Data / Mines / Montana / Sanders County
Mines in Sanders County, Montana: 14 open mines
MSHA lists 14 open mines in Sanders County, Montana, run by 10 operators and employing 52 people. Since January 1, 2022 its inspectors issued 55 citations and orders there with $9,601 in proposed penalties, and operators reported 7 injury or illness cases. The operators with the most open mines are Block Mountain Slate & Stone Inc; Montana Solid Rock Quarry, Inc; Sanders County. Data from MSHA, November 6, 2026.
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- Open mines
- 14
- Operators
- 10
- Employees
- 52
- Intermittent
- 10
- Active
- 3
- Temporarily Idled
- 1
- Mines run by individuals, counted and not listed
- 1
- Citations and orders since January 1, 2022
- 55
- Significant and substantial
- 4 (7.3%)
- Closure orders
- 1
- High negligence or reckless
- 5
- Proposed penalties
- $9,601
- Amount paid so far
- $8,784
- Inspections
- 72
- Inspector hours on site
- 236
- Citations per inspection
- 0.76 (all mines 2.30)
- Accident reports
- 7
- Injury and illness cases
- 7
- Fatalities
- 0
- Latest MSHA record
- October 1, 2026
Operators with the most open mines in Sanders County, 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 |
|---|---|---|---|---|---|
| Block Mountain Slate & Stone Inc | 3 | 9 | 10 | $1,454 | 7 |
| Montana Solid Rock Quarry, Inc | 2 | 10 | 7 | $1,041 | 0 |
| Sanders County | 2 | 4 | 1 | $151 | 0 |
| Perma Stone Inc | 1 | 5 | 18 | $3,326 | 0 |
| Montana Rock Products Inc | 1 | 4 | 16 | $2,359 | 0 |
| Fisher Sand & Gravel Company | 1 | 7 | 2 | $1,127 | 0 |
| Plains Ready Mix, Inc. | 1 | 1 | 0 | $0 | 0 |
| Thompson River Ready Mix Inc. | 1 | 3 | 0 | $0 | 0 |
| United States Antimony Corp | 1 | 7 | 0 | $0 | 0 |
Operators with the most citations in Sanders County, 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 |
|---|---|---|---|---|---|
| Perma Stone Inc | 1 | 5 | 18 | $3,326 | 0 |
| Montana Rock Products Inc | 1 | 4 | 16 | $2,359 | 0 |
| Block Mountain Slate & Stone Inc | 3 | 9 | 10 | $1,454 | 7 |
| Montana Solid Rock Quarry, Inc | 2 | 10 | 7 | $1,041 | 0 |
| Fisher Sand & Gravel Company | 1 | 7 | 2 | $1,127 | 0 |
| Sanders County | 2 | 4 | 1 | $151 | 0 |
| Plains Ready Mix, Inc. | 1 | 1 | 0 | $0 | 0 |
| Thompson River Ready Mix Inc. | 1 | 3 | 0 | $0 | 0 |
| United States Antimony Corp | 1 | 7 | 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 |
|---|---|---|---|---|---|
| Camas Site #1 | Perma Stone Inc | Sanders County, MT | Dimension stone | 5 | 18 |
| Perma Quarry | Montana Rock Products Inc | Sanders County, MT | Construction sand and gravel | 4 | 16 |
| Montana Solid Rock Quarry #4 | Montana Solid Rock Quarry, Inc | Sanders County, MT | Dimension stone | 7 | 6 |
| Portable Crew #1 | Block Mountain Slate & Stone Inc | Sanders County, MT | Dimension stone | 2 | 6 |
| Portable Crew #3 | Block Mountain Slate & Stone Inc | Sanders County, MT | Dimension sandstone | 4 | 3 |
| Fisher Industries Plant 20 | Fisher Sand & Gravel Company | Sanders County, MT | Construction sand and gravel | 7 | 2 |
| Portable Crew #2 | Block Mountain Slate & Stone Inc | Sanders County, MT | Dimension stone | 3 | 1 |
| Montana Solid Rock Quarry #3 | Montana Solid Rock Quarry, Inc | Sanders County, MT | Dimension sandstone | 3 | 1 |
| District #3 Screening Plant | Sanders County | Sanders County, MT | Construction sand and gravel | 2 | 1 |
| Montana Stibnite Hill Mine | United States Antimony Corp | Sanders County, MT | Antimony ore | 7 | 0 |
| Thompson River Ready Mix Inc. | Thompson River Ready Mix Inc. | Sanders County, MT | Construction sand and gravel | 3 | 0 |
| Read Screen All | Sanders County | Sanders County, MT | Construction sand and gravel | 2 | 0 |
| Plains Ready Mix, Inc. | Plains Ready Mix, Inc. | Sanders County, MT | Construction sand and gravel | 1 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 7 | 50% |
| Dimension stone | 4 | 28.6% |
| Dimension sandstone | 2 | 14.3% |
| Antimony ore | 1 | 7.1% |
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 | 4 | 0 | $542 | 1 |
| 2023 | 19 | 1 | $2,997 | 3 |
| 2024 | 10 | 1 | $1,858 | 1 |
| 2025 | 20 | 2 | $3,902 | 2 |
| 2026 | 2 | 0 | $302 | 0 |
Standards cited most at mines in Sanders County, 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 50.30 | Reporting of accidents, injuries and illnesses | 12 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.1000 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4402 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.23002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14103 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.15003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at mines in Sanders County, Montana
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 5 |
| No lost time, or an occupational illness | 2 |
What the accident reports at mines in Sanders County, Montana describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 3 |
| Slip or fall of person | 2 |
| Handling of materials | 2 |
Equipment named in accident reports at mines in Sanders County, Montana
| Equipment | Reports |
|---|---|
| Dimension stone machinery | 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.