Data / Mines / Arizona / Stone mines
Stone mines in Arizona: 68 open mines and MSHA citations
MSHA lists 68 open stone mines in Arizona, run by 48 operators and employing 953 people. Since January 1, 2022 its inspectors issued 1,274 citations and orders there with $755,268 in proposed penalties, and operators reported 79 injury or illness cases. The operators with the most open mines are Rock Pros USA; Drake Stone Products Inc; Dunbar Stone Company Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 68
- Operators
- 48
- Employees
- 953
- Active
- 37
- Intermittent
- 25
- Temporarily Idled
- 5
- New Mine
- 1
- Mines run by individuals, counted and not listed
- 7
- Citations and orders since January 1, 2022
- 1,274
- Significant and substantial
- 253 (19.9%)
- Closure orders
- 43
- High negligence or reckless
- 103
- Proposed penalties
- $755,268
- Amount paid so far
- $633,094
- Inspections
- 626
- Inspector hours on site
- 4,703
- Citations per inspection
- 2.04 (all mines 2.30)
- Accident reports
- 80
- Injury and illness cases
- 79
- Fatalities
- 0
- Latest MSHA record
- October 28, 2026
Operators with the most open mines in Arizona
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
Operators with the most citations in Arizona
Citations and orders issued since January 1, 2022 at their open mines here.
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 |
|---|---|---|---|---|---|
| Drake Cement | Drake Cement LLC | Yavapai County, AZ | Cement | 111 | 215 |
| Crusher #1 | Rock Pros USA | Pinal County, AZ | Crushed, broken stone | 5 | 76 |
| White Hills | Rock Pros USA | Mohave County, AZ | Crushed, broken granite | 5 | 69 |
| Nelson Quarry & Plant | Martin Marietta Materials, Inc. | Coconino County, AZ | Lime | 84 | 67 |
| Rillito Plant | CalPortland Company | Pima County, AZ | Cement | 150 | 58 |
| Hillside Plant | Kilauea Crushers Inc | Maricopa County, AZ | Crushed, broken stone | 8 | 57 |
| Chloride | Rock Pros USA | Mohave County, AZ | Crushed, broken granite | 5 | 57 |
| Picacho Plant | Kilauea Crushers Inc | Maricopa County, AZ | Crushed, broken granite | 20 | 56 |
| Silver Bell | Rock Pros USA | Pima County, AZ | Dimension stone | 3 | 46 |
| Clarkdale Facility | Phoenix Cement | Yavapai County, AZ | Cement | 185 | 41 |
| Superior | Rock Pros USA | Pinal County, AZ | Crushed, broken granite | 14 | 39 |
| Big Horn Mine | Custom Landscape Materials LLC | Maricopa County, AZ | Crushed, broken stone | 8 | 39 |
| Cedar Hills Site | C S Mc Crossan Construction Inc | Mohave County, AZ | Crushed, broken granite | 16 | 30 |
| Miller Mine | Miller Mining, Inc. | Coconino County, AZ | Crushed, broken stone | 2 | 30 |
| Desert Queen | Desert Queen Quarry LLC | Pinal County, AZ | Lime | 4 | 28 |
| KB-1 | Custom Landscape Materials LLC | Maricopa County, AZ | Crushed, broken stone | 4 | 23 |
| Santa Rita Plan | Cimbar Resources | Pima County, AZ | Crushed, broken limestone | 17 | 19 |
| Mesa Mine | Red Mountain Mining, Inc. | Maricopa County, AZ | Crushed, broken granite | 7 | 19 |
| Star Valley Granite & Materials | Star Valley Granite & Materials | Gila County, AZ | Crushed, broken granite | 2 | 19 |
| Red Pit Mine | Red Pit Mine | Coconino County, AZ | Crushed, broken stone | 6 | 18 |
| Chase-2wh | Chase Crushing LLC | Mohave County, AZ | Crushed, broken stone | 3 | 18 |
| Omya Arizona | Omya Inc | Pinal County, AZ | Crushed, broken marble | 28 | 17 |
| 359501 | Ames Construction Inc | Greenlee County, AZ | Crushed, broken stone | 14 | 13 |
| Wash Plant | Interstate Rock Products Inc | Coconino County, AZ | Crushed, broken stone | 2 | 13 |
| Madison Granite Pit | Madison Granite Supply Inc | Maricopa County, AZ | Crushed, broken granite | 17 | 12 |
| Treasure Chest Granite Pit LLC | Treasure Chest Granite Pit LLC | Pinal County, AZ | Crushed, broken granite | 10 | 12 |
| Hardluck Quarry | Brimhall Sand & Rock & Building Materials | Navajo County, AZ | Crushed, broken stone | 10 | 11 |
| Owens Pit | Perkins Cinders Inc | Navajo County, AZ | Crushed, broken stone | 9 | 11 |
| Em Materials LLC (Kirkland) | Em Materials, LLC | Yavapai County, AZ | Cement | 0 | 11 |
| Rillito Quarry | CalPortland Company | Pima County, AZ | Crushed, broken stone | 23 | 10 |
| Crusher #2 | Rock Pros USA | Yavapai County, AZ | Crushed, broken stone | 6 | 10 |
| Outerspace Pit | Willcox Rock & Sand Inc | Cochise County, AZ | Crushed, broken stone | 3 | 9 |
| Rockhouse Quarry | Drake Stone Products Inc | Yavapai County, AZ | Dimension sandstone | 15 | 8 |
| Mills | Harley Gray Stone Company | Yavapai County, AZ | Crushed, broken sandstone | 10 | 7 |
| Apache County Limestone Pit | Apache County Engineering | Apache County, AZ | Crushed, broken limestone | 4 | 7 |
| Boyer Gap | Rock Pros USA | La Paz County, AZ | Crushed, broken stone | 3 | 7 |
| Portable Crusher No. 3 | Rango Inc. | Gila County, AZ | Lime | 5 | 6 |
| Hayhook LLC DBA Hayhook Sand and Gravel | Sierra Mining and Crushing LLC | Cochise County, AZ | Crushed, broken stone | 5 | 6 |
| Portec 48cone Crusher | Maddux & Sons Inc | Cochise County, AZ | Crushed, broken stone | 4 | 6 |
| Hall Pit | Perkins Cinders Inc | Apache County, AZ | Crushed, broken stone | 2 | 6 |
| Partridge T23N R3W &27 | Harley Gray Stone Company | Coconino County, AZ | Dimension sandstone | 8 | 5 |
| Fisher Industries Plant #39 | Fisher Sand & Gravel Company | Maricopa County, AZ | Crushed, broken stone | 2 | 5 |
| Howard Mason Materials | Howard Mesa Materials L.L.C. | Coconino County, AZ | Crushed, broken stone | 2 | 5 |
| Mine #5 | Superstition Crushing L.L.C. | Cochise County, AZ | Crushed, broken stone | 4 | 4 |
| Rock Ridge Quarries | Rock Ridge Quarries, Inc. | Yavapai County, AZ | Dimension stone | 41 | 3 |
| Diamond 7 | Drake Stone Products Inc | Coconino County, AZ | Dimension sandstone | 3 | 3 |
| M C Canyon Quarry | Drake Stone Products Inc | Yavapai County, AZ | Dimension sandstone | 3 | 3 |
| Hualapai Chocolate | Dunbar Stone Company Inc | Mohave County, AZ | Dimension stone | 5 | 2 |
| L.P.'s Cinder Pitt, LLC | L.P.'s Cinder Pitt, LLC | Coconino County, AZ | Crushed, broken stone | 2 | 2 |
| Bobbitt Silica | Smithco Ent Inc | Gila County, AZ | Crushed, broken sandstone | 1 | 2 |
| Sheep Hill Cinder Mine | The Landscape Connection Commercial Supply Yard | Coconino County, AZ | Crushed, broken stone | 7 | 1 |
| Upper Bell | Rock Pros USA | Yavapai County, AZ | Crushed, broken stone | 4 | 1 |
| Quartz Mountain Materials | White Spar Mining Company LLC | Yavapai County, AZ | Crushed, broken stone | 3 | 1 |
| L48 Aggregate Process Unit 001 | Conam Construction Company | Gila County, AZ | Crushed, broken stone | 5 | 0 |
| Diamond 7 Oak | Drake Stone Products Inc | Coconino County, AZ | Dimension sandstone | 4 | 0 |
| Smithco Portable 2 | Smithco Ent Inc | Pima County, AZ | Crushed, broken stone | 4 | 0 |
| Roeder Et All | Dunbar Stone Company Inc | Coconino County, AZ | Crushed, broken stone | 3 | 0 |
| Hilltop and Corva | Dunbar Stone Company Inc | Coconino County, AZ | Dimension sandstone | 3 | 0 |
| Douglas Plant | Martin Marietta Materials, Inc. | Cochise County, AZ | Lime | 2 | 0 |
| Yellow Buck Matterhorn & Buckskin | Dunbar Stone Company Inc | Coconino County, AZ | Dimension stone | 0 | 0 |
| Sundt #1 | Sundt Construction Inc. | Pinal County, AZ | Crushed, broken stone | 0 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Crushed, broken stone | 31 | 45.6% |
| Crushed, broken granite | 9 | 13.2% |
| Dimension stone | 7 | 10.3% |
| Dimension sandstone | 7 | 10.3% |
| Cement | 4 | 5.9% |
| Lime | 4 | 5.9% |
| Crushed, broken limestone | 2 | 2.9% |
| Crushed, broken sandstone | 2 | 2.9% |
| Crushed, broken marble | 1 | 1.5% |
| Dimension marble | 1 | 1.5% |
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 | 218 | 36 | $76,816 | 13 |
| 2023 | 386 | 98 | $312,249 | 19 |
| 2024 | 278 | 51 | $180,613 | 21 |
| 2025 | 194 | 42 | $140,283 | 13 |
| 2026 | 198 | 26 | $45,307 | 13 |
Standards cited most at stone mines in Arizona
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 56.14107 | Surface metal and nonmetal mines | 133 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 114 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 85 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 60 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 59 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 58 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 48 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 38 |
| 30 CFR 47.41 | Hazard communication | 37 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 35 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 33 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 31 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 30 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 30 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 23 |
Injury and illness cases at stone mines in Arizona
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 1 |
| Days away from work or restricted activity | 50 |
| No lost time, or an occupational illness | 28 |
What the accident reports at stone mines in Arizona describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 19 |
| Slip or fall of person | 16 |
| Powered haulage | 9 |
| Machinery | 8 |
| Other | 7 |
| Handtools (nonpowered) | 6 |
| Disorders (repeated trauma) | 5 |
| Striking or bumping | 2 |
| Electrical | 2 |
| Stepping or kneeling on object | 2 |
Equipment named in accident reports at stone mines in Arizona
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 6 |
| Hand tools (powered) | 5 |
| Forklift | 4 |
| Elevator | 3 |
| Conveyor | 2 |
| Ore haulage trucks - off highway trucks | 2 |
| Front-end loader | 2 |
| Rock drill | 1 |
| Shuttle car | 1 |
| Chute | 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.