Data / Mines / Montana / East Boulder Mine
East Boulder Mine: 643 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
East Boulder Mine is an active platinum group ore underground mine in Sweet Grass County, Montana, operated by Stillwater Mining Company with 446 employees on MSHA's record (mine ID 2401879). Since January 1, 2022 MSHA inspectors issued 643 citations and orders there with $469,323 in proposed penalties, and 72 accident reports were filed there, with 67 injury or illness cases.
The request: Watch East Boulder Mine (MSHA mine ID 2401879) in Sweet Grass County, Montana: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 2401879
- Status
- Active since March 2, 1998
- Main commodity
- Platinum group ore
- Mine type
- Underground
- County
- Sweet Grass County, Montana
- Nearest town
- Big Timber
- Operator
- Stillwater Mining Company
- Employees
- 446
- MSHA field office
- Rapid City SD Field Office
- Citations and orders since January 1, 2022
- 643
- Significant and substantial
- 114 (17.7%)
- Closure orders
- 4
- High negligence or reckless
- 24
- Proposed penalties
- $469,323
- Amount paid so far
- $378,949
- Inspections
- 88
- Inspector hours on site
- 3,942
- Citations per inspection
- 7.31 (all mines 2.30)
- Accident reports
- 72
- Injury and illness cases
- 67
- Fatalities
- 0
- Latest MSHA record
- November 4, 2026
- Citations issued to contractors here
- 49 ($35,054 proposed)
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 78 | 11 | $61,865 | 12 |
| 2023 | 122 | 18 | $52,162 | 21 |
| 2024 | 180 | 44 | $151,185 | 14 |
| 2025 | 157 | 19 | $101,171 | 12 |
| 2026 | 106 | 22 | $102,940 | 8 |
Standards cited most at East Boulder Mine
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 57.20003 | Underground metal and nonmetal mines | 51 |
| 30 CFR 57.12032 | Underground metal and nonmetal mines | 39 |
| 30 CFR 57.3200 | Underground metal and nonmetal mines | 33 |
| 30 CFR 57.14100 | Underground metal and nonmetal mines | 29 |
| 30 CFR 57.4201 | Underground metal and nonmetal mines | 23 |
| 30 CFR 57.11001 | Underground metal and nonmetal mines | 21 |
| 30 CFR 57.12004 | Underground metal and nonmetal mines | 17 |
| 30 CFR 57.8528 | Underground metal and nonmetal mines | 17 |
| 30 CFR 57.4104 | Underground metal and nonmetal mines | 16 |
| 30 CFR 57.3360 | Underground metal and nonmetal mines | 15 |
| 30 CFR 57.20011 | Underground metal and nonmetal mines | 15 |
| 30 CFR 57.8531 | Underground metal and nonmetal mines | 15 |
| 30 CFR 57.12018 | Underground metal and nonmetal mines | 15 |
| 30 CFR 57.14205 | Underground metal and nonmetal mines | 12 |
| 30 CFR 47.41 | Hazard communication | 11 |
Injury and illness cases at East Boulder Mine
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 3 |
| Days away from work or restricted activity | 31 |
| No lost time, or an occupational illness | 33 |
What the accident reports at East Boulder Mine describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 14 |
| Disorders (repeated trauma) | 13 |
| Machinery | 9 |
| Slip or fall of person | 8 |
| Fall of roof or back | 7 |
| Handtools (nonpowered) | 6 |
| Powered haulage | 5 |
| Other | 2 |
| Stepping or kneeling on object | 2 |
| Poisoning (toxic materials) | 2 |
Equipment named in accident reports at East Boulder Mine
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 6 |
| Rock drill | 4 |
| Mucking machine | 4 |
| Ore haulage trucks - off highway trucks | 3 |
| Hand tools (powered) | 3 |
| Mancar | 3 |
| Carriage-mounted drills | 2 |
| Trucks | 1 |
| Forklift | 1 |
| Front-end loader | 1 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.