Data / Mines / Arizona / Pima County
Mines in Pima County, Arizona: 25 open mines
MSHA lists 25 open mines in Pima County, Arizona, run by 15 operators and employing 2,058 people. Since January 1, 2022 its inspectors issued 943 citations and orders there with $845,452 in proposed penalties, and operators reported 260 injury or illness cases. The operators with the most open mines are CalPortland Company; Asarco LLC, a Delaware Limited Liability Company; Granite Construction Company. Data from MSHA, November 6, 2026.
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- Open mines
- 25
- Operators
- 15
- Employees
- 2,058
- Active
- 16
- Intermittent
- 3
- New Mine
- 3
- Temporarily Idled
- 2
- NonProducing
- 1
- Mines run by individuals, counted and not listed
- 4
- Citations and orders since January 1, 2022
- 943
- Significant and substantial
- 174 (18.5%)
- Closure orders
- 15
- High negligence or reckless
- 66
- Proposed penalties
- $845,452
- Amount paid so far
- $570,021
- Inspections
- 350
- Inspector hours on site
- 4,441
- Citations per inspection
- 2.69 (all mines 2.30)
- Accident reports
- 266
- Injury and illness cases
- 260
- Fatalities
- 0
- Latest MSHA record
- November 3, 2026
Operators with the most open mines in Pima County, Arizona
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 |
|---|---|---|---|---|---|
| CalPortland Company | 5 | 198 | 86 | $31,013 | 12 |
| Asarco LLC, a Delaware Limited Liability Company | 2 | 629 | 294 | $327,910 | 73 |
| Granite Construction Company | 2 | 31 | 20 | $3,917 | 1 |
| Cemex Construction Materials South LLC | 2 | 22 | 7 | $1,041 | 1 |
| Rock Pros USA | 1 | 3 | 46 | $8,502 | 0 |
| Outlaw Excavating LLC | 1 | 2 | 37 | $6,789 | 0 |
| CalMat Co | 1 | 14 | 19 | $3,621 | 0 |
| Cimbar Resources | 1 | 17 | 19 | $2,877 | 0 |
| Aggregate Industries SWR, Inc. | 1 | 4 | 13 | $3,297 | 0 |
| Spencer Construction | 1 | 0 | 10 | $1,728 | 0 |
| Churchman Sand and Gravel LLC | 1 | 4 | 9 | $1,253 | 0 |
| Copper World | 1 | 52 | 9 | $1,865 | 11 |
| GoodMark Capital Group Inc. | 1 | 4 | 5 | $764 | 0 |
| Smithco Ent Inc | 1 | 4 | 0 | $0 | 0 |
Operators with the most citations in Pima County, Arizona
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Asarco LLC, a Delaware Limited Liability Company | 2 | 629 | 294 | $327,910 | 73 |
| CalPortland Company | 5 | 198 | 86 | $31,013 | 12 |
| Rock Pros USA | 1 | 3 | 46 | $8,502 | 0 |
| Outlaw Excavating LLC | 1 | 2 | 37 | $6,789 | 0 |
| Granite Construction Company | 2 | 31 | 20 | $3,917 | 1 |
| CalMat Co | 1 | 14 | 19 | $3,621 | 0 |
| Cimbar Resources | 1 | 17 | 19 | $2,877 | 0 |
| Aggregate Industries SWR, Inc. | 1 | 4 | 13 | $3,297 | 0 |
| Spencer Construction | 1 | 0 | 10 | $1,728 | 0 |
| Churchman Sand and Gravel LLC | 1 | 4 | 9 | $1,253 | 0 |
| Copper World | 1 | 52 | 9 | $1,865 | 11 |
| Cemex Construction Materials South LLC | 2 | 22 | 7 | $1,041 | 1 |
| GoodMark Capital Group Inc. | 1 | 4 | 5 | $764 | 0 |
| Smithco Ent Inc | 1 | 4 | 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 |
|---|---|---|---|---|---|
| Mission/san Xavier/eisenhower | Asarco LLC, a Delaware Limited Liability Company | Pima County, AZ | Copper ore | 447 | 256 |
| Rillito Plant | CalPortland Company | Pima County, AZ | Cement | 150 | 58 |
| Silver Bell | Rock Pros USA | Pima County, AZ | Dimension stone | 3 | 46 |
| Silver Bell Mining LLC | Asarco LLC, a Delaware Limited Liability Company | Pima County, AZ | Copper ore | 182 | 38 |
| Tanks Wilmot Landfill | Outlaw Excavating LLC | Pima County, AZ | Construction sand and gravel | 2 | 37 |
| Santa Rita Plan | Cimbar Resources | Pima County, AZ | Crushed, broken limestone | 17 | 19 |
| Marana Plant | CalMat Co | Pima County, AZ | Construction sand and gravel | 14 | 19 |
| Swan Pit | Granite Construction Company | Pima County, AZ | Construction sand and gravel | 17 | 16 |
| Amrize Sand Crusher #2 | Aggregate Industries SWR, Inc. | Pima County, AZ | Construction sand and gravel | 4 | 13 |
| Orange Grove | CalPortland Company | Pima County, AZ | Construction sand and gravel | 16 | 11 |
| Rillito Quarry | CalPortland Company | Pima County, AZ | Crushed, broken stone | 23 | 10 |
| Spencer Material (Hayhook) | Spencer Construction | Pima County, AZ | Construction sand and gravel | 0 | 10 |
| Copper World LLC | Copper World | Pima County, AZ | Copper ore | 52 | 9 |
| River Road Plant | Churchman Sand and Gravel LLC | Pima County, AZ | Construction sand and gravel | 4 | 9 |
| Twin Peaks Aggregate | CalPortland Company | Pima County, AZ | Construction sand and gravel | 6 | 7 |
| Fraguita Mill Site | GoodMark Capital Group Inc. | Pima County, AZ | Gold ore | 4 | 5 |
| Tangerine Road Pit | Granite Construction Company | Pima County, AZ | Construction sand and gravel | 14 | 4 |
| Cemex-Pima | Cemex Construction Materials South LLC | Pima County, AZ | Construction sand and gravel | 9 | 4 |
| Cemex-Apex | Cemex Construction Materials South LLC | Pima County, AZ | Construction sand and gravel | 13 | 3 |
| Smithco Portable 2 | Smithco Ent Inc | Pima County, AZ | Crushed, broken stone | 4 | 0 |
| Empire Mountain Quarry | CalPortland Company | Pima County, AZ | Construction sand and gravel | 3 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 12 | 48% |
| Copper ore | 4 | 16% |
| Crushed, broken stone | 2 | 8% |
| Cement | 1 | 4% |
| Crushed, broken limestone | 1 | 4% |
| Dimension stone | 1 | 4% |
| Gold ore | 1 | 4% |
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 | 142 | 24 | $62,350 | 59 |
| 2023 | 135 | 13 | $69,671 | 49 |
| 2024 | 273 | 52 | $265,691 | 51 |
| 2025 | 106 | 25 | $230,286 | 53 |
| 2026 | 287 | 60 | $217,454 | 48 |
Standards cited most at mines in Pima County, 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 56.20003 | Surface metal and nonmetal mines | 111 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 85 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 74 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 41 |
| 30 CFR 47.41 | Hazard communication | 37 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 33 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 30 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 29 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 28 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 23 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 22 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 19 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 19 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 18 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 16 |
Injury and illness cases at mines in Pima County, 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 | 173 |
| No lost time, or an occupational illness | 86 |
What the accident reports at mines in Pima County, Arizona describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 85 |
| Slip or fall of person | 62 |
| Machinery | 30 |
| Handtools (nonpowered) | 27 |
| Powered haulage | 17 |
| Other | 11 |
| Disorders (physical agents) | 11 |
| Stepping or kneeling on object | 5 |
| Disorders (repeated trauma) | 3 |
| Entrapment | 3 |
Equipment named in accident reports at mines in Pima County, Arizona
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 27 |
| Hand tools (powered) | 14 |
| Ore haulage trucks - off highway trucks | 9 |
| Shovel | 8 |
| Front-end loader | 5 |
| Trucks | 4 |
| Carriage-mounted drills | 4 |
| Forklift | 3 |
| Crusher | 3 |
| Machine | 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.