average timeline from mineral discovery to mine production in the United States is approximately 29 years, the second-longest in the world behind Zambia's 34-year average. Federal permitting alone typically consumes seven to ten years, compared to two to three years in Canada and one to two years in Australia, countries with similarly stringent environmental standards but more disciplined procedural frameworks.
The downstream consequences of that delay are quantifiable. U.S.-based mining projects lose more than one-third of their value during the permitting process alone, a structural discount that suppresses exploration investment. Companies developing projects in Canada and Australia spent 81 percent and 57 percent more, respectively, on exploration than those operating in the United States over the past 15 years, reflecting where capital migrates when permitting timelines are predictable. The result is that the United States, despite holding significant domestic mineral endowments, has systematically underinvested in their development.
The import-reliance figures confirm the cumulative cost of that structural underinvestment. As of 2024, the United States was 100 percent net-import reliant for 12 of the 60 minerals on the USGS Critical Minerals List (updated November 2025) and more than 50 percent reliant for an additional 29. China supplied more than 50 percent of U.S. demand for 21 mineral commodities in 2025 and dominates production or processing for 29 critical minerals overall. Even where mining occurs outside China, Chinese midstream infrastructure frequently processes the raw material before it reaches U.S. industry, creating chokepoint exposure that domestic permitting delays perpetuate.
Building on my analysis of China's refining grip in "Bald Hill Returns, Finniss Resumes" in July 2026, the Hermosa approval illustrates the supply-chain architecture problem from the other side: the U.S. not only lacks domestic refining capacity for most critical minerals, it has historically been unable to advance primary mining projects fast enough to justify building that capacity. Hermosa does not resolve the refining gap by itself, but it creates a domestic feedstock base for zinc and manganese that has not previously existed at commercial scale.
Conclusion: A Template Under Pressure
The July 7, 2026 Record of Decision for the Hermosa Critical Minerals Project is the most significant federal mine permitting milestone in recent U.S. history, and the data supports that characterization on multiple dimensions. It is the first FAST-41 mining project to reach a completed NEPA determination; it covers a deposit capable of producing five federally designated critical minerals from a single operational footprint; it was completed two months ahead of statutory deadline; and it has directly seeded the enrollment of 57 additional mining projects into the same framework.
The project's design credentials reinforce the policy argument. A fully underground extraction model limits surface disturbance to roughly 750 acres, a fraction of conventional open-pit operations. Dry-stack tailings technology, a 90 percent water recycling rate, electrified mining equipment, and more than 135 federally enforceable mitigation commitments position Hermosa as a next-generation low-impact operation rather than a legacy extraction project. Secretary of Agriculture Brooke Rollins framed it as proof that "increasing domestic production can reduce our dependence on vulnerable foreign sources, and power modern industries, advanced technologies, and essential infrastructure."
The environmental litigation risk is real and should not be minimized. The pending Arizona Court of Appeals case on the ADEQ aquifer protection permit, the unresolved ESA questions around jaguar and Mexican spotted owl habitat, and the 31 Forest Plan exemptions all create legal exposure that could delay or complicate the final Mine Plan of Operations authorization scheduled for September 4, 2026. The opponents have explicitly signaled intent to continue legal challenge, and federal court review of NEPA determinations, while deferential, is not automatic.
What the Hermosa decision has established with greater certainty is the institutional proof that FAST-41 can deliver a rigorous, publicly accountable, and efficient mine permitting process for critical minerals projects. The framework's expansion to 57 additional projects under the current administration means the question is no longer whether the mechanism works; it is whether the legal environment surrounding individual project approvals will allow the mechanism to produce operational mines at the pace U.S. supply-chain policy requires. Hermosa's path to September 4, and beyond, will answer that question for the entire pipeline that follows it.