Mining Incidents

Plant #26 Metal/Non-Metal

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

Plant #26 has $5K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
54
Years on record
1991–2025
Latest incident
Jun 2025
Compliance record
MSHA citations since 2000
36
citations
6
significant & substantial
$4,986
proposed penalties
$4,986
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
32
inspections on record
717
inspection hours
n/a
citations per 100 inspection hours
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
Rate withheld: 717 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Plant #26 has $5K in proposed MSHA penalties and $0 outstanding across 0 contested dockets.

Penalty disposition
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$5K
proposed penalties
$5K
current assessed
$5K
paid to date
$0
outstanding
36 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2024-06-12.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Quarterly safety rates
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
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 Q2 9,607 0 0 0.0
2025 Q1 2,937 0 0 0.0
2024 Q4 6,647 0 0 0.0
2024 Q3 11,621 0 0 0.0
2024 Q2 12,333 1 0 81.1
2024 Q1 2,265 0 0 0.0
Show 96 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 5,258 0 0 0.0
2023 Q3 9,688 0 0 0.0
2023 Q2 10,920 0 0 0.0
2023 Q1 2,082 0 0 0.0
2022 Q4 7,183 0 0 0.0
2022 Q3 10,221 0 0 0.0
2022 Q2 8,628 0 0 0.0
2022 Q1 2,054 0 0 0.0
2021 Q4 6,870 0 0 0.0
2021 Q3 9,996 1 0 100.0
2021 Q2 9,462 0 0 0.0
2021 Q1 354 0 0 0.0
2020 Q4 5,270 0 0 0.0
2020 Q3 7,854 0 0 0.0
2020 Q2 9,963 0 0 0.0
2020 Q1 3,282 0 0 0.0
2019 Q4 10,477 5 1 477.2
2019 Q3 9,763 0 0 0.0
2019 Q2 10,095 1 0 99.1
2019 Q1 2,566 0 0 0.0
2018 Q4 4,911 0 0 0.0
2018 Q3 7,562 1 0 132.2
2018 Q2 8,542 0 0 0.0
2018 Q1 3,176 0 0 0.0
2017 Q4 8,024 0 0 0.0
2017 Q3 8,592 0 0 0.0
2017 Q2 9,408 0 0 0.0
2017 Q1 564 0 0 0.0
2016 Q4 5,845 0 0 0.0
2016 Q3 7,622 0 0 0.0
2016 Q2 7,520 0 0 0.0
2016 Q1 1,305 0 0 0.0
2015 Q4 4,006 2 0 499.3
2015 Q3 8,696 0 0 0.0
2015 Q2 7,421 0 0 0.0
2015 Q1 1 0 0 0.0
2014 Q4 5,721 1 0 174.8
2014 Q3 4,936 0 0 0.0
2014 Q2 4,371 0 0 0.0
2014 Q1 1 0 0 0.0
2013 Q4 5,493 0 0 0.0
2013 Q3 7,987 0 0 0.0
2013 Q2 4,551 0 0 0.0
2013 Q1 1 0 0 0.0
2012 Q4 10,924 0 0 0.0
2012 Q3 10,618 0 0 0.0
2012 Q2 13,712 0 0 0.0
2012 Q1 6,176 0 0 0.0
2011 Q4 7,769 2 0 257.4
2011 Q3 9,784 0 0 0.0
2011 Q2 8,545 0 0 0.0
2011 Q1 462 0 0 0.0
2010 Q4 9,907 1 0 100.9
2010 Q3 11,057 0 0 0.0
2010 Q2 5,932 0 0 0.0
2010 Q1 11,388 0 0 0.0
2009 Q4 15,943 3 1 188.2
2009 Q3 12,182 0 0 0.0
2009 Q2 16,374 3 0 183.2
2009 Q1 7,748 0 0 0.0
2008 Q4 21,288 0 0 0.0
2008 Q3 17,718 0 0 0.0
2008 Q2 18,206 0 0 0.0
2008 Q1 13,395 4 0 298.6
2007 Q4 15,742 0 0 0.0
2007 Q3 14,534 3 0 206.4
2007 Q2 19,170 0 0 0.0
2007 Q1 8,122 0 0 0.0
2006 Q4 11,964 0 0 0.0
2006 Q3 11,869 0 0 0.0
2006 Q2 16,296 2 2 122.7
2006 Q1 10,206 0 0 0.0
2005 Q4 12,597 0 0 0.0
2005 Q3 14,649 0 0 0.0
2005 Q2 21,738 2 0 92.0
2005 Q1 3,343 0 0 0.0
2004 Q4 8,363 0 0 0.0
2004 Q3 15,613 0 0 0.0
2004 Q2 13,216 0 0 0.0
2004 Q1 10,776 0 0 0.0
2003 Q4 14,081 0 0 0.0
2003 Q3 11,240 0 0 0.0
2003 Q2 7,190 0 0 0.0
2003 Q1 4,309 0 0 0.0
2002 Q4 7,849 0 0 0.0
2002 Q3 9,510 0 0 0.0
2002 Q2 11,858 1 0 84.3
2002 Q1 3,980 0 0 0.0
2001 Q4 7,039 0 0 0.0
2001 Q3 7,790 0 0 0.0
2001 Q2 19,404 2 2 103.1
2001 Q1 4,459 0 0 0.0
2000 Q4 3,379 0 0 0.0
2000 Q3 8,526 0 0 0.0
2000 Q2 10,104 1 0 99.0
2000 Q1 6,778 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

54 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.

1999 · 6 incidents

August 24, 1999 WI · Metal/Non-Metal welder (shop) DISORDERS (REPEATED TRAUMA)
Milestone Materials Div/Mathy Construction Co · Over-exertion (Not Elsewhere Classified)

WHILE LIFTING METAL PLATES FOR SIDE RAIL OF CONVEYOR, EE'S WRIST BEGAN TO HURT AND IS GETTING PROGRESSIVELY WORSE. THIS CONDITION HAS BOTHERED HIM PERIODICALLY OVER THE PAST SIX MONTHS.

June 14, 1999 WI · Metal/Non-Metal drill operator POWERED HAULAGE
Milestone Materials Div/Mathy Construction Co · Struck against a moving object

EMPLOYEE WAS DRILLING WHEN HIS DRILL WAS STRUCK BY A 988B LOADER BEING OPERATED BY ANOTHER EMPLOYEE. EMPLOYEE WAS JARRED FROM THE SEAT AND HIS HIP SHIFTED, CAUSING LOW BACK PAIN.

May 21, 1999 WI · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDTOOLS (NONPOWERED)
Milestone Materials Div/Mathy Construction Co · Caught in, under or between (Not Elsewhere Classified)

WHILE CHANGING BELTS ON DRIVE MOTOR OF THE SCREEN PLANT, THE PRY BAR SLIPPED , CAUSING EE'S INDEX FINGER TO GET CAUGHT BETWEEN THE BELT AND PULLEY.

April 14, 1999 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Struck by... (Not Elsewhere Classified)

EE WAS PUTTING SIDE PANELS ON A LOADER WHEN A DOOR ON THE TOP CAME DOWN AND STRUCK HIM ON THE SHOULDER CAUSING HIM TO STRIKE HIS HEAD ON THE MACHINE.

1998 · 4 incidents

October 5, 1998 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Milestone Materials Div/Mathy Construction Co · Struck against a moving object

EE WHILE OPERATING A LOADER TRAVELED OVER A LARGE ROCK THAT APPARENTLY FELL FROM HIS BUCKET CAUSING HIM TO JAR HIS BACK

September 9, 1998 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Struck by... (Not Elsewhere Classified)

EE WAS TAKING SCREEN OFF THE SCREEN PLANT WHEN THE EDGE OF THE SCREEN CUT THE PALM OF HIS HAND NEAR HIS SMALL FINGER.

1997 · 1 incident

May 24, 1997 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Milestone Materials Div/Mathy Construction Co · Struck by... (Not Elsewhere Classified)

EE WAS USING A WEDGE TO BREAK ROCK IN JAW OF THECRUSHER. WHEN THE MATERIAL ROCK BROKE THE WEDGE WAS DRAGGED DOWN INTO THE JAW. THE CHAIN THAT WAS ATTACHED TO THE WEDGE WAS PULLED FROM WORKERS HAND CUTTING INDEX FINGER.

1996 · 1 incident

May 1, 1996 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Over-exertion in lifting objects

WORKER WAS REPLACING WEAR PLATES ON A LOADER BUCKET. HE INDICATES WHEN HE WAS LIFTING THE WEAR PLATES HE TORE A MUSCLE WHICH RESULTED IN THE HERNIATION.

1995 · 1 incident

July 5, 1995 WI · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Milestone Materials Div/Mathy Construction Co · Fall onto or against objects

EMPLOYEE SLIPPED OFF THE CATWALK OF THE FRONT END LOADER STRIKING HIS LEFT SIDE RIBS OF THE RAILING OF THE COUNTER WEIGHT. EMPLOYEE WAS CHECKING THE RADIATOR FLUID WHEN THE SLIP OCCURRED.

1994 · 3 incidents

September 1, 1994 WI · Metal/Non-Metal ledgeman/hand, quarry man SLIP OR FALL OF PERSON
Milestone Materials Div/Mathy Construction Co · Fall onto or against objects

EMPLOYEE CLIMBED INTO THE BACK OF THE FOREMAN'S PICK-UP FOR TOOL'S WHEN CLIMBING OUT HE STEPPE DOVER HTE TAILGAGE AND ONTO THE BUMPER. HIS FOOT SLIPPED FROM THE BUMPER AND HTE TAIL. GATE STR UCK HIM UNDER HIS ARM.

August 8, 1994 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Milestone Materials Div/Mathy Construction Co · Struck by... (Not Elsewhere Classified)

WHILE REPAIRING THE DRIVE CHAIN USING A PUNCH AND HAMMER EE STRUCK HIS THUMB BETWEEN HAMMER AND PUNCH.

1993 · 1 incident

1992 · 3 incidents

August 17, 1992 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Over-exertion (Not Elsewhere Classified)

47650COMPELTION OF MAINTENANCE WORK ON THE CRUSHER, NOTICE DPAIN IN HIS UPPR BACK, HOWEVER, TI SOON WENT AWAY WHILE SLEEPING TAHT NIGHT THE PAIN RETURNED TO TEH EXTENT THAT HE FELT IT NECESSAR 80360CONSULT WITH APHYSICAIN. HE IS UNCERTAIN IF A SPECIFIC INCIDENT CAUSED HIS PAIN AND/OR INJURY.

March 27, 1992 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Milestone Materials Div/Mathy Construction Co · Struck by powered moving object

I.NAME CHIPPING SLAG FROM A PIECE OF IRON AND THE CHIPPING HAMMER DEFLECTED BACK AND STRUCK HIM IN THE MOUTH CHIPPING FRONT TOOTH.

1991 · 1 incident

October 31, 1991 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

I NAME INDICATES WHILE ATTEMPTING TO REMOVE A ROCK FROM THE ROCK BOX IT SLIPPED FROM HIS HAND & LANDED ON HIS R FOOT BREAKING HIS LITTLE TOE

For insurers, brokers, and safety consultants

The full compliance file on Plant #26

A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.