First FAST-41 mine clears federal exam

The first mine in the FAST-41 lane just cleared its federal exam — and the real prize isn't zinc

South32's Hermosa project in Arizona's Patagonia Mountains received a Final Record of Decision from the U.S. Forest Service on July 8, 2026 — the first mining project to run the federal FAST-41 permitting gauntlet end-to-end. The decision is less a mining story than a test of whether expedited review can survive the litigation that sank Arizona's last two mega-mines.

The U.S. Forest Service issued the Final Record of Decision (ROD) for South32's Hermosa Critical Minerals Project on July 8, 2026, completing the federal environmental review for infrastructure on Coronado National Forest land and making Hermosa the first mining project to traverse the FAST-41 expedited permitting process from entry to final decision. The project, which South32 says could produce up to five federally designated critical minerals including zinc, silver, and battery-grade manganese, is already roughly 50% built on private land, according to Chamber Business News. The milestone matters: it is the first live test of a framework Congress designed to shield strategic infrastructure from the decade-long NEPA litigation that paralyzed Resolution Copper and vacated Rosemont's approval. Whether Hermosa holds will determine whether FAST-41 becomes the default lane for every critical minerals project in the country or a cautionary tale about what expedited review can and cannot buy.

The strategic asset nobody else has

The headline minerals are zinc and silver, but the asset that makes Hermosa nationally significant is manganese. The United States has not mined manganese domestically since the 1970s and is 100% import-reliant for a metal essential to both steel production and, increasingly, lithium-ion battery cathodes, according to the Congressional Research Service. Manganese ore is imported principally from Gabon (62%), South Africa (24%), and Mexico (13%), and China dominates the refining of battery-grade manganese compounds.

By South32's own description, Hermosa's Clark deposit is "the only advanced project in the US with a clear pathway to produce battery-grade manganese for the domestic electric vehicle market from locally sourced ore," per the company's March 2026 quarterly report. The U.S. government has put money behind that claim: a $20 million Defense Production Act grant to fund the exploration decline and a $166 million Department of Energy grant to support a future commercial-scale manganese facility. An integrated test plant is expected to complete in FY27, informing flowsheet design and customer qualification.

The Carnegie Endowment's October 2025 analysis reaches a blunt conclusion: even under the most optimistic domestic-mining scenarios, the United States would still need to import substantial manganese to meet projected demand through 2035, because known reserves are "eclipsed by a single year of demand from the U.S. steel industry," as the Carnegie Endowment put it. Hermosa does not close that gap. But it is the only project in the pipeline with a credible path to producing battery-grade material on U.S. soil, which is why it was the first mine admitted to FAST-41, a program reserved for infrastructure of national significance.

Sources: U.S. Geological Survey; South32 company announcements (March 2026); Carnegie Endowment for International Peace (Oct 2025); Congressional Research Service

What FAST-41 actually changed

FAST-41, enacted as Title 41 of the 2015 Fixing America's Surface Transportation Act, did not weaken the National Environmental Policy Act's substantive standards. What it changed was procedure — and, critically, litigation exposure.

Under 42 U.S.C. § 4370m-6, a claim seeking judicial review of any authorization for a covered project must be filed within two years of the Federal Register publication of final agency action, a reduction from the six-year statute of limitations that applies to ordinary NEPA challenges. More consequentially, in the case of environmental reviews under NEPA, the claim must be filed by a party that submitted a comment during the review — and the comment must have been "sufficiently detailed" to put the lead agency on notice of the issue being challenged, according to the U.S. Code, 42 U.S.C. § 4370m-6.

The practical effect is to compress both the window and the standing for legal challenges. Opponents who did not participate in the formal comment periods are barred from suing. Opponents who did participate are confined to the issues they raised. The Federal Permitting Improvement Steering Council's own guidance describes this as "enhanced legal protections" that reduce the statute of limitations "from six years to two years," per the FPISC FAST-41 factsheet.

Source: 42 U.S.C. § 4370m-6; FPISC FAST-41 Implementation Guidance (OMB M-17-14, Jan. 2017)

For South32, this means the litigation window for the July 8 ROD will close in approximately July 2028, and only groups that filed detailed comments during the NEPA process can challenge it. The Patagonia Area Resource Alliance and its allies cleared that hurdle: sixteen organizations submitted 221 pages of comments on the Draft Environmental Impact Statement, per Patagonia Area Resource Alliance. The question is not whether they can sue, but whether FAST-41's procedural constraints will meaningfully limit the duration and scope of any challenge in ways that standard NEPA would not.

The shadow of Resolution Copper and Rosemont

Arizona's recent mining history is a warning, not a model. The Resolution Copper project, southeast of Hermosa in the same part of the state, was authorized by a 2017 Forest Service ROD but has been blocked by litigation and an administrative injunction that has dragged through the Ninth Circuit for years, with Resolution's lawyers in 2025 arguing the continuing injunction was causing "ever-increasing irreparable harm" to the company and the United States, according to a motion filed in the Ninth Circuit. The Rosemont copper mine, also in the Coronado National Forest, saw its Forest Service ROD vacated by a federal court after years of litigation over the agency's approval process.

The common thread: Forest Service decisions in the Coronado National Forest have proven vulnerable to precisely the kind of NEPA challenges, including cumulative impacts analysis, baseline data deficiencies, and ESA consultation gaps, that environmental litigants have weaponized effectively for over a decade in Arizona. The Hermosa litigation already mirrors this pattern. The Patagonia Area Resource Alliance suit (Case 4:23-cv-00280), filed June 20, 2023, alleges the Forest Service's approval of exploratory drilling violated NEPA by failing to analyze cumulative effects alongside the broader Hermosa project, and violated the Endangered Species Act in its consultation with the U.S. Fish and Wildlife Service, according to the Second Amended Complaint. The Town of Patagonia itself filed an amicus brief in December 2025 arguing USFS relied on a two-decade-old groundwater study that its own hydrologist contradicted, per the Town's amicus memorandum.

The difference now is the FAST-41 framework. Whether the existing case — which challenges the Sunnyside exploration project, not the full Hermosa mine plan — metastasizes into a challenge to the Final ROD will depend on whether the same legal theories survive the narrower standing and statute-of-limitations provisions. The existing suit was filed under standard NEPA rules before the full project's ROD was issued; any new challenge to the July 8 ROD will be governed by FAST-41's two-year window and commenter-only standing.

The environmental counterargument

The Forest Service did not simply approve a mine; it amended the Coronado National Forest Plan with 31 stipulation exemptions to accommodate the project, according to azcentral. That detail, first reported by the Arizona Republic, underscores the scope of the accommodation: the project sits in designated critical habitat for jaguars and Mexican spotted owls, in one of the most biodiverse mountain ranges in the United States.

South32 committed to more than 135 conservation, mitigation, and monitoring measures developed in coordination with federal agencies, 12 Tribes with historic affiliation, and local stakeholders, many of which become federally enforceable components of the final Mine Plan of Operations. The company redesigned its dry-stack tailings facility to avoid sensitive plant species, rerouted its primary access road to reduce traffic impacts on the town of Patagonia, and committed to surface and groundwater monitoring beyond state requirements, per Chamber Business News.

Critics argue the process prioritized speed over substance. The Patagonia Area Resource Alliance and 15 allied groups submitted detailed objections to the Draft EIS, and the EPA on May 30, 2026, ruled that a state air permit did not meet federal Clean Air Act standards, giving the Arizona Department of Environmental Quality 90 days to revise it, according to KGUN9. The air-permit dispute is separate from the Forest Service ROD but signals that federal environmental review is not monolithic — one agency's approval does not foreclose another's objection.

The deeper concern, raised by academic research submitted to Congress in April 2026, is that eliminating community engagement requirements is unlikely to speed timelines and may increase post-permitting litigation. As the testimony noted: "eliminating the requirement to engage local communities is unlikely to speed up timelines. Rather, it has been demonstrated to increase the likelihood of litigation in the post-permitting stage, thereby leading to lengthened development times," according to House Natural Resources Committee testimony. FAST-41 does not eliminate engagement — Hermosa ran 120-plus days of formal public comment and consultation with 12 Tribes — but the structural narrowing of litigation avenues creates pressure to front-load substantive objections into the comment record, which is precisely what PARA and its allies did.

The legislative tailwind

Hermosa's milestone arrives as Congress is voting on legislation to make FAST-41 mining coverage permanent and to go further. The Critical Mineral Dominance Act (H.R. 4090), sponsored by Rep. Pete Stauber (R-MN), passed the House 224–195 on February 4, 2026, and received a Senate Energy and Natural Resources Subcommittee hearing on July 15, 2026 — one day after the Chamber Business News report, according to Congress.gov. The bill would direct Interior to identify priority mining projects on federal land that can be "immediately approved" and to "take all necessary and appropriate steps to expedite those projects."

A separate bill, H.R. 1501, the Protecting Domestic Mining Act, would codify mining and mineral processing as covered sectors under FAST-41 and block a never-finalized Biden-era rule that would have narrowed FAST-41 eligibility to only critical-mineral projects, per the House Committee Report 119-691. The committee report explicitly names Hermosa as the first FAST-41 mining project and notes that the community nearest the project "has expressed significant concerns about the project's potential impact on the area's scarce water resources and renowned biodiversity" and "advocates for significantly greater transparency and cooperation through the FAST-41 process."

The legislative direction is clear: more projects, faster. Hermosa is the proof of concept, and the debate over whether it worked will shape every subsequent fast-tracked mine.

31 — Coronado National Forest Plan stipulation exemptions granted to accommodate the Hermosa project. The U.S. Forest Service amended the Forest Plan to approve Hermosa's infrastructure on National Forest land, including an 8-mile access road, a 138-kV power line, and a dry-stack tailings facility. The project site is in designated critical habitat for jaguars and Mexican spotted owls. (Source: Arizona Republic (azcentral), July 8, 2026)

What production actually looks like

The permitting milestone is a federal clearance, not a start date. South32's most recent project update, from the March 2026 quarterly report, indicates first ore from the Taylor deposit is expected in mid-FY28 (calendar late 2027 or early 2028), with first production in the second half of FY28. Full nameplate capacity is now expected in FY31, pushed back from FY30 due to contractor underperformance on shaft sinking.

The Clark manganese deposit is on a separate, slower track. The exploration decline was completed in the December 2025 quarter, and the integrated test plant — which will inform the commercial-scale facility design — is expected to complete in FY27. The $166 million DOE grant supports a facility that does not yet have a final investment decision or a published construction timeline. Battery-grade manganese production from Clark is years behind Taylor's zinc-lead-silver output.

This gap matters for the strategic narrative. The federal government is fast-tracking a project whose headline national-security mineral — battery-grade manganese — will not flow at commercial scale until well into the 2030s, even under optimistic assumptions. The permitting milestone secures the option; it does not secure the supply.

Key takeaways: Hermosa FAST-41 milestone

• South32's Hermosa project received a Final Record of Decision from the U.S. Forest Service on July 8, 2026 — the first mining project to complete the FAST-41 expedited permitting process.
• Hermosa's Clark deposit is the only advanced U.S. project with a pathway to battery-grade manganese, a mineral the U.S. has not mined since the 1970s and imports 100% of supply.
• FAST-41 reduces the judicial-review statute of limitations to 2 years (from up to 6) and limits NEPA challenges to parties that filed detailed comments during review.
• Construction on private land is ~50% complete; first Taylor production expected in H2 FY28 (~late 2027/early 2028); Clark manganese commercial production is years further out.
• The Forest Service amended the Coronado National Forest Plan with 31 exemptions to accommodate the project in jaguar and Mexican spotted owl habitat; 135 mitigation measures are committed.
• The Critical Mineral Dominance Act (H.R. 4090) passed the House 224–195 on Feb 4, 2026 and got a Senate hearing July 15, 2026 — legislation that would make FAST-41 mining coverage permanent.

Sources: Chamber Business News; South32; U.S. Forest Service; Congress.gov; Carnegie Endowment; 42 U.S.C. § 4370m-6

Diplomat View

The bottom line: Hermosa's Final ROD is the first proof that FAST-41 can move a contested mine through federal review — but the real test is whether the two-year litigation clock and commenter-only standing meaningfully insulate the project from the NEPA challenges that killed Resolution Copper's timeline and vacated Rosemont's approval. The forecast hinges on three conditions: whether PARA and its allies file a substantive challenge to the ROD within the FAST-41 window, whether the courts treat the existing Sunnyside-case theories as transferable to the full project, and whether South32's air-permit dispute with EPA creates a parallel track that FAST-41's protections do not reach. If no credible challenge lands by mid-2028, Hermosa becomes the template and H.R. 4090's codification of FAST-41 mining coverage becomes academic. If a challenge survives the standing filter, the expedited-lane model is narrower than its proponents claim — and Arizona's next critical-minerals project will face the same decade-long gauntlet Hermosa was designed to escape.

What to watch next:

• By October 2026: Arizona DEQ's 90-day deadline to revise the air permit flagged by EPA expires — a separate litigation track that FAST-41 does not shield.
• Mid-2028: The FAST-41 two-year statute of limitations on the July 8 ROD closes; watch for a PARA-led complaint to the District of Arizona before this date.
• FY27 (calendar 2026–27): South32's integrated test plant for Clark manganese completes; this informs the final investment decision on the commercial-scale facility the $166 million DOE grant supports.