Data / Mines / Arizona / Silver Bell Mining LLC
Silver Bell Mining LLC: 38 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Silver Bell Mining LLC is an active copper ore surface mine in Pima County, Arizona, operated by Asarco LLC, a Delaware Limited Liability Company with 182 employees on MSHA's record (mine ID 0200134). Since January 1, 2022 MSHA inspectors issued 38 citations and orders there with $13,722 in proposed penalties, and 19 accident reports were filed there, with 19 injury or illness cases.
The request: Watch Silver Bell Mining LLC (MSHA mine ID 0200134) in Pima County, Arizona: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0200134
- Status
- Active since February 24, 2026
- Main commodity
- Copper ore
- Mine type
- Surface
- County
- Pima County, Arizona
- Nearest town
- Tucson
- Operator
- Asarco LLC, a Delaware Limited Liability Company
- Parent company
- Grupo Mexico S a B De C V
- Employees
- 182
- MSHA field office
- Mesa South AZ Field Office
- Citations and orders since January 1, 2022
- 38
- Significant and substantial
- 5 (13.2%)
- Closure orders
- 3
- High negligence or reckless
- 6
- Proposed penalties
- $13,722
- Amount paid so far
- $4,289
- Inspections
- 21
- Inspector hours on site
- 308
- Citations per inspection
- 1.81 (all mines 2.30)
- Accident reports
- 19
- Injury and illness cases
- 19
- Fatalities
- 0
- Latest MSHA record
- November 3, 2026
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 | $720 | 1 |
| 2023 | 4 | 0 | $661 | 4 |
| 2024 | 11 | 2 | $2,037 | 6 |
| 2025 | 3 | 0 | $569 | 5 |
| 2026 | 16 | 3 | $9,735 | 3 |
Standards cited most at Silver Bell Mining LLC
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 | 4 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 4 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 3 |
| 30 CFR 56.15001 | Surface metal and nonmetal mines | 2 |
| 30 CFR 48.27 | Training of miners | 2 |
| 30 CFR 47.41 | Hazard communication | 2 |
| 30 CFR 56.4102 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 2 |
| 30 CFR 50.20-1 | Reporting of accidents, injuries and illnesses | 2 |
| 30 CFR 56.15005 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Silver Bell Mining LLC
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 13 |
| No lost time, or an occupational illness | 6 |
What the accident reports at Silver Bell Mining LLC describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Slip or fall of person | 9 |
| Handling of materials | 4 |
| Machinery | 3 |
| Handtools (nonpowered) | 2 |
| Powered haulage | 1 |
Equipment named in accident reports at Silver Bell Mining LLC
| Equipment | Reports |
|---|---|
| Hand tools (powered) | 2 |
| Hand tools (not powered) | 2 |
| Ore haulage trucks - off highway trucks | 2 |
| Trucks | 1 |
| Shovel | 1 |
| Carriage-mounted drills | 1 |
| Forklift | 1 |
Other open mines in Pima County, Arizona
| 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 |
| 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 |
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.