Trump, Congress move to overturn Minnesota mining ban: project and permitting lens for engineers
Reviewed by Tom Sullivan

First reported on MINING.com
30 Second Briefing
US President Donald Trump and Congress are moving to overturn Joe Biden’s 20‑year mining ban on more than 225,000 acres of Superior National Forest in northern Minnesota, using the Congressional Review Act after Interior officials argued the ban was not properly filed in the Congressional Record. If lawmakers reject the ban within 60 days, the Trump administration could reissue long‑contested federal leases for Antofagasta’s Twin Metals underground copper‑nickel‑cobalt‑PGM project, located in the Duluth polymetallic belt. The mine would be Minnesota’s first underground operation since 1967 and the next major US nickel producer as the country’s only existing nickel mine nears closure.
Technical Brief
- Congressional Review Act mechanism would bar future administrations from issuing similar bans once overturned.
- Biden’s 2023 withdrawal covered more than 225,000 acres of Superior National Forest near the Canadian border.
- Interior officials argue the 1976 federal lands law was breached because the withdrawal was not properly filed in the Congressional Record.
- Lawmakers have a 60‑day window from submission of the corrected paperwork to vote on disapproval.
Our Take
In our Policy coverage, most US copper and cobalt pieces focus on Western states, so a high-profile permitting fight in Minnesota signals that federal critical minerals debates are now reaching historically iron-focused districts in the Upper Midwest.
Because the Twin Metals leases date back to 1966, any Congressional move to override the 20‑year ban will be closely watched by other legacy US mineral lease holders, who may see it as a precedent for challenging modern land-withdrawal decisions on older titles.
Linking this Minnesota case to ‘critical minerals’ such as cobalt and nickel aligns it with 144 keyword-matched pieces in our database, suggesting that national security and supply-chain framing is increasingly being used to contest environmental protections on federal lands.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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