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.
Warren Quarry: 133 MSHA citations Metal/Non-Metal
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
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This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.Warren Quarry has $18K in proposed MSHA penalties and $0 outstanding across 2 contested dockets.
ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.ⓘ
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.ⓘ
Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.- Settled 2 · 67%
- Vacated or withdrawn 1 · 33%
ⓘ
Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.ⓘ
A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.| Docket | Decision | Judge | Year | Proposed / upheld |
|---|---|---|---|---|
| WEST 2010-868M | Settlement | Lesnick | 2010 | $540 → $540 |
| WEST 2008-1040M | Settlement | Melick | 2009 | $200 → $100 |
ⓘ
A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.Metal and nonmetal contaminants (personal samples)
ⓘ
Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.
Last sampled: 2026-08-18
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Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.- Nuisance dust, total, <1% Qtz92 over
- Nuisance dust, respirable, <1% Qtz11
- Quartz, respirable, >1% Qtz5
- Unlisted Particulate, respirable, <1% Qtz4
Show the individual readings (33)
| Date | Contaminant | Concentration | Limit | Conc / limit | Occupation |
|---|---|---|---|---|---|
| 2004-02-05 | Nuisance dust, total, <1% Qtz | 11.29 | 10 | 1.13 | Bagging Operator |
| 2004-02-05 | Nuisance dust, total, <1% Qtz | 17.71 | 10 | 1.77 | Laborer, Bullgang |
| 2026-08-18 | Unlisted Particulate, respirable, <1% Qtz | 0.26 | Crusher Oper/Worker | ||
| 2026-08-18 | Respirable dust, <.1mg | 0 | Mechanic | ||
| 2025-08-12 | Respirable dust, <.1mg | 0 | Crusher Oper/Worker | ||
| 2025-08-12 | Quartz, respirable, >1% Qtz | 0.27 | Mechanic | ||
| 2024-03-13 | Nuisance dust, respirable, <1% Qtz | 0.45 | 10 | 0.05 | Dry Screen Plant Operator |
| 2022-02-02 | Unlisted Particulate, respirable, <1% Qtz | 0.33 | Mechanic | ||
| 2022-02-02 | Respirable dust, <.1mg | 0 | Backhoe Operator | ||
| 2022-02-02 | Unlisted Particulate, respirable, <1% Qtz | 1.62 | Crusher Oper/Worker | ||
| 2022-02-02 | Unlisted Particulate, respirable, <1% Qtz | 0.74 | Crusher Oper/Worker | ||
| 2021-01-13 | Nuisance dust, respirable, <1% Qtz | 1.34 | 10 | 0.13 | Crusher Oper/Worker |
| 2021-01-13 | Nuisance dust, respirable, <1% Qtz | 2.84 | 10 | 0.28 | Crusher Oper/Worker |
| 2021-01-13 | Nuisance dust, respirable, <1% Qtz | 7.31 | 10 | 0.73 | Crusher Oper/Worker |
| 2019-01-08 | Nuisance dust, total, <1% Qtz | 8.07 | 10 | 0.81 | Dry Screen Plant Operator |
| 2019-01-08 | Nuisance dust, total, <1% Qtz | 5.19 | 10 | 0.52 | Mechanic |
| 2014-08-20 | Quartz, respirable, >1% Qtz | 1.05 | 3.28 | 0.32 | Ball Mill Operator |
| 2014-08-20 | Quartz, respirable, >1% Qtz | 1.55 | 3.21 | 0.48 | Bagging Operator |
| 2014-08-20 | Nuisance dust, respirable, <1% Qtz | 0.42 | 10 | 0.04 | Supervisor, Co. Official |
| 2014-08-05 | Nuisance dust, respirable, <1% Qtz | 0.29 | 10 | 0.03 | Diamond Drill Operator |
| 2014-08-05 | Nuisance dust, respirable, <1% Qtz | 0.12 | 10 | 0.01 | Crusher Oper/Worker |
| 2009-08-17 | Quartz, respirable, >1% Qtz | 0.74 | 2.51 | 0.29 | Crusher Oper/Worker |
| 2009-08-17 | Nuisance dust, respirable, <1% Qtz | 0.53 | 10 | 0.05 | Truck Driver |
| 2009-08-17 | Nuisance dust, respirable, <1% Qtz | 1.43 | 10 | 0.14 | Bagging Operator |
| 2009-08-17 | Quartz, respirable, >1% Qtz | 0.17 | 1.43 | 0.12 | Crusher Oper/Worker |
| 2009-05-28 | Fibers, >5um | 0 | Crusher Oper/Worker | ||
| 2005-06-16 | Nuisance dust, total, <1% Qtz | 2 | 10 | 0.20 | Front-end Loader Operator |
| 2005-06-16 | Nuisance dust, total, <1% Qtz | 4.75 | 10 | 0.48 | Crusher Oper/Worker |
| 2004-06-23 | Nuisance dust, total, <1% Qtz | 0.9 | 10 | 0.09 | Laborer, Bullgang |
| 2004-06-23 | Nuisance dust, total, <1% Qtz | 4.79 | 10 | 0.48 | Truck Loader |
| 2004-02-05 | Nuisance dust, total, <1% Qtz | 2.56 | 10 | 0.26 | Supervisor, Co. Official |
| 2003-01-29 | Nuisance dust, respirable, <1% Qtz | 0.15 | 10 | 0.02 | Front-end Loader Operator |
| 2003-01-29 | Nuisance dust, respirable, <1% Qtz | 0.39 | 10 | 0.04 | Truck Driver |
Warren Quarry recorded 0.00 reportable injury cases per 100 full-time workers in 2025.
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This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.| Year | total case rate | days-away | fatal |
|---|---|---|---|
| 2025 * | 0.00 | 0.00 | 0.000 |
| 2024 * | 0.00 | 0.00 | 0.000 |
| 2023 * | 0.00 | 0.00 | 0.000 |
| 2022 * | 13.88 | 13.88 | 0.000 |
| 2021 * | 0.00 | 0.00 | 0.000 |
| 2020 * | 0.00 | 0.00 | 0.000 |
| 2019 * | 13.23 | 13.23 | 0.000 |
| 2018 * | 20.04 | 13.36 | 0.000 |
- Montana Limestone Company 2002 to present
| Year | Employees |
|---|---|
| 2026 | 16 |
| 2025 | 17 |
| 2024 | 17 |
| 2023 | 16 |
| 2022 | 16 |
| 2021 | 17 |
| 2020 | 16 |
| 2019 | 17 |
| 2018 | 16 |
| 2017 | 17 |
| 2016 | 19 |
| 2015 | 20 |
| 2014 | 20 |
| 2013 | 18 |
| 2012 | 18 |
| 2011 | 17 |
| 2010 | 17 |
| 2009 | 18 |
| 2008 | 20 |
| 2007 | 17 |
| 2006 | 16 |
| 2005 | 16 |
| 2004 | 15 |
| 2003 | 15 |
Warren Quarry sits in Carbon County, Montana, where the Census mining category is 4.0% of county employment.
ⓘ
County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.ⓘ
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.| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2026 Q2 | 7,768 | 0 | 0 | 0.0 |
| 2026 Q1 | 7,688 | 0 | 0 | 0.0 |
| 2025 Q4 | 7,772 | 1 | 0 | 128.7 |
| 2025 Q3 | 8,115 | 0 | 0 | 0.0 |
| 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 |
Show 86 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2024 Q2 | 7,038 | 0 | 0 | 0.0 |
| 2024 Q1 | 6,848 | 5 | 2 | 730.1 |
| 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 | 1 | 1 | 130.1 |
| 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 | 1 | 0 | 110.2 |
| 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 | 1 | 0 | 106.6 |
| 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 | 1 | 0 | 113.7 |
| 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 | 7 | 1 | 878.7 |
| 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 | 8 | 1 | 923.7 |
| 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 | 21 | 4 | 1783.7 |
| 2007 Q4 | 9,850 | 0 | 0 | 0.0 |
| 2007 Q3 | 8,939 | 0 | 0 | 0.0 |
| 2007 Q2 | 9,139 | 3 | 0 | 328.3 |
| 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 | 10 | 1 | 1136.2 |
| 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 | 7 | 1 | 835.4 |
| 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 |
Reportable incidents
23 on file2026 · 1 incident
2022 · 2 incidents
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.
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
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.
Employee was shoveling off a belt that was overloaded.
2018 · 5 incidents
Operator was operating a haul truck when they had an asthma attack possibly triggered by second hand smoke.
Cleaning mirror on truck and EE slipped. Grabbed for the mirror and cut EE's hand as a result (stitches required).
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
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.
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
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
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
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.
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.
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
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
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
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
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
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.
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
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
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.