Mining Incidents

Iron Mountain Quarry Metal/Non-Metal

Iron Mountain, St Francois County, MO  ·  Active
MSHA Mine ID: 2300210

Iron Mountain Quarry has $16K in proposed MSHA penalties and $604 outstanding across 7 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
44
Years on record
1998–2026
Latest incident
Feb 2026
Compliance record
MSHA citations since 2000
107
citations
20
significant & substantial
$15,893
proposed penalties
$15,289
paid to date
96% of proposed penalties paid to date, a $604 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
76
inspections on record
1,475
inspection hours
7.3
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.
107 citations across 1,475 inspection hours.
Source: MSHA inspections data, updated weekly.

Iron Mountain Quarry has $16K in proposed MSHA penalties and $604 outstanding across 7 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.
$16K
proposed penalties
$16K
current assessed
$15K
paid to date
$604
outstanding
103 assessments are final orders; 7 contested dockets.
As of the most recent assessment on 2026-05-11.
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 18,841 0 0 0.0
2025 Q3 22,359 0 0 0.0
2025 Q2 24,221 5 0 206.4
2025 Q1 19,568 2 0 102.2
2024 Q4 18,974 0 0 0.0
2024 Q3 22,527 3 0 133.2
2024 Q2 22,008 0 0 0.0
2024 Q1 21,078 0 0 0.0
Show 96 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 18,862 5 1 265.1
2023 Q3 18,469 3 0 162.4
2023 Q2 24,876 0 0 0.0
2023 Q1 14,290 0 0 0.0
2022 Q4 20,218 0 0 0.0
2022 Q3 20,212 0 0 0.0
2022 Q2 21,187 0 0 0.0
2022 Q1 11,882 2 0 168.3
2021 Q4 19,460 0 0 0.0
2021 Q3 16,459 0 0 0.0
2021 Q2 20,560 2 0 97.3
2021 Q1 13,882 1 0 72.0
2020 Q4 14,035 0 0 0.0
2020 Q3 20,708 4 0 193.2
2020 Q2 26,383 0 0 0.0
2020 Q1 14,182 3 1 211.5
2019 Q4 17,931 0 0 0.0
2019 Q3 19,780 0 0 0.0
2019 Q2 20,883 3 1 143.7
2019 Q1 15,981 0 0 0.0
2018 Q4 10,449 1 1 95.7
2018 Q3 20,761 0 0 0.0
2018 Q2 20,017 1 0 50.0
2018 Q1 11,388 2 0 175.6
2017 Q4 6,588 0 0 0.0
2017 Q3 20,915 0 0 0.0
2017 Q2 27,175 2 0 73.6
2017 Q1 12,718 0 0 0.0
2016 Q4 16,075 6 2 373.3
2016 Q3 38,032 0 0 0.0
2016 Q2 38,114 3 1 78.7
2016 Q1 26,141 0 0 0.0
2015 Q4 31,894 3 1 94.1
2015 Q3 35,210 3 1 85.2
2015 Q2 33,829 0 0 0.0
2015 Q1 18,098 0 0 0.0
2014 Q4 22,845 3 1 131.3
2014 Q3 31,793 0 0 0.0
2014 Q2 27,093 1 0 36.9
2014 Q1 10,500 0 0 0.0
2013 Q4 7,379 3 1 406.6
2013 Q3 23,250 0 0 0.0
2013 Q2 21,877 3 1 137.1
2013 Q1 14,279 2 0 140.1
2012 Q4 20,850 0 0 0.0
2012 Q3 30,156 0 0 0.0
2012 Q2 27,642 5 2 180.9
2012 Q1 24,572 0 0 0.0
2011 Q4 25,125 4 1 159.2
2011 Q3 40,134 5 1 124.6
2011 Q2 36,517 0 0 0.0
2011 Q1 23,442 2 0 85.3
2010 Q4 34,805 0 0 0.0
2010 Q3 36,084 1 1 27.7
2010 Q2 28,103 0 0 0.0
2010 Q1 14,414 1 0 69.4
2009 Q4 15,971 0 0 0.0
2009 Q3 29,915 0 0 0.0
2009 Q2 34,795 1 0 28.7
2009 Q1 18,460 0 0 0.0
2008 Q4 25,391 2 1 78.8
2008 Q3 33,076 0 0 0.0
2008 Q2 24,656 0 0 0.0
2008 Q1 16,505 1 0 60.6
2007 Q4 15,503 0 0 0.0
2007 Q3 19,543 0 0 0.0
2007 Q2 21,946 3 0 136.7
2007 Q1 16,170 0 0 0.0
2006 Q4 14,588 0 0 0.0
2006 Q3 19,631 0 0 0.0
2006 Q2 18,488 0 0 0.0
2006 Q1 12,934 0 0 0.0
2005 Q4 12,056 1 0 82.9
2005 Q3 11,962 0 0 0.0
2005 Q2 9,108 0 0 0.0
2005 Q1 6,322 0 0 0.0
2004 Q4 5,595 0 0 0.0
2004 Q3 6,147 0 0 0.0
2004 Q2 6,339 0 0 0.0
2004 Q1 5,839 0 0 0.0
2003 Q4 5,839 0 0 0.0
2003 Q3 5,521 0 0 0.0
2003 Q2 5,122 0 0 0.0
2003 Q1 4,817 0 0 0.0
2002 Q4 5,636 0 0 0.0
2002 Q3 6,197 0 0 0.0
2002 Q2 5,544 1 0 180.4
2002 Q1 4,775 2 0 418.8
2001 Q4 4,410 0 0 0.0
2001 Q3 5,220 0 0 0.0
2001 Q2 4,923 0 0 0.0
2001 Q1 4,310 2 0 464.0
2000 Q4 5,460 0 0 0.0
2000 Q3 5,299 0 0 0.0
2000 Q2 5,636 4 2 709.7
2000 Q1 5,641 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

44 on file

2026 · 1 incident

February 24, 2026 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
New Frontier Materials Operations Beta, LLC · Fall to the walkway or working surface

The employee was performing maintenance using a wrench. Wrench slipped off a bolt, causing the employee to lose balance and fall backwards into a shelf then onto the ground. The employee tried to brace themselves with their left arm injuring it.

2025 · 3 incidents

July 1, 2025 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
New Frontier Materials Operations Beta, LLC · Struck by... (Not Elsewhere Classified)

The employee was picking up debris in the shop and got a metal splinter in EE's fingernail, which was removed by medical professional. (Note: The employee was provided with gloves but was not wearing them when the injury occurred.)

June 11, 2025 MO · Metal/Non-Metal welder (non-shop) OTHER
New Frontier Materials Operations Beta, LLC · Bodily reaction, (Not Elsewhere Classified)

The employee was in the shop welding on a secured 988 loader bucket. The employee was working laying down on their left side and started to roll onto their right side and felt pain in their back.

May 19, 2025 MO · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
New Frontier Materials Operations Beta, LLC · Over-exertion (Not Elsewhere Classified)

The employee was operating a CAT 988K loader, with left-handed joystick, when the employee turned their hand outward, EE experienced pain. On 6.27.25 employee started physical therapy.

2024 · 2 incidents

May 14, 2024 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
New Frontier Materials Operations Beta, LLC · Struck by flying object

The employee was removing old mops from a 992-loader bucket when a piece of steel chipped off and hit EE's finger.

February 15, 2024 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
New Frontier Materials Operations Beta, LLC · Over-exertion (Not Elsewhere Classified)

The employee was replacing hammer on a drill, while removing it from the truck bed it slipped. While attempting to catch the hammer they hyperextended their arm, injuring their right bicep.

2021 · 3 incidents

August 26, 2021 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
New Frontier Materials Operations Beta, LLC · Struck by flying object

Employee was removing a bearing that had been cut with a torch, using a hammer. A piece of steel came off the bearing and struck the employee in the chest. Two stitches used to close the wound.

July 23, 2021 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
New Frontier Materials Operations Beta, LLC · Struck by... (Not Elsewhere Classified)

Employee stated was cutting a piece of belting with a razor knife when the knife broke loose and cut self in the leg. Employee received two stitches to close the wound.

February 3, 2021 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Iron Mountain Trap Rock Company · Struck against a moving object

Employee stated EE was operating a skid steer with an extended rake in the bucket, when the rake fell out EE ran over the rake causing the skid steer to bounce.

2020 · 1 incident

August 5, 2020 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Iron Mountain Trap Rock Company · Caught in, under or between a moving and a stationary object

Employee stated EE was removing bolts from a cone crusher with a 1 inch impact when EE mistakenly put the impact on a separation bolt. When EE initiated the impact wrench it pinched EE's finger between the frame and the impact wrench.

2019 · 5 incidents

September 17, 2019 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Iron Mountain Trap Rock Company · Fall from machine

Employee stated was climbing up the steps on a haul truck when employee lost balance and fell.

July 19, 2019 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Iron Mountain Trap Rock Company · Struck by flying object

The employee stated EE was using a hand drill to drill a hole in EE's toolbox when the bit broke. The broken bit struck EE's safety glasses and then EE's eye.

May 21, 2019 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Iron Mountain Trap Rock Company · Struck against stationary object

Employee stated EE was climbing into a screen deck to replace a screen when EE cut hand on a sharp rock.

May 18, 2019 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Iron Mountain Trap Rock Company · Caught in, under or between a moving and a stationary object

Employee stated was installing a V belt, rolled finger between the sleeve and the v belt.

January 18, 2019 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Iron Mountain Trap Rock Company · Struck by flying object

Employee was grinding on a finishing screen, eyes were irritated the next day, went to the doctor and had small pieces of steel in eye.

2018 · 2 incidents

September 27, 2018 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Iron Mountain Trap Rock Company · Struck against stationary object

Employee stated was cutting a rubber spacer with a utility knife when EE slipped and cut hand.

July 2, 2018 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Iron Mountain Trap Rock Company · Struck by... (Not Elsewhere Classified)

Employee stated was using a razor knife to cut piece of belting and cut leg with the knife.

2017 · 1 incident

June 9, 2017 MO · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Iron Mountain Trap Rock Company · Struck against a moving object

Employee was operating a wheel loader, hit hole causing the seat to bottom out and jarred back. Employee went to doctor and restricted duty began on Aug 9.

2016 · 4 incidents

September 14, 2016 MO · Metal/Non-Metal outside foreman, leadman HANDTOOLS (NONPOWERED)
Iron Mountain Trap Rock Company · Over-exertion in pulling or pushing objects

The employee was performing maintenance at the jaw with a 24 inch crescent wrench and felt burning sensation in left bicep.

April 1, 2016 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Iron Mountain Trap Rock Company · Struck against stationary object

The employee was changing a screen and struck EE's elbow on a beam.

February 1, 2016 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Iron Mountain Trap Rock Company · Contact with hot objects or substances

Employee stated EE grabbed the handle of a tool being worked on by another employee and burned EE's hand, unaware the handle was hot.

2015 · 1 incident

July 25, 2015 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Iron Mountain Trap Rock Company · Struck by falling object

The employee was using a bar to move a tail piece, tail piece slipped and fell on his foot.

2014 · 2 incidents

February 19, 2014 MO · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Iron Mountain Trap Rock Company · Struck by... (Not Elsewhere Classified)

While an IMTR employee was unloading a drill steel from a delivery truck, the forks of the lull hung up on a cross member, when it released it pushed the drill steel onto the Fred Weber Inc. truck driver's foot.

2012 · 2 incidents

July 9, 2012 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Iron Mountain Trap Rock Company · Flash burns (welding)

Employee was using an air arc welder to remove a cone liner when a flash occurred resulting in burns to his face and neck.

May 4, 2012 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Iron Mountain Trap Rock Company · Struck by... (Not Elsewhere Classified)

Truck backing struck drill steel that was extending from a parked truck causing the drill steel to strike the employee.

2011 · 2 incidents

December 17, 2011 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator POWERED HAULAGE
Iron Mountain Trap Rock Company · Struck by flying object

Employee was walking near the de-energized crushing plant, a truck was going by and a rock struck him on the lip causing a laceration.

January 17, 2011 MO · Metal/Non-Metal ledgeman/hand, quarry man HANDLING OF MATERIALS
Iron Mountain Trap Rock Company · Struck by falling object

Employee was working under the crusher chipping welding slag and fines fell from above and went behind safety glasses into his right eye.

2010 · 2 incidents

August 5, 2010 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Iron Mountain Trap Rock Company · Struck by... (Not Elsewhere Classified)

Employee was cutting a new skirting when the razor knife slipped and lacerated his left hand. Employee received 5 stitches.

May 7, 2010 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Iron Mountain Trap Rock Company · Struck by flying object

Employee was using an air impact gun to tighten bolts on Jaw Die when a strong wind blew dust into his eyes. He had a small piece of metal imbedded into the right eye near the iris. Removed FB in ER and antibiotic eye drops given.

2008 · 1 incident

February 4, 2008 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Iron Mountain Trap Rock Company · Contact with hot objects or substances

EE reported to have burned two fingers while using a cutting torch.

2007 · 2 incidents

October 2, 2007 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Iron Mountain Trap Rock Company · Over-exertion (Not Elsewhere Classified)

EE reported he stepped down from truck tire onto a rock and twisted his left ankle.

June 16, 2007 MO · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor STRIKING OR BUMPING
Iron Mountain Trap Rock Company · Struck against stationary object

Employee alleges he cut his left calf on a metal box pallet while walking around it. Employer was notified on July 5, 2007 that the employee received stitches on the date of injury. This was confirmed through the medical provider on July 9, 2007.

2006 · 1 incident

April 28, 2006 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Iron Mountain Trap Rock Company · Struck by... (Not Elsewhere Classified)

Employee was cutting belt skirting with box knife when it slipped and cut left arm.

2005 · 2 incidents

September 14, 2005 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
Iron Mountain Trap Rock Company · Struck by falling object

EE was moving steel shaft with a crane when the dust cover slid down the shaft and landed on his right foot fracturing 2nd metatarsal.

March 15, 2005 MO · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Iron Mountain Trap Rock Company · Struck against stationary object

EE was taking a wear plate off a loader bucket, when his right hand slipped and cut his right thumb.

2001 · 2 incidents

August 9, 2001 MO · Metal/Non-Metal mine manager, mine foreman, mine owner SLIP OR FALL OF PERSON
Iron Mountain Trap Rock Company · Fall to the walkway or working surface

AFTER EXAMINING THE NEW CONVEYOR, THE EMPLOYEE CLIMBED DOWN FROM THE CONVEYOR, STEPPED ON LOOSE MATERIAL AND FELL TO THE GROUND JAMMING LEFT THUMB CAUSING DISLOCATION.

August 7, 2001 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Iron Mountain Trap Rock Company · Struck by falling object

WHILE REPLACING SCREEN ON THE CRUSHER, A METAL SCREEN PANEL FELL OVER AND STRUCK EMPLOYEE'S RIGHT ELBOW, CAUSING CONTUSION.

2000 · 1 incident

June 28, 2000 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Iron Mountain Trap Rock Company · Struck by... (Not Elsewhere Classified)

WHILE HAMMERING PIN INTO ROLLRS, PIN SLIPPED AND EMPLOYEE STRUCK LEFT THUMB WITH HAMMER CAUSING FRACTURE AND NAIL REMOVAL.

1999 · 3 incidents

September 20, 1999 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Iron Mountain Trap Rock Company · Struck by... (Not Elsewhere Classified)

WHILE USING A PRYBAR TO AID IN REMOVING A ROCK JAMMED IN CRUSHER. PRYBAR SLIPPED AND SMASHED EE S LEFT THUMB.

July 27, 1999 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Iron Mountain Trap Rock Company · Struck by... (Not Elsewhere Classified)

PRYING WITH PRYBAR WHICH SLIPPED AND STRUCK EE ON TOP OF HEAD.

January 26, 1999 MO · Metal/Non-Metal drill operator MACHINERY
Iron Mountain Trap Rock Company · Caught in, under or between a moving and a stationary object

PREPARING TO DRILL WHEN A CAUGHT FINGER BETWEEN DRILL STEM AND ROCK SURFACE SMASHING SAME 10 STITICHES.

1998 · 1 incident

June 3, 1998 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Iron Mountain Trap Rock Company · Struck by... (Not Elsewhere Classified)

CUTTING RUBBER FOR CONVEYOR WITH UTILITY KNIFE WHICH SLIPPED AND CUT LEG.

For insurers, brokers, and safety consultants

The full compliance file on Iron Mountain Quarry

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.