Key Takeaway
Superior Pit & Mill is a active surface mine producing Nonmetal, located in Pinal, Pinal County, AZ. It has 143 violations on record (47 S&S) and $34K in proposed penalties. Operated by Imerys Perlite USA, Inc.
Superior Pit & Mill
Operator: Imerys Perlite USA, Inc
Controller: Imerys S A
Location: Pinal, Pinal County, AZ
Employees: 7
Recent Violations
View all 143 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 04/21/2025 | 56.14207 | Non-S&S | ModNegligence | $151 |
| 01/18/2023 | 56.12004 | S&S | ModNegligence | $318 |
| 01/18/2023 | 56.11012 | S&S | LowNegligence | $143 |
| 05/27/2021 | 56.12004 | Non-S&S | ModNegligence | $125 |
| 07/27/2020 | 56.12004 | Non-S&S | ModNegligence | $123 |
| 07/27/2020 | 56.12004 | Non-S&S | ModNegligence | $123 |
| 03/04/2020 | 56.12002 | Non-S&S | ModNegligence | $123 |
| 03/04/2020 | 50.20(a) | Non-S&S | ModNegligence | $123 |
| 05/14/2019 | 56.14107(a) | S&S | ModNegligence | $293 |
| 05/14/2019 | 56.14132(a) | Non-S&S | ModNegligence | $121 |
| 02/05/2019 | 56.14101(a)(3) | Non-S&S | ModNegligence | $121 |
| 08/09/2018 | 50.30(a) | Non-S&S | ModNegligence | $118 |
| 05/03/2017 | 48.23(c)(3) | Non-S&S | ModNegligence | $116 |
| 04/14/2017 | 56.12028 | Non-S&S | ModNegligence | $305 |
| 04/13/2017 | 56.12032 | Non-S&S | ModNegligence | $356 |
| 04/13/2017 | 56.12004 | Non-S&S | ModNegligence | $356 |
| 04/13/2017 | 56.12002 | Non-S&S | ModNegligence | $356 |
| 04/13/2017 | 56.12040 | Non-S&S | ModNegligence | $356 |
| 01/18/2017 | 56.4101 | Non-S&S | ModNegligence | $116 |
| 07/20/2016 | 56.4104(b) | Non-S&S | ModNegligence | $276 |
Accidents & Injuries
View all 11 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 06/08/2023 | MACHINERY | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 05/11/2020 | STEPPING OR KNEELING ON OBJECT | DAYS AWAY FROM WORK ONLY | 4d lost |
| 06/20/2019 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 9d lost, 16d restricted |
| 01/14/2013 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 03/24/2005 | HANDTOOLS (NONPOWERED) | DAYS RESTRICTED ACTIVITY ONLY | 1d restricted |
| 10/30/2003 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 01/20/2003 | NO VALUE FOUND | NO VALUE FOUND | None |
| 09/11/2001 | MACHINERY | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 11/10/2000 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 05/22/2000 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 3d lost |
Inspections
View all 71 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 04/21/2025 | 04/21/2025 | 6.50 | 1 |
| 10/07/2024 | 10/15/2024 | 9.00 | 1 |
| 07/01/2024 | 07/03/2024 | 11.00 | 1 |
| 11/01/2023 | 11/02/2023 | 12.00 | 1 |
| 07/05/2023 | 07/05/2023 | 7.50 | 1 |
| 01/23/2023 | 01/23/2023 | 8.00 | 1 |
| 01/18/2023 | 01/18/2023 | 9.50 | 1 |
| 09/27/2022 | 09/29/2022 | 18.50 | 1 |
| 05/12/2022 | 05/12/2022 | 6.00 | 1 |
| 01/13/2022 | 01/13/2022 | 8.00 | 1 |
Mine Details
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Frequently Asked Questions
How many MSHA violations does Superior Pit & Mill have?
Superior Pit & Mill has 143 MSHA violations on record, of which 47 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $34K.
What type of mine is Superior Pit & Mill?
Superior Pit & Mill is a Surface mine producing Nonmetal, located in Pinal, Pinal County, AZ. It currently has 7 employees.
Has anyone been injured or killed at Superior Pit & Mill?
According to MSHA records, Superior Pit & Mill has 11 reported accident/injury records and 0 fatalities on file.
Who operates Superior Pit & Mill?
Superior Pit & Mill is operated by Imerys Perlite USA, Inc and controlled by Imerys S A. MSHA Mine ID: 0201136.