Mining Incidents

Warren Quarry Metal/Non-Metal

Warren, Carbon County, MT  ·  Active
MSHA Mine ID: 2402306

Warren Quarry has $18K in proposed MSHA penalties and $0 outstanding across 2 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
23
Years on record
2003–2026
Latest incident
May 2026
Compliance record
MSHA citations since 2003
133
citations
23
significant & substantial
$17,815
proposed penalties
$17,715
paid to date
99% of proposed penalties paid to date, a $100 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2003
61
inspections on record
1,770
inspection hours
7.5
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.
133 citations across 1,770 inspection hours.
Source: MSHA inspections data, updated weekly.

Warren Quarry has $18K in proposed MSHA penalties and $0 outstanding across 2 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.
$18K
proposed penalties
$18K
current assessed
$18K
paid to date
$0
outstanding
132 assessments are final orders; 2 contested dockets.
As of the most recent assessment on 2025-12-16.
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 7,772 1 0 128.7
2025 Q3 8,115 1 0 123.2
2025 Q2 7,762 0 0 0.0
2025 Q1 8,027 0 0 0.0
2024 Q4 7,250 1 0 137.9
2024 Q3 7,728 3 0 388.2
2024 Q2 7,038 0 0 0.0
2024 Q1 6,848 6 2 876.2
Show 84 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 6,451 0 0 0.0
2023 Q3 6,913 0 0 0.0
2023 Q2 7,238 0 0 0.0
2023 Q1 7,924 0 0 0.0
2022 Q4 6,640 0 0 0.0
2022 Q3 7,496 2 1 266.8
2022 Q2 7,350 0 0 0.0
2022 Q1 7,332 1 1 136.4
2021 Q4 7,040 0 0 0.0
2021 Q3 7,987 1 0 125.2
2021 Q2 7,747 0 0 0.0
2021 Q1 8,093 1 0 123.6
2020 Q4 7,062 0 0 0.0
2020 Q3 8,194 0 0 0.0
2020 Q2 8,380 0 0 0.0
2020 Q1 7,506 0 0 0.0
2019 Q4 7,321 0 0 0.0
2019 Q3 7,936 0 0 0.0
2019 Q2 7,611 0 0 0.0
2019 Q1 7,365 0 0 0.0
2018 Q4 6,913 0 0 0.0
2018 Q3 7,414 0 0 0.0
2018 Q2 7,599 0 0 0.0
2018 Q1 8,012 0 0 0.0
2017 Q4 7,686 2 1 260.2
2017 Q3 8,247 0 0 0.0
2017 Q2 8,223 0 0 0.0
2017 Q1 8,464 1 0 118.1
2016 Q4 8,036 0 0 0.0
2016 Q3 9,075 2 0 220.4
2016 Q2 9,215 0 0 0.0
2016 Q1 8,733 4 0 458.0
2015 Q4 8,128 0 0 0.0
2015 Q3 9,641 0 0 0.0
2015 Q2 9,743 0 0 0.0
2015 Q1 9,377 2 0 213.3
2014 Q4 8,660 0 0 0.0
2014 Q3 9,835 2 1 203.4
2014 Q2 8,607 0 0 0.0
2014 Q1 8,480 2 1 235.8
2013 Q4 7,973 0 0 0.0
2013 Q3 8,798 2 0 227.3
2013 Q2 9,154 0 0 0.0
2013 Q1 8,624 0 0 0.0
2012 Q4 8,798 2 1 227.3
2012 Q3 8,408 0 0 0.0
2012 Q2 7,541 0 0 0.0
2012 Q1 7,592 0 0 0.0
2011 Q4 7,430 0 0 0.0
2011 Q3 7,509 0 0 0.0
2011 Q2 7,765 0 0 0.0
2011 Q1 8,111 2 0 246.6
2010 Q4 8,143 0 0 0.0
2010 Q3 7,966 8 2 1004.3
2010 Q2 8,133 0 0 0.0
2010 Q1 8,648 10 1 1156.3
2009 Q4 8,298 0 0 0.0
2009 Q3 9,111 3 1 329.3
2009 Q2 8,719 0 0 0.0
2009 Q1 8,661 13 2 1501.0
2008 Q4 8,830 0 0 0.0
2008 Q3 8,933 0 0 0.0
2008 Q2 10,493 0 0 0.0
2008 Q1 11,773 25 4 2123.5
2007 Q4 9,850 0 0 0.0
2007 Q3 8,939 0 0 0.0
2007 Q2 9,139 4 0 437.7
2007 Q1 8,937 0 0 0.0
2006 Q4 9,714 0 0 0.0
2006 Q3 8,330 4 2 480.2
2006 Q2 8,609 0 0 0.0
2006 Q1 8,801 11 1 1249.9
2005 Q4 8,362 0 0 0.0
2005 Q3 8,289 0 0 0.0
2005 Q2 8,092 4 0 494.3
2005 Q1 7,742 0 0 0.0
2004 Q4 8,154 0 0 0.0
2004 Q3 7,810 0 0 0.0
2004 Q2 8,250 1 0 121.2
2004 Q1 8,379 9 2 1074.1
2003 Q4 7,974 0 0 0.0
2003 Q3 8,003 0 0 0.0
2003 Q2 7,982 1 0 125.3
2003 Q1 7,754 2 0 257.9
No fatalities recorded at this mine.

Reportable incidents

23 on file

2026 · 1 incident

May 11, 2026 MT · Metal/Non-Metal welder (non-shop) HANDLING OF MATERIALS
Montana Limestone Company · Struck against stationary object

Employee was kneeling down on a roof to hold a string line when EE scratched EE's left knee on an exposed screw. The scratch became infected a few weeks later and required medical attention.

2022 · 2 incidents

September 27, 2022 MT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Montana Limestone Company · Over-exertion (Not Elsewhere Classified)

Employee was walking on uneven ballast setting the unit train railcar brakes when EE stepped wrong and over extended EE' right knee. The employee saw a doctor and was not placed on restrictions and had not missed work. On Oct 13, the employee saw a surgeon and it was determined EE would need surgery. The employee is still able to work full duty, but did miss a full shift on Oct 13.

January 27, 2022 MT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Montana Limestone Company · Caught in, under or between a moving and a stationary object

Employee was rebuilding a dodge gear box. As the employee turned over the box, it fell on the tip of EE's right hand index finger, crushing the tip. The employee requested only first aid treatment at the time of the injury. The finger continued to bother EE and EE went to the Dr. on 2/10/22 and the diagnosis was a broken bone at the tip of the index finger.

2019 · 2 incidents

August 29, 2019 MT · Metal/Non-Metal miner, prospector, nec HANDLING OF MATERIALS
Montana Limestone Company · Caught in, under or between a moving and a stationary object

During the activity of removing the adjustment bolts from the bearing housing, a punch was used to support one side of the bearing, the employee pulled out the support punch and stored energy caught EE's hand between the bearing and adjustment housing.

July 30, 2019 MT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Montana Limestone Company · Over-exertion in lifting objects

Employee was shoveling off a belt that was overloaded.

2018 · 5 incidents

December 19, 2018 MT · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver ALL OTHER OCCUPATIONAL ILLNESSES
Montana Limestone Company · (Not Elsewhere Classified)

Operator was operating a haul truck when they had an asthma attack possibly triggered by second hand smoke.

June 1, 2018 MT · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON
Montana Limestone Company · Fall onto or against objects

Cleaning mirror on truck and EE slipped. Grabbed for the mirror and cut EE's hand as a result (stitches required).

May 8, 2018 MT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Montana Limestone Company · Over-exertion in lifting objects

Fork had come off the skid steer. Employee was lifting and pulling to reinstall the detached fork. While performing this activity, the employee strained EE's right arm bicep

February 20, 2018 MT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Montana Limestone Company · Fall to the walkway or working surface

Roughly noon on Tuesday, Feb 20, ee were on top of the new water tank checking the heat trace to make sure it was working. EE was at one inspection hole and as ee stood up to walk to the other inspection hole, feet slid out from underneath. EE landed on bottom and didn't think much of it the time. As the day progressed ee became more sore.

January 19, 2018 MT · Metal/Non-Metal miner, prospector, nec HANDLING OF MATERIALS
Montana Limestone Company · Over-exertion in lifting objects

Taking an empty bag and filling with 50 lbs limestone product, lifting full bag off a table (waist height) and pivoting 180 degrees, bending to place at ground level onto a wood pallet. Repeat process until pallet is 10 rows high of full bags (shoulder height). Injury to neck is undetermined at this time.

2017 · 1 incident

March 7, 2017 MT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Montana Limestone Company · Over-exertion (Not Elsewhere Classified)

The employee was clearing a beam of built up limestone with employee's foot to install expanded metal to prevent pigeons from accessing the plant, when employee twisted and sprained employee's left knee.

2016 · 1 incident

March 9, 2016 MT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech FIRE
Montana Limestone Company · Contact with hot objects or substances

Employee was cutting the temporary bracing out of the pin mill frame when a leak occurred in the oxygen hose causing EE's glove to fill with oxygen. A spark from the cutting ignited the glove.

2014 · 3 incidents

December 16, 2014 MT · Metal/Non-Metal drill operator HANDTOOLS (NONPOWERED)
Montana Limestone Company · Struck by... (Not Elsewhere Classified)

Contractor was replacing the cable on his drill. As he was trying to get the cable off the pulley, he used a pry bar to pull out the cable. While he was applying force, the pry bar slipped and struck him on the left eye brow. The brow line was cut and he received two stitches.

September 2, 2014 MT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Montana Limestone Company · Over-exertion in lifting objects

employee was shoveling material on to a conveyor belt, turned his body wrong and strained the left shoulder and a possible partial tear of the left bicep.

August 25, 2014 MT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Montana Limestone Company · Struck by... (Not Elsewhere Classified)

Mechanic was removing cutting edges on the 988H loader. As he was holding the bolts in place with a gloved hand, the bolt head spun, cutting thru the glove into the palm of his hand.

2013 · 1 incident

November 15, 2013 MT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Montana Limestone Company · Struck by falling object

Bearing out of return roller on conveyor allowing the roller to become dislodged from the pin. Roller fell approx 20' grazing employee's hard hat and left shoulder impacting hand on hand rail. Laceration to palm of left hand requiring seven stitches.

2009 · 1 incident

August 14, 2009 MT · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Montana Limestone Company · Over-exertion in lifting objects

The employee was helping with the rigging for picking the cone bonnet on and off to adjust the setting and injured his right bicep.

2008 · 1 incident

May 2, 2008 MT · Metal/Non-Metal welder (shop) HANDTOOLS (NONPOWERED)
Montana Limestone Company · Struck by... (Not Elsewhere Classified)

Contractor Welder failed to keep his finger from a pinch point between the hammer handle he was swinging and the steel members he was removing from a screen. He smashed the little finger of his right hand incurring a contusion and separation of finger tip from bone.

2007 · 1 incident

September 18, 2007 MT · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Montana Limestone Company · Struck against a moving object

EE was operating production FEL loading haul truck w/shotrock. A rock 2" in diameter rolled down muckpile between L. front & rear wheel. He did not see rock and ran over the rock W/L front wheel while backing out of the muckpile W/ a loaded bucket. The resulting impact jarring motion hurt his back. Miner reported need for medical attention on 10/17/2007.

2006 · 2 incidents

April 14, 2006 MT · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Montana Limestone Company · Over-exertion in pulling or pushing objects

Employee climbed onto stationary equipment & shoveled rock from equipment decks throughout the day. He did not seek medical treatment until 9/7/06 at which time it was determined he has a hernia. Last working day was Wed. 9/6/06. Is taking antibiotics for a related infection, then will schedule appointment with surgeon.

February 10, 2006 MT · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON
Montana Limestone Company · Fall to the walkway or working surface

EE was walking down a ramp area after checking to make sure his trailers were lined up under the customer product load out.EE slipped and fell backwards using his left arm to catch his fall. EE left shoulder was sore however he did not go to a clinic until 02/12/2006 received pain pills and continued his normal work schedule.

2004 · 1 incident

March 9, 2004 MT · Metal/Non-Metal welder (shop) POWERED HAULAGE
Montana Limestone Company · Caught in, under or between (Not Elsewhere Classified)

WHILE PICKING TORCH CART OFF OF BUCKET TRUCK WITH AUTO CRANE, PUSHED CART AWAY FROM BOOM. CART HUNG UP ON BOOM, PINCHNG FINGER BETWEEN CART AND BOOM.

2003 · 1 incident

November 4, 2003 MT · Metal/Non-Metal

WHILE HELPING TO PUT A MILL TABLE ON, REACHED ACROSS MILL TO SET TABLE IN. FELT SOMETHING IN GROIN PULL. DOES NOT HURT-JUST A FAINT BURN. EE SOUGHT MEDICAL TREATMENT ON 11/28/03 WHERE IT WA S DETERMINED HE HAS A HERNIA - HE HAS AN APPOINTMENT WITH A SPECIALIST ON 12/15/03: IS CURRENTLY WORKING.

For insurers, brokers, and safety consultants

The full compliance file on Warren 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.