Stillwater Mining Company, East Boulder Mine Amendment 004 Expansion EIS
Stillwater Mining Company - East Boulder Mine, proposes an expansion of their surface facilities to include a new Tailings Storage Facility and new Waste Rock Storage Facility with associated infrastructure.
Project Summary
Location Summary:
The East Boulder Mine is located in Sweet Grass County, approximately 16 miles south of McLeod, MT on NFS Road #205 in the East Boulder drainage.
Project Milestones:
| Milestone | Date |
|---|---|
| NOI in Federal Register | 05/27/2022 |
| DEIS NOA in Federal Register | 06/23/2023 |
| FEIS NOA in Federal Register | 08/09/2024 |
| Objection Period Start | 11/27/2023 |
| Decision | 08/2024 (Estimated) |
| Implementation | 01/2025 (Estimated) |
Expected Analysis Type:
Environmental Impact Statement
Special Authority:
Not Applicable / Other
Lead Management Unit:
Yellowstone Ranger District
Notice and Comment Regulation:
218 (2013) Non-HFRA
Project Purpose:
Minerals And Geology
Project Activity:
Minerals Or Geology Plans Of Operations; Roadless Area Management
Current Status:
Completed
Project Decision Information
Stillwater Mining Company, East Boulder Mine Amendment 004 Expansion ROD
Decision Signed Date: 08/30/2024
Forests:
Custer Gallatin National Forest
Districts:
Yellowstone Ranger District
States:
Montana
Counties:
Sweet Grass
Legal Land Description:
Township 4 South, Range 13 East, Sections 1, 2 and 11, Principal Meridian, Montana.
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Robert Grosvenor
5242 Highway 89 South
Livingston, MT 59047
406-848-7375 ext.28
robert.grosvenor@usda.gov
Last Updated: 9/3/2024