Key Takeaway
SILVER BELL MINING LLC is a active surface mine producing Metal, located in Tucson, Pima County, AZ. It has 441 violations on record (76 S&S) and $185K in proposed penalties. Operated by ASARCO LLC, A DELAWARE LIMITED LIABILITY COMPANY.
SILVER BELL MINING LLC
Operator: ASARCO LLC, A DELAWARE LIMITED LIABILITY COMPANY
Controller: Grupo Mexico S A B de C V
Location: Tucson, Pima County, AZ
Employees: 182
Recent Violations
View all 441 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 02/20/2026 | 56.12018 | Non-S&S | ModNegligence | $0 |
| 02/20/2026 | 50.30(a) | Non-S&S | ModNegligence | $0 |
| 02/18/2026 | 56.15001 | S&S | HighNegligence | $0 |
| 02/18/2026 | 56.15001 | Non-S&S | $0 | |
| 02/18/2026 | 48.27(a)(1) | Non-S&S | HighNegligence | $0 |
| 09/03/2025 | 56.14207 | Non-S&S | LowNegligence | $151 |
| 09/03/2025 | 56.4102 | Non-S&S | ModNegligence | $151 |
| 09/03/2025 | 56.12004 | Non-S&S | ModNegligence | $267 |
| 08/29/2024 | 50.30(a) | Non-S&S | NoNegligence | $147 |
| 08/29/2024 | 56.12032 | Non-S&S | LowNegligence | $147 |
| 08/05/2024 | 50.20-1 | Non-S&S | ModNegligence | $147 |
| 08/05/2024 | 50.20-1 | Non-S&S | ModNegligence | $147 |
| 02/21/2024 | 47.41(a) | Non-S&S | ModNegligence | $147 |
| 02/21/2024 | 56.4104(b) | Non-S&S | ModNegligence | $147 |
| 02/20/2024 | 47.41(a) | Non-S&S | ModNegligence | $147 |
| 02/20/2024 | 56.4104(b) | Non-S&S | ModNegligence | $147 |
| 02/20/2024 | 56.4102 | Non-S&S | ModNegligence | $147 |
| 02/20/2024 | 56.4104(a) | S&S | ModNegligence | $357 |
| 02/20/2024 | 56.4104(b) | S&S | ModNegligence | $357 |
| 06/01/2023 | 56.4201(b) | Non-S&S | ModNegligence | $143 |
Accidents & Injuries
View all 182 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 08/29/2025 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 05/19/2025 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 19d restricted |
| 05/14/2025 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 04/19/2025 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 20d restricted |
| 01/12/2025 | MACHINERY | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 11/21/2024 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 11/07/2024 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 8d restricted |
| 07/23/2024 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 132d lost |
| 04/12/2024 | MACHINERY | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 03/16/2024 | HANDTOOLS (NONPOWERED) | DAYS RESTRICTED ACTIVITY ONLY | 13d restricted |
Inspections
View all 111 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 02/19/2026 | 02/23/2026 | 39.50 | 2 |
| 02/18/2026 | 03/03/2026 | 34.50 | 1 |
| 11/17/2025 | 11/19/2025 | 11.50 | 1 |
| 09/03/2025 | 09/04/2025 | 42.25 | 2 |
| 04/01/2025 | 04/07/2025 | 17.75 | 1 |
| 01/14/2025 | 03/03/2025 | 5.00 | 1 |
| 12/09/2024 | 12/16/2024 | 31.00 | 1 |
| 08/26/2024 | 08/30/2024 | 31.00 | 1 |
| 08/05/2024 | 08/05/2024 | 1.00 | 1 |
| 04/26/2024 | 04/26/2024 | 8.25 | 1 |
Mine Details
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Frequently Asked Questions
How many MSHA violations does SILVER BELL MINING LLC have?
SILVER BELL MINING LLC has 441 MSHA violations on record, of which 76 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $185K.
What type of mine is SILVER BELL MINING LLC?
SILVER BELL MINING LLC is a Surface mine producing Metal, located in Tucson, Pima County, AZ. It currently has 182 employees.
Has anyone been injured or killed at SILVER BELL MINING LLC?
According to MSHA records, SILVER BELL MINING LLC has 182 reported accident/injury records and 0 fatalities on file.
Who operates SILVER BELL MINING LLC?
SILVER BELL MINING LLC is operated by ASARCO LLC, A DELAWARE LIMITED LIABILITY COMPANY and controlled by Grupo Mexico S A B de C V. MSHA Mine ID: 0200134.