Data / Mines / Utah / Stone mines
Stone mines in Utah: 27 open mines and MSHA citations
MSHA lists 27 open stone mines in Utah, run by 24 operators and employing 437 people. Since January 1, 2022 its inspectors issued 592 citations and orders there with $324,936 in proposed penalties, and operators reported 47 injury or illness cases. The operators with the most open mines are Staker & Parson Companies; Mountain Valley Stone, Inc.; Stone Plus Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 27
- Operators
- 24
- Employees
- 437
- Intermittent
- 13
- Active
- 13
- Temporarily Idled
- 1
- Mines run by individuals, counted and not listed
- 1
- Citations and orders since January 1, 2022
- 592
- Significant and substantial
- 84 (14.2%)
- Closure orders
- 9
- High negligence or reckless
- 30
- Proposed penalties
- $324,936
- Amount paid so far
- $265,251
- Inspections
- 203
- Inspector hours on site
- 2,749
- Citations per inspection
- 2.92 (all mines 2.30)
- Accident reports
- 47
- Injury and illness cases
- 47
- Fatalities
- 0
- Latest MSHA record
- October 28, 2026
Operators with the most open mines in Utah
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 |
|---|---|---|---|---|---|
| Staker & Parson Companies | 2 | 29 | 89 | $81,122 | 5 |
| Mountain Valley Stone, Inc. | 2 | 27 | 21 | $2,817 | 8 |
| Stone Plus Inc | 2 | 3 | 9 | $1,777 | 0 |
| Graymont Western US Inc | 1 | 74 | 163 | $83,317 | 10 |
| Ash Grove Cement Company | 1 | 100 | 77 | $87,716 | 11 |
| Holcim (US) Incorporated | 1 | 115 | 73 | $29,035 | 5 |
| Martin Marietta Materials, Inc. | 1 | 9 | 25 | $7,084 | 1 |
| Castle Valley Stone, LLC | 1 | 8 | 20 | $3,403 | 5 |
| Oak Creek Rock Products, LLC | 1 | 2 | 20 | $12,661 | 0 |
| Bonneville Quarries | 1 | 2 | 15 | $2,976 | 0 |
| Western Construction Materials LLC | 1 | 2 | 14 | $1,955 | 0 |
| Round Valley Rock LLC | 1 | 5 | 12 | $2,016 | 0 |
| Integrity Materials Management | 1 | 2 | 9 | $1,879 | 0 |
| Holt Basin Stone LLC | 1 | 2 | 7 | $1,057 | 0 |
| Mt Moriah Stone Quarries LLC | 1 | 35 | 7 | $1,013 | 1 |
| Santaquin Calcite Co. L.C. | 1 | 2 | 7 | $1,258 | 0 |
| Solid Crushing, LLC | 1 | 1 | 6 | $1,155 | 0 |
| Star Stone Quarries | 1 | 2 | 6 | $890 | 0 |
| Dunbar Stone Company Inc | 1 | 5 | 5 | $731 | 0 |
| Glacier Rock Products LLC | 1 | 2 | 3 | $470 | 0 |
| Ameri-Can Onyx Mining, LLC | 1 | 2 | 2 | $302 | 0 |
| Anfield Resources Holding Corp. | 1 | 2 | 0 | $0 | 0 |
| Bhi | 1 | 5 | 0 | $0 | 1 |
Operators with the most citations in Utah
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Graymont Western US Inc | 1 | 74 | 163 | $83,317 | 10 |
| Staker & Parson Companies | 2 | 29 | 89 | $81,122 | 5 |
| Ash Grove Cement Company | 1 | 100 | 77 | $87,716 | 11 |
| Holcim (US) Incorporated | 1 | 115 | 73 | $29,035 | 5 |
| Martin Marietta Materials, Inc. | 1 | 9 | 25 | $7,084 | 1 |
| Mountain Valley Stone, Inc. | 2 | 27 | 21 | $2,817 | 8 |
| Castle Valley Stone, LLC | 1 | 8 | 20 | $3,403 | 5 |
| Oak Creek Rock Products, LLC | 1 | 2 | 20 | $12,661 | 0 |
| Bonneville Quarries | 1 | 2 | 15 | $2,976 | 0 |
| Western Construction Materials LLC | 1 | 2 | 14 | $1,955 | 0 |
| Round Valley Rock LLC | 1 | 5 | 12 | $2,016 | 0 |
| Stone Plus Inc | 2 | 3 | 9 | $1,777 | 0 |
| Integrity Materials Management | 1 | 2 | 9 | $1,879 | 0 |
| Holt Basin Stone LLC | 1 | 2 | 7 | $1,057 | 0 |
| Mt Moriah Stone Quarries LLC | 1 | 35 | 7 | $1,013 | 1 |
| Santaquin Calcite Co. L.C. | 1 | 2 | 7 | $1,258 | 0 |
| Solid Crushing, LLC | 1 | 1 | 6 | $1,155 | 0 |
| Star Stone Quarries | 1 | 2 | 6 | $890 | 0 |
| Dunbar Stone Company Inc | 1 | 5 | 5 | $731 | 0 |
| Glacier Rock Products LLC | 1 | 2 | 3 | $470 | 0 |
| Ameri-Can Onyx Mining, LLC | 1 | 2 | 2 | $302 | 0 |
| Anfield Resources Holding Corp. | 1 | 2 | 0 | $0 | 0 |
| Bhi | 1 | 5 | 0 | $0 | 1 |
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 |
|---|---|---|---|---|---|
| Cricket Mountain Plant & Quarry | Graymont Western US Inc | Millard County, UT | Lime | 74 | 163 |
| Leamington Cement Plant | Ash Grove Cement Company | Juab County, UT | Cement | 100 | 77 |
| Amrize Devil's Slide Plant | Holcim (US) Incorporated | Morgan County, UT | Cement | 115 | 73 |
| Pisgah Aggs | Staker & Parson Companies | Cache County, UT | Crushed, broken limestone | 7 | 72 |
| Milford Quarry | Martin Marietta Materials, Inc. | Beaver County, UT | Crushed, broken stone | 9 | 25 |
| Browns Canyon Quarry | Castle Valley Stone, LLC | Summit County, UT | Dimension sandstone | 8 | 20 |
| Oak Creek Portable | Oak Creek Rock Products, LLC | Millard County, UT | Crushed, broken sandstone | 2 | 20 |
| Keigley Quarry | Staker & Parson Companies | Utah County, UT | Crushed, broken stone | 22 | 17 |
| Mountain Valley Stone Inc | Mountain Valley Stone, Inc. | Summit County, UT | Dimension stone | 25 | 15 |
| Bonneville Quarries | Bonneville Quarries | Box Elder County, UT | Dimension stone | 2 | 15 |
| Brown Canyon Stone Works LLC | Western Construction Materials LLC | Summit County, UT | Dimension stone | 2 | 14 |
| Round Valley Rock | Round Valley Rock LLC | Morgan County, UT | Crushed, broken limestone | 5 | 12 |
| WT Portable | Integrity Materials Management | Salt Lake County, UT | Crushed, broken stone | 2 | 9 |
| Mt Moriah Quarries | Mt Moriah Stone Quarries LLC | Millard County, UT | Dimension slate | 35 | 7 |
| Kester Mine & Mill | Santaquin Calcite Co. L.C. | Utah County, UT | Crushed, broken limestone | 2 | 7 |
| Lynn Pass Quarry | Holt Basin Stone LLC | Box Elder County, UT | Crushed, broken stone | 2 | 7 |
| The Black | Stone Plus Inc | Washington County, UT | Crushed, broken stone | 1 | 7 |
| Portable 3CottonThomas/Aragonite | Star Stone Quarries | Box Elder County, UT | Dimension limestone | 2 | 6 |
| Gunnison Valley Mine | Mountain Valley Stone, Inc. | Sanpete County, UT | Dimension limestone | 2 | 6 |
| Little Creek Mesa Pit | Solid Crushing, LLC | Washington County, UT | Crushed, broken stone | 1 | 6 |
| Stardust Claims | Dunbar Stone Company Inc | Millard County, UT | Dimension sandstone | 5 | 5 |
| Glacier RockProducts LLC | Glacier Rock Products LLC | Box Elder County, UT | Dimension stone | 2 | 3 |
| Honeycomb Mine | Ameri-Can Onyx Mining, LLC | Duchesne County, UT | Crushed, broken limestone | 2 | 2 |
| Portable #1 | Stone Plus Inc | Iron County, UT | Dimension stone | 2 | 2 |
| Crusher 2 | Bhi | Washington County, UT | Crushed, broken sandstone | 5 | 0 |
| Papoose | Anfield Resources Holding Corp. | San Juan County, UT | Crushed, broken limestone | 2 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Crushed, broken stone | 7 | 25.9% |
| Crushed, broken limestone | 5 | 18.5% |
| Dimension stone | 5 | 18.5% |
| Dimension sandstone | 2 | 7.4% |
| Cement | 2 | 7.4% |
| Dimension limestone | 2 | 7.4% |
| Crushed, broken sandstone | 2 | 7.4% |
| Dimension slate | 1 | 3.7% |
| Lime | 1 | 3.7% |
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 | 82 | 19 | $26,181 | 10 |
| 2023 | 113 | 16 | $40,744 | 12 |
| 2024 | 130 | 20 | $102,341 | 2 |
| 2025 | 150 | 20 | $57,173 | 9 |
| 2026 | 117 | 9 | $98,497 | 14 |
Standards cited most at stone mines in Utah
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 56.12004 | Surface metal and nonmetal mines | 51 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 47 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 44 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 38 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 33 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 28 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 27 |
| 30 CFR 47.41 | Hazard communication | 26 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 24 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 23 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 11 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 9 |
| 30 CFR 56.4101 | Surface metal and nonmetal mines | 9 |
Injury and illness cases at stone mines in Utah
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 2 |
| Days away from work or restricted activity | 25 |
| No lost time, or an occupational illness | 20 |
What the accident reports at stone mines in Utah describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 13 |
| Handtools (nonpowered) | 11 |
| Machinery | 8 |
| Slip or fall of person | 7 |
| Other | 3 |
| Powered haulage | 3 |
| Poisoning (toxic materials) | 1 |
| All other occupational illnesses | 1 |
Equipment named in accident reports at stone mines in Utah
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 11 |
| Hand tools (powered) | 4 |
| Dimension stone machinery | 4 |
| Front-end loader | 2 |
| Crane | 1 |
| Forklift | 1 |
| Conveyor | 1 |
| Shovel | 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.