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Record closed July 17, 2026
Critical threat to public lands

Stop Stillwater Mine's 40-year expansion on Custer Gallatin Forest

Stillwater Mine Complex Amendment 14 Environmental Impact Statement

U.S. Forest Service· Custer Gallatin National ForestU.S. Forest Service project page ↗

Forest ServiceWe track this on the agency’s own system of record, where most on-the-ground decisions live.

Custer Gallatin National Forest, Montana
Custer Gallatin National Forest, Montana · public land, held in trust for you

The groups on this fight

4 groups work Montana

By footprint, from the same match the STAND matchmaker runs; none is linked to this decision in our record yet. Give straight to them; nothing routes through us.

  • American Prairie

    Works Montana: defending its own bison herd, formally protesting BLM's revocation of grazing permits on 63,000 public-land acres.

  • Defenders of Wildlife

    Works Montana: named plaintiff in the Rock Creek Mine case, which turned on threatened grizzly bears and bull trout.

  • Earthjustice

    Works Montana: counsel in the long-running litigation against the Rock Creek and Montanore mines proposed beneath the wilderness.

  • Western Watersheds Project

    Works Montana: filed a protest against BLM's revocation of the bison grazing permits.

Every group above is on STAND for Public Lands, with its court record, its filings and who backs it.

A platinum mine wants to dig deeper and build bigger on national forest land for four more decades.

What’s at risk

Wildlife habitat and public land on the Custer Gallatin National Forest face decades of expanded surface industrial infrastructure. The mine is seeking approval to extend operations 36 to 42 years beyond their current footprint.

If this goes through

If approved, the expansion locks in industrial mining operations on this national forest for up to 42 more years, a commitment that is effectively permanent for this generation.

Our plain-English read of the official notice ↗. Check it against the agency’s own words below.

4 holes in the agency’s own analysis

What the public could have raised, from the agency’s own document

  • I oppose this action as proposed, and I ask the agency to weigh the specific harms below.
  • Oppose expanding surface infrastructure at the Stillwater Mine on the Custer Gallatin National Forest, which would lock in platinum group metals mining for up to 42 more years.
  • The Forest Service must rigorously analyze in this EIS how an additional 36 to 42 years of mining operations will affect the Custer Gallatin National Forest before approving any expansion.
  • I urge the Forest Service to reject Amendment 14 because committing public lands on the Custer Gallatin National Forest to decades more of industrial mining infrastructure is not in the public interest.
  • Do not approve the Stillwater Mine expansion without fully weighing the long-term cost of growing surface infrastructure on the Custer Gallatin National Forest over a 36 to 42 year horizon.
Show all 6 points from the document
  • Say something only you can say. The law requires the agency to consider and respond to substantive comments, and specifics are what make a comment substantive.

In the agency’s own words

The Stillwater Mine proposes to continue production of platinum group metals for an additional 36-42 years by expanding existing surface infrastructure. Please copy and paste this link in your browser to view project related documents: https://usfs-public.box.com/s/903zqyxu4qekivxq60544ts25n032qvt

U.S. Forest Service project page ↗

The reporting behind this

From More Than Just Parks

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