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.
Location
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 timeline
1
NOI in Federal Register
05/27/2022
2
DEIS NOA in Federal Register
06/23/2023
3
FEIS NOA in Federal Register
08/09/2024
4
Objection Period Start
11/27/2023
5
Decision
08/2024 (Estimated)
6
Implementation
01/2025 (Estimated)
NEPA / regulatory detail
| Special Authority | Not Applicable / Other |
| Notice and Comment Regulation | 218 (2013) Non-HFRA |
| Project Activity | Minerals Or Geology Plans Of Operations; Roadless Area Management |
| 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 |
| Legal Land Description | Township 4 South, Range 13 East, Sections 1, 2 and 11, Principal Meridian, Montana. |