Data / Mines / Montana / Metal mines
Metal ore mines in Montana: 15 open mines and MSHA citations
MSHA lists 15 open metal ore mines in Montana, run by 13 operators and employing 2,092 people. Since January 1, 2022 its inspectors issued 1,754 citations and orders there with $1,589,420 in proposed penalties, and operators reported 219 injury or illness cases, 2 of them fatal. The operators with the most open mines are Stillwater Mining Company; United States Antimony Corp; Montana Resources, LLC. Data from MSHA, November 6, 2026.
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- Open mines
- 15
- Operators
- 13
- Employees
- 2,092
- Intermittent
- 7
- Active
- 4
- NonProducing
- 4
- Mines run by individuals, counted and not listed
- 2
- Citations and orders since January 1, 2022
- 1,754
- Significant and substantial
- 240 (13.7%)
- Closure orders
- 27
- High negligence or reckless
- 71
- Proposed penalties
- $1,589,420
- Amount paid so far
- $932,134
- Inspections
- 315
- Inspector hours on site
- 11,243
- Citations per inspection
- 5.57 (all mines 2.30)
- Accident reports
- 227
- Injury and illness cases
- 219
- Fatalities
- 2
- Latest MSHA record
- November 4, 2026
Operators with the most open mines in Montana
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Stillwater Mining Company | 2 | 1,569 | 1,614 | $1,554,798 | 162 |
| United States Antimony Corp | 2 | 9 | 2 | $151 | 0 |
| Montana Resources, LLC | 1 | 423 | 89 | $25,632 | 49 |
| Golden Sunlight Mines Inc | 1 | 54 | 31 | $6,149 | 7 |
| Red Pine LLC | 1 | 4 | 4 | $604 | 0 |
| Bear Claw Mining Services | 1 | 5 | 1 | $151 | 0 |
| Troy Mine Inc. | 1 | 3 | 1 | $151 | 0 |
| Butte Blackjack Operating LLC | 1 | 11 | 0 | $0 | 0 |
| Contact Mining Company Inc | 1 | 6 | 0 | $0 | 1 |
| GCC Trident LLC | 1 | 2 | 0 | $0 | 0 |
| Montanore Minerals Corp | 1 | 3 | 0 | $0 | 0 |
Operators with the most citations in Montana
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Stillwater Mining Company | 2 | 1,569 | 1,614 | $1,554,798 | 162 |
| Montana Resources, LLC | 1 | 423 | 89 | $25,632 | 49 |
| Golden Sunlight Mines Inc | 1 | 54 | 31 | $6,149 | 7 |
| Red Pine LLC | 1 | 4 | 4 | $604 | 0 |
| United States Antimony Corp | 2 | 9 | 2 | $151 | 0 |
| Bear Claw Mining Services | 1 | 5 | 1 | $151 | 0 |
| Troy Mine Inc. | 1 | 3 | 1 | $151 | 0 |
| Butte Blackjack Operating LLC | 1 | 11 | 0 | $0 | 0 |
| Contact Mining Company Inc | 1 | 6 | 0 | $0 | 1 |
| GCC Trident LLC | 1 | 2 | 0 | $0 | 0 |
| Montanore Minerals Corp | 1 | 3 | 0 | $0 | 0 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Stillwater Mine | Stillwater Mining Company | Stillwater County, MT | Platinum group ore | 1,123 | 971 |
| East Boulder Mine | Stillwater Mining Company | Sweet Grass County, MT | Platinum group ore | 446 | 643 |
| Continental Mine | Montana Resources, LLC | Silver Bow County, MT | Copper ore | 423 | 89 |
| Golden Sunlight Mines Inc | Golden Sunlight Mines Inc | Jefferson County, MT | Gold ore | 54 | 31 |
| Red Pine Mine | Red Pine LLC | Madison County, MT | Gold ore | 4 | 4 |
| US Antimony Critical Minerals Mill | United States Antimony Corp | Broadwater County, MT | Gold ore | 2 | 2 |
| Revenue Mine | Bear Claw Mining Services | Madison County, MT | Gold ore | 5 | 1 |
| Troy Mine | Troy Mine Inc. | Lincoln County, MT | Copper ore | 3 | 1 |
| Silver Bow Mine | Butte Blackjack Operating LLC | Silver Bow County, MT | Silver ore | 11 | 0 |
| Montana Stibnite Hill Mine | United States Antimony Corp | Sanders County, MT | Antimony ore | 7 | 0 |
| Contact Concentrator | Contact Mining Company Inc | Granite County, MT | Gold ore | 6 | 0 |
| Montanore Project | Montanore Minerals Corp | Lincoln County, MT | Silver ore | 3 | 0 |
| Black Butte Mine | GCC Trident LLC | Meagher County, MT | Iron ore | 2 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Gold ore | 7 | 46.7% |
| Copper ore | 2 | 13.3% |
| Platinum group ore | 2 | 13.3% |
| Silver ore | 2 | 13.3% |
| Antimony ore | 1 | 6.7% |
| Iron ore | 1 | 6.7% |
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 | 265 | 39 | $268,220 | 48 |
| 2023 | 317 | 39 | $141,574 | 66 |
| 2024 | 528 | 76 | $344,632 | 57 |
| 2025 | 389 | 47 | $390,372 | 30 |
| 2026 | 255 | 39 | $444,622 | 18 |
Standards cited most at metal ore mines in Montana
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 | 132 |
| 30 CFR 57.12032 | Underground metal and nonmetal mines | 93 |
| 30 CFR 57.4201 | Underground metal and nonmetal mines | 85 |
| 30 CFR 57.14100 | Underground metal and nonmetal mines | 75 |
| 30 CFR 57.11001 | Underground metal and nonmetal mines | 71 |
| 30 CFR 57.3200 | Underground metal and nonmetal mines | 60 |
| 30 CFR 57.8531 | Underground metal and nonmetal mines | 50 |
| 30 CFR 57.4104 | Underground metal and nonmetal mines | 44 |
| 30 CFR 57.12028 | Underground metal and nonmetal mines | 43 |
| 30 CFR 57.12018 | Underground metal and nonmetal mines | 42 |
| 30 CFR 57.12004 | Underground metal and nonmetal mines | 37 |
| 30 CFR 57.12006 | Underground metal and nonmetal mines | 36 |
| 30 CFR 57.8528 | Underground metal and nonmetal mines | 35 |
| 30 CFR 57.20011 | Underground metal and nonmetal mines | 34 |
| 30 CFR 57.3360 | Underground metal and nonmetal mines | 33 |
Injury and illness cases at metal ore mines in Montana
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Fatality | 2 |
| Permanent disability | 6 |
| Days away from work or restricted activity | 123 |
| No lost time, or an occupational illness | 88 |
What the accident reports at metal ore mines in Montana describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 51 |
| Slip or fall of person | 37 |
| Machinery | 35 |
| Disorders (repeated trauma) | 28 |
| Handtools (nonpowered) | 21 |
| Powered haulage | 20 |
| Fall of roof or back | 17 |
| Other | 4 |
| Striking or bumping | 3 |
| Stepping or kneeling on object | 3 |
Equipment named in accident reports at metal ore mines in Montana
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 21 |
| Hand tools (powered) | 10 |
| Ore haulage trucks - off highway trucks | 9 |
| Rock drill | 9 |
| Mancar | 8 |
| Mucking machine | 7 |
| Carriage-mounted drills | 6 |
| Front-end loader | 5 |
| Rock or roof bolting machine | 5 |
| Load-haul-dump | 3 |
Updated November 6, 2026. Read from US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets. 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.