EAST BOULDER MINE
Active
Underground
Metal
Operator: Stillwater Mining Company
Controller: Sibanye Stillwater Limited
Location: Big Timber, Sweet Grass County, MT
Employees: 446
2,760
Violations
491
S&S Violations
533
Accidents
$1.2M
Penalties
Recent Violations
View all 2,760 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 02/05/2026 | 57.19121 | Non-S&S | ModNegligence | $0 |
| 02/04/2026 | 57.4462(a)(2) | Non-S&S | HighNegligence | $0 |
| 01/27/2026 | 57.4160(a)(1) | Non-S&S | ModNegligence | $0 |
| 01/27/2026 | 57.4360 | Non-S&S | ModNegligence | $0 |
| 01/22/2026 | 57.12028 | Non-S&S | ModNegligence | $0 |
| 01/22/2026 | 47.44(b) | Non-S&S | ModNegligence | $0 |
| 01/21/2026 | 57.4201(a)(5) | Non-S&S | ModNegligence | $0 |
| 01/20/2026 | 57.12006 | Non-S&S | LowNegligence | $0 |
| 01/20/2026 | 57.20003(a) | Non-S&S | ModNegligence | $0 |
| 01/15/2026 | 57.12020 | Non-S&S | LowNegligence | $151 |
| 01/15/2026 | 57.12018 | Non-S&S | ModNegligence | $549 |
| 01/15/2026 | 57.3360 | Non-S&S | ModNegligence | $245 |
| 01/14/2026 | 47.42 | Non-S&S | ModNegligence | $165 |
| 01/14/2026 | 57.11005 | Non-S&S | LowNegligence | $151 |
| 01/14/2026 | 57.15030 | S&S | HighNegligence | $20,047 |
| 01/14/2026 | 57.4504(b) | Non-S&S | ModNegligence | $165 |
| 01/14/2026 | 57.20032 | Non-S&S | ModNegligence | $165 |
| 01/13/2026 | 57.11001 | Non-S&S | ModNegligence | $818 |
| 01/13/2026 | 57.11051(a) | Non-S&S | ModNegligence | $549 |
| 01/13/2026 | 57.8528 | Non-S&S | ModNegligence | $549 |
Accidents & Injuries
View all 533 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 01/06/2026 | DISORDERS (REPEATED TRAUMA) | OCCUPATNAL ILLNESS NOT DEG 1-6 | None |
| 12/16/2025 | DISORDERS (REPEATED TRAUMA) | OCCUPATNAL ILLNESS NOT DEG 1-6 | None |
| 12/04/2025 | MACHINERY | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 10/20/2025 | POWERED HAULAGE | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 08/27/2025 | POWERED HAULAGE | DAYS AWAY FROM WORK ONLY | 4d lost |
| 08/03/2025 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | None |
| 07/19/2025 | FALL OF ROOF OR BACK | ACCIDENT ONLY | None |
| 07/14/2025 | MACHINERY | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 06/22/2025 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 9d lost |
| 05/08/2025 | EXPLOSIVES AND BREAKING AGENTS | ACCIDENT ONLY | None |
Inspections
View all 298 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 02/25/2026 | 02/25/2026 | 0.00 | 0 |
| 01/22/2026 | 01/22/2026 | 0.00 | 0 |
| 01/05/2026 | 02/09/2026 | 499.75 | 4 |
| 11/03/2025 | 11/13/2025 | 38.50 | 1 |
| 10/27/2025 | 11/20/2025 | 418.75 | 5 |
| 09/15/2025 | 09/16/2025 | 21.00 | 1 |
| 07/28/2025 | 08/05/2025 | 27.50 | 1 |
| 07/23/2025 | 07/25/2025 | 19.00 | 1 |
| 07/21/2025 | 07/25/2025 | 39.25 | 1 |
| 07/10/2025 | 07/10/2025 | 5.25 | 1 |
Mine Details
MSHA Mine ID2401879
Mine TypeUnderground
StatusActive
CommodityMetal
SIC DescriptionPlatinum Group Ore
Employees446
Days/Week7.0
Hours/Shift12.0
Coordinates45.5036110, -110.0858330
Nearest TownBig Timber
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Frequently Asked Questions
How many MSHA violations does EAST BOULDER MINE have?
EAST BOULDER MINE has 2760 MSHA violations on record, of which 491 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $1.2M.
What type of mine is EAST BOULDER MINE?
EAST BOULDER MINE is a Underground mine producing Metal, located in Big Timber, Sweet Grass County, MT. It currently has 446 employees.
Has anyone been injured or killed at EAST BOULDER MINE?
According to MSHA records, EAST BOULDER MINE has 533 reported accident/injury records and 0 fatalities on file.
Who operates EAST BOULDER MINE?
EAST BOULDER MINE is operated by Stillwater Mining Company and controlled by Sibanye Stillwater Limited. MSHA Mine ID: 2401879.