Stillwater Mine Complex Amendment 14 EIS
The Stillwater Mine Plan of Operations amendment proposes to continue production of platinum group metals via underground mining operations for an additional 36-42 years through the expansion of existing surface infrastructure and construction.
Project Summary
Location Summary:
The project is located within the Stillwater River drainage near Nye, Montana, involving both private and National Forest System lands.
Project Milestones:
| Milestone | Date |
|---|---|
| NOI in Federal Register | 06/2026 (Estimated) |
| DEIS NOA in Federal Register | 06/2027 (Estimated) |
| FEIS NOA in Federal Register | 04/2028 (Estimated) |
| Objection Period Start | 01/2028 (Estimated) |
| Decision | 04/2028 (Estimated) |
| Implementation | 06/2028 (Estimated) |
Expected Analysis Type:
Environmental Impact Statement
Special Authority:
Not Applicable / Other
Lead Management Unit:
Custer Gallatin National Forest All Units
Notice and Comment Regulation:
218 (2013) Non-HFRA
Project Purpose:
Minerals And Geology
Project Activity:
Minerals Or Geology Plans Of Operations
Current Status:
Developing Proposal
Forests:
Custer Gallatin National Forest
Districts:
Beartooth Ranger District
States:
Montana
Counties:
Stillwater
Legal Land Description:
Not Applicable
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Sarah Hill
P.O. Box 130
Bozeman, MT 59771
000-000-0000
Sarah.Hill2@usda.gov
Last Updated: 5/1/2026