Key Takeaway
Plant #66 is a active surface mine producing Stone, located in Onalaska, La Crosse County, WI. It has 30 violations on record (5 S&S) and $4K in proposed penalties. Operated by Milestone Materials Div/Mathy Construction Co.
Plant #66
Operator: Milestone Materials Div/Mathy Construction Co
Controller: Mathy Construction Company
Location: Onalaska, La Crosse County, WI
Employees: 3
Recent Violations
View all 30 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 04/01/2025 | 46.9(a) | Non-S&S | ModNegligence | $151 |
| 04/01/2025 | 56.4402 | Non-S&S | LowNegligence | $151 |
| 04/01/2025 | 56.14209(b) | Non-S&S | ModNegligence | $151 |
| 04/01/2025 | 56.14107(a) | Non-S&S | ModNegligence | $151 |
| 04/01/2025 | 56.14112(b) | S&S | HighNegligence | $642 |
| 10/21/2024 | 56.11012 | Non-S&S | HighNegligence | $189 |
| 10/03/2023 | 56.14132(a) | Non-S&S | LowNegligence | $143 |
| 11/17/2021 | 56.12004 | Non-S&S | LowNegligence | $125 |
| 10/13/2020 | 56.14100(c) | Non-S&S | LowNegligence | $123 |
| 10/30/2017 | 56.11012 | Non-S&S | LowNegligence | $118 |
| 10/30/2017 | 56.4101 | Non-S&S | LowNegligence | $118 |
| 07/13/2016 | 56.12004 | Non-S&S | ModNegligence | $114 |
| 06/11/2013 | 56.12023 | Non-S&S | ModNegligence | $100 |
| 06/11/2013 | 56.12004 | Non-S&S | LowNegligence | $100 |
| 10/19/2011 | 56.13011 | Non-S&S | ModNegligence | $100 |
| 10/19/2011 | 56.12004 | Non-S&S | ModNegligence | $100 |
| 10/19/2011 | 56.12032 | Non-S&S | ModNegligence | $100 |
| 10/19/2011 | 56.12004 | Non-S&S | ModNegligence | $100 |
| 10/19/2011 | 56.12004 | Non-S&S | LowNegligence | $100 |
| 03/29/2011 | 56.14100(b) | Non-S&S | LowNegligence | $100 |
Accidents & Injuries
View all 11 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 08/01/2018 | MACHINERY | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 03/21/2016 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 9d lost |
| 12/04/2014 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 11d lost, 55d restricted |
| 09/18/2013 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 09/17/2009 | HANDTOOLS (NONPOWERED) | DAYS RESTRICTED ACTIVITY ONLY | 5d restricted |
| 07/30/2007 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 04/30/2007 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 1d lost |
| 10/20/2005 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 07/11/2005 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 2d lost, 61d restricted |
| 03/02/2005 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
Inspections
View all 36 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 02/17/2026 | 02/19/2026 | 18.00 | 1 |
| 03/31/2025 | 04/03/2025 | 26.75 | 1 |
| 10/21/2024 | 10/22/2024 | 9.75 | 1 |
| 08/28/2024 | 08/28/2024 | 8.25 | 1 |
| 10/03/2023 | 10/05/2023 | 19.25 | 1 |
| 06/27/2023 | 06/28/2023 | 7.00 | 1 |
| 11/17/2021 | 11/18/2021 | 7.25 | 1 |
| 10/13/2020 | 10/14/2020 | 15.75 | 1 |
| 10/03/2019 | 10/03/2019 | 12.75 | 1 |
| 06/17/2019 | 06/17/2019 | 9.75 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Plant #66 have?
Plant #66 has 30 MSHA violations on record, of which 5 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $4K.
What type of mine is Plant #66?
Plant #66 is a Surface mine producing Stone, located in Onalaska, La Crosse County, WI. It currently has 3 employees.
Has anyone been injured or killed at Plant #66?
According to MSHA records, Plant #66 has 11 reported accident/injury records and 0 fatalities on file.
Who operates Plant #66?
Plant #66 is operated by Milestone Materials Div/Mathy Construction Co and controlled by Mathy Construction Company. MSHA Mine ID: 4703274.