Mining Incidents

Plant #26 Metal/Non-Metal

Mosinee, Marathon County, WI  ·  Intermittent
MSHA Mine ID: 4702928

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Fatalities
0
Total incidents
33
Years on record
2000–2025
Latest incident
Jun 2025
Compliance record
MSHA citations since 2000
36
citations
6
significant & substantial
$4,986
proposed penalties
$4,986
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 6,309 0 0 0.0
2025 Q3 12,102 0 0 0.0
2025 Q1 2,937 0 0 0.0
2024 Q2 12,333 1 0 81.1
2024 Q1 2,265 0 0 0.0
2023 Q4 0 0 0
2023 Q3 9,688 0 0 0.0
2023 Q2 10,920 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

33 on file

2025 · 1 incident

June 17, 2025 WI · Metal/Non-Metal master mechanic, foreman, supervisor MACHINERY
Milestone Materials Div/Mathy Construction Co · Struck by... (Not Elsewhere Classified)

Operator set down a grinder while cutting disk was still spinning, disk contacted the conveyor belt and jumped to the side. The spinning disk contacted the back of the operators hand and caused a laceration to the hand. Laceration required stiches to close.

2024 · 2 incidents

2023 · 2 incidents

March 21, 2023 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer MACHINERY
Milestone Materials Div/Mathy Construction Co · Struck by... (Not Elsewhere Classified)

Employee was loosening a bolt with impact wrench. Employee tried to hold bolt in place with hand, when bolt head spun and cut hand.

2022 · 1 incident

2019 · 1 incident

2018 · 1 incident

August 6, 2018 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Milestone Materials Div/Mathy Construction Co · Fall to the walkway or working surface

Slipped while carrying tools and supplies, causing small laceration to right knee. Wound became infected a week later. Employee was treated for the infection at that time.

2017 · 2 incidents

October 17, 2017 WI · Metal/Non-Metal crusher attendant/operator, pan feeder operator/worker HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Struck by falling object

Operator cut their finger when they lost grip while placing a large bolt in the jaw crusher. Bolt landed on the right index finger causing a small laceration to finger tip requiring 3 stiches to close.

March 21, 2017 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Milestone Materials Div/Mathy Construction Co · Fall to the walkway or working surface

While removing railing section and tossing to ground, railing caught operator clothing and pulled over the side. Operator fell to ground injuring back.

2015 · 1 incident

2013 · 1 incident

July 1, 2013 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

Ee was helping to lift a wire screen cloth over a railing when he pinched his right ring finger between the screen and railing.

2009 · 2 incidents

August 7, 2009 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Over-exertion (Not Elsewhere Classified)

Climbing down steps of Volvo haul truck, EE felt pain in his lower back. Possibly pre-existing condition.

2006 · 1 incident

October 18, 2006 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Milestone Materials Div/Mathy Construction Co · Struck by... (Not Elsewhere Classified)

While replacing bracket using the air gun to spin off the bolts on top. Right was on the bottom holding the bolt up when the air gun jammed on, causing the bolt to spin resulting in a laceration on his finger.

2005 · 3 incidents

May 14, 2005 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Milestone Materials Div/Mathy Construction Co · Struck by... (Not Elsewhere Classified)

Employee was directing other employee who was operating hammer to break rock in the jaw when the hammer slipped off the rock and lunged over crushing EE's hand.

March 22, 2005 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Milestone Materials Div/Mathy Construction Co · Caught in, under or between a moving and a stationary object

While adjusting a conveyor belt the wrench got caught in the tailroller and wedge employees hand between the wrench and the tailroller adjusting bracket.

2004 · 1 incident

March 31, 2004 WI · Metal/Non-Metal outside foreman, leadman HANDLING OF MATERIALS

EMPLOYEE WAS SHOVELING DIRT FROM UNDER CONVEYOR IN DOGHOUSE. WHILE DOING SO, DIRT GOT UNDER SAFETY GLASSES AND IN HIS EYE. EMPLOYEE SOUGHT MEDICAL TREATMENT AND RECEIVED A PRESCRIPTION.

2003 · 2 incidents

2002 · 1 incident

June 7, 2002 WI · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Over-exertion in pulling or pushing objects

EMPLOYEE WAS ON HIS STOMACH/ SIDE SWITCHING OUT A CONVEYER ROLLER. THE ROLLER GOT CAUGHT ON THE CONVEYER BELT AND HE GAVE IT A TUG RESULTING IN PAIN IN HIS LOWER BACK.

2001 · 7 incidents

August 16, 2001 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Struck by falling object

WHILE LIFTING A CUTTING EDGE WITH ANOTHER PERSON, THEY ATTEMPTED TO DROP IT IN THE LOADER BUCKET, HOWEVER, IT LANDED ON EE'S FOOT.

June 2, 2001 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Milestone Materials Div/Mathy Construction Co · Over-exertion (Not Elsewhere Classified)

WHILE CHANGING THE JAW ON THE PRIMARY, EE CRAWLED INSIDE TO TIGHTEN SOME BOLTS. HE WAS PUSHING WITH HIS LEGS WHEN HE FELT SOMETHING POP. HE IS TREATING CURRENTLY.

May 15, 2001 WI · Metal/Non-Metal rock driller HANDTOOLS (NONPOWERED)
Milestone Materials Div/Mathy Construction Co · Caught in, under or between a moving and a stationary object

EE WAS TRYING TO SEPARATE A PIECE OF STEEL FROM THE DRILL STEEL WITH A PIPE WRENCH. IT SLIPPED OFF AND CAUGHT HIS LT RING FINGER BETWEEN THE WRENCH AND FRAME. THE LACERATION REQUIRED STITCHES.

May 10, 2001 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Absorption of radiations, caustics, toxic and noxious substances

WHILE MOVING A PARTIAL FULL BARREL OF FREEZTROL THE BARREL STRUCK THE GROUND AND PRODUCT SPLASHED OUT. EE WAS SPLASHED ON HIS UPPER BODY AS WELLAS ON HIS FACE AND UNDER HIS GLASSES.

April 6, 2001 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Milestone Materials Div/Mathy Construction Co · Over-exertion (Not Elsewhere Classified)

WHEN TAKING MACHINE APART, PULLING ON A WRENCH EE FELT SOMETHING SNAP IN HIS RT WRIST. SOUGHT MEDICAL ATTENTION.

2000 · 4 incidents

July 24, 2000 WI · Metal/Non-Metal miner, nec HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Over-exertion (Not Elsewhere Classified)

EE WAS PUTTING THE CAP ON THE CONE OF THE CRUSHER-AFTERWARDS HE HAD A STOMACH ACHE. ONCE HE GOT HOME. HIS STOMACH STARTED TO SWELL. HE WENT TO THE HOSPITAL AND WAS DIAGNOSED WITH A HERNIA.

May 25, 2000 WI · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Struck by... (Not Elsewhere Classified)

WHILE INSTALLING SIDE LINERS IN THE JAW OF THE CRUSHER USING HOOK ON A SPLITTER CABLE. WHEN THERE WAS PRESSURE APPLIED TO LIFT THE LINER, THE FREE HOOK SPUN AROUND SMASHING HIS LEFT HAND.