Key Takeaway
Plant 80 is a active surface mine producing SandAndGravel, located in Downing, Dunn County, WI. It has 3 violations on record (0 S&S) and $351 in proposed penalties. Operated by Milestone Materials Division of Mathy Construction.
Plant 80
Operator: Milestone Materials Division of Mathy Construction
Controller: Mathy Construction Company
Location: Downing, Dunn County, WI
Employees: 4
Recent Violations
View all 3 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 12/16/2025 | 56.14132(a) | Non-S&S | LowNegligence | $151 |
| 01/27/2016 | 56.14207 | Non-S&S | ModNegligence | $100 |
| 07/20/2011 | 47.41(a)(1) | Non-S&S | ModNegligence | $100 |
Accidents & Injuries
View all 3 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 01/26/2017 | MACHINERY | DAYS AWAY FROM WORK ONLY | 5d lost |
| 05/02/2012 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 1d lost |
| 10/24/2011 | POWERED HAULAGE | NO DYS AWY FRM WRK,NO RSTR ACT | None |
Inspections
View all 21 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 01/12/2026 | 01/13/2026 | 7.00 | 1 |
| 12/16/2025 | 12/16/2025 | 8.25 | 1 |
| 03/18/2025 | 03/18/2025 | 5.00 | 1 |
| 01/29/2025 | 01/29/2025 | 9.00 | 1 |
| 11/27/2023 | 11/30/2023 | 14.25 | 1 |
| 10/17/2023 | 10/17/2023 | 5.25 | 1 |
| 04/12/2023 | 04/12/2023 | 9.75 | 1 |
| 01/24/2023 | 01/24/2023 | 6.25 | 1 |
| 07/13/2022 | 07/13/2022 | 2.75 | 1 |
| 02/02/2022 | 02/02/2022 | 4.25 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Plant 80 have?
Plant 80 has 3 MSHA violations on record, of which 0 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $351.
What type of mine is Plant 80?
Plant 80 is a Surface mine producing SandAndGravel, located in Downing, Dunn County, WI. It currently has 4 employees.
Has anyone been injured or killed at Plant 80?
According to MSHA records, Plant 80 has 3 reported accident/injury records and 0 fatalities on file.
Who operates Plant 80?
Plant 80 is operated by Milestone Materials Division of Mathy Construction and controlled by Mathy Construction Company. MSHA Mine ID: 4703609.