Welding on jaw of crusher, after shift realized scratching in eye from foreign object due to welding.
Plant #91 Metal/Non-Metal
Controlled by
Mathy Construction Company
Black River Falls,
Jackson County,
WI
·
Active
MSHA Mine ID: 4703679
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- Fatalities
- 0
- Total incidents
- 6
- Years on record
- 2013–2026
- Latest incident
- May 2026
Compliance record
MSHA citations since 2014
14
citations
0
significant & substantial
$1,783
proposed penalties
$1,783
paid to date
Source: MSHA violations data, updated weekly.
Quarterly safety rates
Citations per million employee-hours, as reported to MSHA
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2025 Q4 | 3,632 | 0 | 0 | 0.0 |
| 2025 Q2 | 2,765 | 0 | 0 | 0.0 |
| 2025 Q1 | 0 | 1 | 0 | |
| 2024 Q4 | 0 | 0 | 0 | |
| 2024 Q2 | 0 | 3 | 0 | |
| 2023 Q4 | 2,042 | 0 | 0 | 0.0 |
| 2023 Q1 | 2,097 | 0 | 0 | 0.0 |
| 2022 Q4 | 2,980 | 0 | 0 | 0.0 |
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.
Reportable incidents
6 on file2026 · 2 incidents
May 5, 2026
WI · Metal/Non-Metal
maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech
MACHINERY
Milestone Materials Div. Mathy Construction Co. · Struck by flying object
Milestone Materials Div. Mathy Construction Co. · Struck by... (Not Elsewhere Classified)
While removing a bearing, employee struck self in face with hammer
2024 · 1 incident
April 10, 2024
WI · Metal/Non-Metal
bulldozer operator, universal operator, heavy equipment operator, operating engineer
MACHINERY
Milestone Materials Div. Mathy Construction Co. · Struck by flying object
Using a grinder to remove a bracket and at some point got a piece of steel in their eye.
2018 · 1 incident
July 16, 2018
WI · Metal/Non-Metal
bulldozer operator, universal operator, heavy equipment operator, operating engineer
HANDLING OF MATERIALS
Milestone Materials Div. Mathy Construction Co. · Caught in, under or between a moving and a stationary object
While removing support stand, finger was pinched by falling shaft top, resulting in a cut needing stiches to close.
2016 · 1 incident
March 30, 2016
WI · Metal/Non-Metal
bulldozer operator, universal operator, heavy equipment operator, operating engineer
HANDLING OF MATERIALS
Milestone Materials Div. Mathy Construction Co. · Caught in, under or between a moving and a stationary object
Moving large wooden block, finger was pinched between wooden block and steel frame. Impact to finger cause closed fractures to tip of finger.
2013 · 1 incident
December 4, 2013
WI · Metal/Non-Metal
bulldozer operator, universal operator, heavy equipment operator, operating engineer
HANDTOOLS (NONPOWERED)
Milestone Materials Div. Mathy Construction Co. · Struck by flying object
EE was hammering screen deck rail wedge pin when the wedge pin broke and one part flew up and hit EE in the lip resulting in the injury.