Data / Mines / Montana / Yellowstone County
Mines in Yellowstone County, Montana: 14 open mines
MSHA lists 14 open mines in Yellowstone County, Montana, run by 9 operators and employing 37 people. Since January 1, 2022 its inspectors issued 38 citations and orders there with $6,545 in proposed penalties, and operators reported 3 injury or illness cases. The operators with the most open mines are Croell, Inc.; Fisher Sand & Gravel Company; Huppert Brothers Construction Inc.. Data from MSHA, November 6, 2026.
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- Open mines
- 14
- Operators
- 9
- Employees
- 37
- Temporarily Idled
- 7
- Intermittent
- 5
- Active
- 2
- Mines run by individuals, counted and not listed
- 4
- Citations and orders since January 1, 2022
- 38
- Significant and substantial
- 5 (13.2%)
- Closure orders
- 0
- High negligence or reckless
- 3
- Proposed penalties
- $6,545
- Amount paid so far
- $6,243
- Inspections
- 88
- Inspector hours on site
- 319
- Citations per inspection
- 0.43 (all mines 2.30)
- Accident reports
- 3
- Injury and illness cases
- 3
- Fatalities
- 0
- Latest MSHA record
- October 30, 2026
Operators with the most open mines in Yellowstone 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 |
|---|---|---|---|---|---|
| Croell, Inc. | 3 | 7 | 11 | $1,283 | 1 |
| Fisher Sand & Gravel Company | 1 | 7 | 8 | $1,041 | 2 |
| Huppert Brothers Construction Inc. | 1 | 5 | 4 | $2,157 | 0 |
| Yellowstone County Road Department | 1 | 1 | 4 | $588 | 0 |
| Matriarch Construction, Inc. | 1 | 2 | 3 | $445 | 0 |
| Aggregate Resources, Inc. | 1 | 2 | 2 | $302 | 0 |
| Midwest Materials | 1 | 0 | 0 | $0 | 0 |
| Millennium Construction & Consulting, Inc. | 1 | 2 | 0 | $0 | 0 |
Operators with the most citations in Yellowstone 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 |
|---|---|---|---|---|---|
| Croell, Inc. | 3 | 7 | 11 | $1,283 | 1 |
| Fisher Sand & Gravel Company | 1 | 7 | 8 | $1,041 | 2 |
| Huppert Brothers Construction Inc. | 1 | 5 | 4 | $2,157 | 0 |
| Yellowstone County Road Department | 1 | 1 | 4 | $588 | 0 |
| Matriarch Construction, Inc. | 1 | 2 | 3 | $445 | 0 |
| Aggregate Resources, Inc. | 1 | 2 | 2 | $302 | 0 |
| Midwest Materials | 1 | 0 | 0 | $0 | 0 |
| Millennium Construction & Consulting, Inc. | 1 | 2 | 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 |
|---|---|---|---|---|---|
| West Crusher #7 | Croell, Inc. | Yellowstone County, MT | Construction sand and gravel | 3 | 10 |
| Fisher Industries Plant 15 | Fisher Sand & Gravel Company | Yellowstone County, MT | Construction sand and gravel | 7 | 8 |
| Clarks Fork Quarry | Huppert Brothers Construction Inc. | Yellowstone County, MT | Dimension stone | 5 | 4 |
| Crusher Plant #1 | Yellowstone County Road Department | Yellowstone County, MT | Construction sand and gravel | 1 | 4 |
| Metso HP 200 | Matriarch Construction, Inc. | Yellowstone County, MT | Construction sand and gravel | 2 | 3 |
| Tract 2 Site | Aggregate Resources, Inc. | Yellowstone County, MT | Construction sand and gravel | 2 | 2 |
| West Wash Plant #12 | Croell, Inc. | Yellowstone County, MT | Construction sand and gravel | 2 | 1 |
| Croell Portable #1 | Croell, Inc. | Yellowstone County, MT | Construction sand and gravel | 2 | 0 |
| Millennium Materials | Millennium Construction & Consulting, Inc. | Yellowstone County, MT | Construction sand and gravel | 2 | 0 |
| Worden Gravel Pit | Midwest Materials | Yellowstone County, MT | Construction sand and gravel | 0 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 13 | 92.9% |
| Dimension stone | 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 | 3 | 0 | $399 | 0 |
| 2023 | 7 | 0 | $1,001 | 1 |
| 2024 | 10 | 0 | $1,470 | 2 |
| 2025 | 9 | 0 | $1,359 | 0 |
| 2026 | 9 | 5 | $2,316 | 0 |
Standards cited most at mines in Yellowstone 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 56.12030 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 4 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 4 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.4200 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12016 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.20008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14206 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 1 |
| 30 CFR 47.54 | Hazard communication | 1 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at mines in Yellowstone County, Montana
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 2 |
| No lost time, or an occupational illness | 1 |
What the accident reports at mines in Yellowstone County, Montana describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 1 |
| Handtools (nonpowered) | 1 |
| Other | 1 |
Equipment named in accident reports at mines in Yellowstone County, Montana
| Equipment | Reports |
|---|---|
| Hand tools (powered) | 1 |
| Hand tools (not powered) | 1 |
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.