Key Takeaway
Dewey Plant is a active surface mine producing SandAndGravel, located in Mesa, Yavapai County, AZ. It has 305 violations on record (109 S&S) and $108K in proposed penalties. Operated by MDI Mining.
Dewey Plant
Operator: MDI Mining
Controller: Michael Denny
Location: Mesa, Yavapai County, AZ
Employees: 8
Recent Violations
View all 305 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 04/24/2025 | 56.15001 | Non-S&S | ModNegligence | $193 |
| 04/24/2025 | 46.9 | Non-S&S | HighNegligence | $177 |
| 12/03/2024 | 56.14100(b) | Non-S&S | HighNegligence | $305 |
| 12/03/2024 | 56.14100(b) | Non-S&S | ModNegligence | $147 |
| 12/03/2024 | 56.12004 | Non-S&S | ModNegligence | $147 |
| 12/03/2024 | 56.14205 | Non-S&S | ModNegligence | $147 |
| 09/16/2024 | 56.14100(c) | S&S | ModNegligence | $147 |
| 09/16/2024 | 56.4104(a) | Non-S&S | ModNegligence | $147 |
| 05/29/2024 | 50.10(d) | Non-S&S | $0 | |
| 05/29/2024 | 50.10(d) | S&S | HighNegligence | $2,945 |
| 05/29/2024 | 56.6306(e) | S&S | HighNegligence | $2,945 |
| 05/29/2024 | 50.12 | Non-S&S | HighNegligence | $147 |
| 04/03/2024 | 56.11001 | S&S | ModNegligence | $147 |
| 04/03/2024 | 56.14107(a) | Non-S&S | LowNegligence | $147 |
| 04/03/2024 | 56.11001 | Non-S&S | LowNegligence | $147 |
| 04/03/2024 | 56.12032 | Non-S&S | LowNegligence | $147 |
| 04/03/2024 | 56.12013(b) | Non-S&S | LowNegligence | $147 |
| 11/08/2023 | 50.30(a) | Non-S&S | HighNegligence | $143 |
| 11/08/2023 | 56.14107(a) | Non-S&S | ModNegligence | $143 |
| 05/31/2023 | 56.14100(c) | Non-S&S | $0 |
Accidents & Injuries
View all 4 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 08/10/2020 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 4d restricted |
| 02/19/2008 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 4d lost, 5d restricted |
| 03/12/2007 | POWERED HAULAGE | DAYS AWAY FROM WORK ONLY | 2d lost |
| 12/07/2006 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
Inspections
View all 102 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 10/08/2025 | 10/08/2025 | 9.75 | 1 |
| 04/24/2025 | 04/24/2025 | 10.50 | 1 |
| 12/17/2024 | 12/17/2024 | 3.75 | 1 |
| 12/03/2024 | 12/09/2024 | 15.00 | 1 |
| 09/16/2024 | 09/16/2024 | 8.75 | 1 |
| 05/28/2024 | 06/03/2024 | 11.50 | 2 |
| 04/02/2024 | 04/04/2024 | 20.00 | 1 |
| 11/08/2023 | 11/09/2023 | 12.25 | 1 |
| 07/28/2023 | 07/28/2023 | 5.50 | 1 |
| 05/31/2023 | 06/01/2023 | 4.75 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Dewey Plant have?
Dewey Plant has 305 MSHA violations on record, of which 109 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $108K.
What type of mine is Dewey Plant?
Dewey Plant is a Surface mine producing SandAndGravel, located in Mesa, Yavapai County, AZ. It currently has 8 employees.
Has anyone been injured or killed at Dewey Plant?
According to MSHA records, Dewey Plant has 4 reported accident/injury records and 0 fatalities on file.
Who operates Dewey Plant?
Dewey Plant is operated by MDI Mining and controlled by Michael Denny. MSHA Mine ID: 0202633.