A contract mechanic/welder hired by another contractor was fatally injured when the ammonium nitrate auger EE was attempting to extract from a pipe exploded.
Lone Mountain Pit Metal/Non-Metal
Lone Mountain Pit has $821K in proposed MSHA penalties and $0 outstanding across 23 contested dockets, plus health sampling and the full incident record.
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Email me when a new MSHA incident is filed at Lone Mountain Pit.
- Fatalities
- 2
- Total incidents
- 34
- Years on record
- 1990–2026
- 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.Lone Mountain Pit has $821K in proposed MSHA penalties and $0 outstanding across 23 contested dockets.
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Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.ⓘ
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 |
|---|---|---|---|---|
| 2025 Q4 | 19,449 | 0 | 0 | 0.0 |
| 2025 Q3 | 18,606 | 11 | 0 | 591.2 |
| 2025 Q2 | 18,592 | 0 | 0 | 0.0 |
| 2025 Q1 | 14,710 | 9 | 2 | 611.8 |
| 2024 Q4 | 15,870 | 0 | 0 | 0.0 |
| 2024 Q3 | 26,043 | 12 | 0 | 460.8 |
| 2024 Q2 | 26,362 | 0 | 0 | 0.0 |
| 2024 Q1 | 20,315 | 0 | 0 | 0.0 |
Show 94 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2023 Q4 | 24,586 | 46 | 9 | 1871.0 |
| 2023 Q3 | 24,982 | 12 | 1 | 480.3 |
| 2023 Q2 | 20,053 | 8 | 1 | 398.9 |
| 2023 Q1 | 24,306 | 4 | 4 | 164.6 |
| 2022 Q4 | 23,991 | 0 | 0 | 0.0 |
| 2022 Q3 | 22,293 | 2 | 0 | 89.7 |
| 2022 Q2 | 24,037 | 0 | 0 | 0.0 |
| 2022 Q1 | 20,988 | 9 | 3 | 428.8 |
| 2021 Q4 | 16,138 | 0 | 0 | 0.0 |
| 2021 Q3 | 21,003 | 3 | 1 | 142.8 |
| 2021 Q2 | 19,586 | 0 | 0 | 0.0 |
| 2021 Q1 | 16,039 | 0 | 0 | 0.0 |
| 2020 Q4 | 13,041 | 11 | 4 | 843.5 |
| 2020 Q3 | 13,650 | 11 | 1 | 805.9 |
| 2020 Q2 | 15,235 | 0 | 0 | 0.0 |
| 2020 Q1 | 15,992 | 8 | 2 | 500.3 |
| 2019 Q4 | 14,063 | 0 | 0 | 0.0 |
| 2019 Q3 | 13,174 | 7 | 2 | 531.3 |
| 2019 Q2 | 13,868 | 2 | 0 | 144.2 |
| 2019 Q1 | 17,146 | 9 | 2 | 524.9 |
| 2018 Q4 | 12,458 | 0 | 0 | 0.0 |
| 2018 Q3 | 10,472 | 16 | 3 | 1527.9 |
| 2018 Q2 | 7,961 | 0 | 0 | 0.0 |
| 2018 Q1 | 6,778 | 0 | 0 | 0.0 |
| 2017 Q4 | 5,538 | 11 | 3 | 1986.3 |
| 2017 Q3 | 5,660 | 6 | 0 | 1060.1 |
| 2017 Q2 | 11,194 | 0 | 0 | 0.0 |
| 2017 Q1 | 9,364 | 18 | 6 | 1922.3 |
| 2016 Q4 | 8,687 | 0 | 0 | 0.0 |
| 2016 Q3 | 9,042 | 5 | 2 | 553.0 |
| 2016 Q2 | 7,528 | 0 | 0 | 0.0 |
| 2016 Q1 | 5,608 | 5 | 2 | 891.6 |
| 2015 Q4 | 7,809 | 0 | 0 | 0.0 |
| 2015 Q3 | 12,085 | 0 | 0 | 0.0 |
| 2015 Q2 | 8,290 | 5 | 1 | 603.1 |
| 2015 Q1 | 8,457 | 5 | 1 | 591.2 |
| 2014 Q4 | 8,839 | 0 | 0 | 0.0 |
| 2014 Q3 | 8,100 | 6 | 1 | 740.7 |
| 2014 Q2 | 13,160 | 0 | 0 | 0.0 |
| 2014 Q1 | 12,862 | 8 | 3 | 622.0 |
| 2013 Q4 | 12,786 | 12 | 3 | 938.5 |
| 2013 Q3 | 10,449 | 9 | 3 | 861.3 |
| 2013 Q2 | 17,808 | 9 | 3 | 505.4 |
| 2013 Q1 | 15,999 | 1 | 1 | 62.5 |
| 2012 Q4 | 14,183 | 0 | 0 | 0.0 |
| 2012 Q3 | 15,243 | 18 | 6 | 1180.9 |
| 2012 Q2 | 13,379 | 0 | 0 | 0.0 |
| 2012 Q1 | 11,760 | 13 | 2 | 1105.4 |
| 2011 Q4 | 15,257 | 5 | 4 | 327.7 |
| 2011 Q3 | 15,450 | 14 | 1 | 906.1 |
| 2011 Q2 | 14,940 | 0 | 0 | 0.0 |
| 2011 Q1 | 15,850 | 4 | 1 | 252.4 |
| 2010 Q4 | 17,218 | 0 | 0 | 0.0 |
| 2010 Q3 | 15,287 | 3 | 1 | 196.2 |
| 2010 Q2 | 15,125 | 28 | 13 | 1851.2 |
| 2010 Q1 | 23,380 | 47 | 20 | 2010.3 |
| 2009 Q4 | 26,700 | 0 | 0 | 0.0 |
| 2009 Q3 | 33,892 | 13 | 4 | 383.6 |
| 2009 Q2 | 36,922 | 2 | 0 | 54.2 |
| 2009 Q1 | 35,134 | 15 | 3 | 426.9 |
| 2008 Q4 | 37,507 | 0 | 0 | 0.0 |
| 2008 Q3 | 45,419 | 1 | 0 | 22.0 |
| 2008 Q2 | 61,331 | 15 | 1 | 244.6 |
| 2008 Q1 | 60,440 | 0 | 0 | 0.0 |
| 2007 Q4 | 54,111 | 8 | 1 | 147.8 |
| 2007 Q3 | 52,612 | 12 | 1 | 228.1 |
| 2007 Q2 | 61,053 | 0 | 0 | 0.0 |
| 2007 Q1 | 62,665 | 14 | 1 | 223.4 |
| 2006 Q3 | 63,275 | 14 | 7 | 221.3 |
| 2006 Q2 | 66,672 | 2 | 0 | 30.0 |
| 2005 Q4 | 61,642 | 1 | 0 | 16.2 |
| 2005 Q3 | 63,223 | 59 | 10 | 933.2 |
| 2005 Q2 | 60,431 | 2 | 0 | 33.1 |
| 2005 Q1 | 61,833 | 13 | 4 | 210.2 |
| 2004 Q4 | 66,200 | 0 | 0 | 0.0 |
| 2004 Q3 | 67,987 | 11 | 5 | 161.8 |
| 2004 Q2 | 71,515 | 1 | 0 | 14.0 |
| 2004 Q1 | 71,816 | 7 | 3 | 97.5 |
| 2003 Q4 | 68,414 | 1 | 0 | 14.6 |
| 2003 Q3 | 65,668 | 4 | 0 | 60.9 |
| 2003 Q2 | 64,434 | 5 | 1 | 77.6 |
| 2003 Q1 | 59,525 | 0 | 0 | 0.0 |
| 2002 Q4 | 57,513 | 0 | 0 | 0.0 |
| 2002 Q3 | 55,568 | 0 | 0 | 0.0 |
| 2002 Q2 | 53,602 | 20 | 8 | 373.1 |
| 2002 Q1 | 52,354 | 0 | 0 | 0.0 |
| 2001 Q4 | 52,012 | 0 | 0 | 0.0 |
| 2001 Q3 | 46,560 | 6 | 0 | 128.9 |
| 2001 Q2 | 60,914 | 0 | 0 | 0.0 |
| 2001 Q1 | 44,758 | 0 | 0 | 0.0 |
| 2000 Q4 | 48,118 | 0 | 0 | 0.0 |
| 2000 Q3 | 44,554 | 11 | 0 | 246.9 |
| 2000 Q2 | 48,764 | 0 | 0 | 0.0 |
| 2000 Q1 | 44,354 | 0 | 0 | 0.0 |
Fatalities at this mine
2 recordedAT 21:10 HE WAS ASSIGNED TO PUSH MATERIAL INTO THE UPPER WASH PLANTS SURGE PILE. AT 21:20 I.NAME NOTICED THAT THERE WAS NO FEED. HE INVESTIGATED AND FOUND HIM ENTRAPPED IN FEEDER.
Reportable incidents
32 on file (excluding fatalities above)2023 · 2 incidents
Haul truck driver closed the truck door on their own finger.
100 ton haul truck was preparing to dump when the ground gave way causing the truck to flip over backwards.
2020 · 2 incidents
While driving the front end loader toward a stock pile of material the left front tire ran over a large rock jolting the operator in the cab.
Just as the sun came up truck driver noticed a motionless body lying on the ground at the base of the reclaim pit north high wall. Driver called another employee and they inspected the deceased body, determined the person was not an employee. 2nd employee drove out of the pit to a location where they could get a signal and called me. I immediately called 911 and the MSHA hotline.
2016 · 2 incidents
While using a com-a-long to lift a screen deck the handle broke on the com-a-long causing the employee to fall backwards and in doing so EE's left are flailed to catch self and EE hit EE's arm/wrist on the cat walk railing displacing the distal radius.
The miner was using a hand grinder with right hand to smooth out an area on a piece of metal when the grinder at some point grabbed the metal and jumped to the left nicking the middle finger of the left hand of the miner which was bracing the metal.
2015 · 1 incident
Employee was pounding on a ripper tooth with a hammer trying to dislodge it from the ripper on a D11 dozer when a small piece of metal broke off the tooth and hit the employee in the lower leg. Mechanic was driven to the emergency room where it was determined to leave the metal in the leg and apply 2 stitches. The mechanic returned to full duty the next day.
2011 · 1 incident
Miner was checking a head pulley bearing on a stacker belt against his outlined duties and without prior instruction when he got his had caught between the pulley and the wiper causing a severe crushing injury to his right hand.
2003 · 2 incidents
WHILE CUTTING 1" PLATE DEBRIS CAME UP UNDER SAFETY GLASSES, EMBEDDING IN RIGHT EYE.
WALKING DOWN A SET OF STAIRS EE SLIPPED, LANDING ON HIS BUTT AND LOWER BACK.
2002 · 1 incident
SLIPPED OFF STEP GETTING INTO THE WATER TRUCK. HE FELL TO THE GROUND, BREAKING HIS WRIST.
2001 · 2 incidents
EE TWISTED HER LEFT ANKLE WALKING DOWN STAIR AT THE WASHPLANT. EE RET'D TO WORK BUT AFTER 2 DAYS, SHE STILL FELT PAIN IN ANKLE. SHE RET'D TO DR 7/20/01 ON 7/20/01 DR ADVISED EE SHE COULD RETURN TO WORK AS LONG AS SHE LIMITED HER WALKING
EE HAD SMALL ROCKS AND DUST BLOWN INTO HIS EYES WHILE EXITING A PIECE OF EQUIPMENT.
1999 · 1 incident
A TRUCK WAS BEING OFF LOADED BY A FORKLIFT. THE LEFT FORK GOT HUNG ON A PIECE OF METAL ON THE TRAILER. THE FORK BROKE FREE AND STRUCK THE EMPLOYEE JUST ABOVE THE CHIN, CUTTING A GASH IN IT. EM PLOYEE WAS TREATED AND RELEASED. WILL HOLD A SAFETY COMMITTEE MEETING WHEN EMPLOYEE RETURNS TO WORK.
1997 · 1 incident
HE WAS CLEANING BELT FILTER AND SLIPED.
1996 · 5 incidents
SLIPPED AND LANDED ON 4X12 WITH LEFT LEG BREAKING TIBIA.
SLIPPED WHILE CLEANING SCREEN AND EITHER TWISTED OR HIT KNEE ON PIECE OF STEEL.
THE EMPLOYEE WAS STANDING IN A 966-F LOADER BUCKET IN ORDER TO REACH THE FLASHING OF THE SCREEN FEED BELT AT THE CRUSHER. THE LOADER'S PARKING BRAKE WAS APPLIED AND WAS STABLE FOR APPROX. 20 M INS. FOR AN UNKNOWN REASON, THE LOADER STARTED MOVING AHEAD, PINCHING THE OPERATOR BETWEEN THE BUCKET AND THE CONVEYOR BELT. INJURIES TO THE EMPLOYEE WERE IN THE UPPER BODY.
AN EE BUMPED A STEEL PLATE THAT WAS IN A MATERIAL CHUTE & STRUCK THIS EE IN THE HEAD. THERE WAS A CUT THAT REQUIRED NINE STITCHES.
LOADER OPERATOR, EE WENT OUTSIDE TO WASH WINDOW S WHEN A GUST OF WIND MADE HIM LOOSE HIS BALANCE AND FELL OFF LOADER. ALL HANDRAILS WERE IN PLACE. CRACKED RIBS AND SORENESS IS ALL THAT IS KNO WN TO BE WRONG AT TIME OF WRITING.
1995 · 2 incidents
A SEVICE TRUCK WAS STUCK AT THE TAIL PULLEYS OF THE FEEDBELTS OF THE UPPER WET PLANT. A FRONT END LOADER WENT TO PULL OUT THE SERVICE TRUCK. WHEN THE BRAKES FAILED TO COMPLETELY STOP THE LOADE R BEFORE HITTING THE SERVICE TRUCK. THE MAINTENANCE OPERATOR WAS GETTING A CHAIN OUT OF THE BED OF THE SERVICE TRUCK, WHEN THE IMPACT OF THE LOADER HITTING THE TRUCK MADE THE OPERATOR FALL IN
A ROCK WAS STUCK IN THE JAW CRUSHER. PLANT FOREMAN SHUT DOWN CRUSHER. THE PLANT OPERATOR TRIED TO PRY OUT THE ROCK, WHEN ANOTHER ROCK BECAME DISLODGED AND FRACTURED HIS LEFT FOOT.
1994 · 1 incident
A TEST WAS BEING MADE OF VOLTAGE DROP ACROSS ELECTRICAL CIRCUIT. THE TEST LEADS SHORTED A WIRE ACROSS TOO ELECTRICAL TERMINALS CAUSING A DEAD SHORT.
1992 · 2 incidents
THE EMPLOYEE WAS CLEANING THE FRAME WORK OF A CONVEYOR BELT WHEN A PORTION OF HIS ARM WAS ROLLED THROUGH THE TROUGHING ROLLER AND THE BELT. THIS ACCIDENT RESULTED IN A BRUISED LEFT FOREARM.
OPERATOR WAS CUTTING OFF HITCH OF TRAILER WHEN A HOT EMBER ENTERED EAR. HAD EAR PLUGS IN POCKET.EMBER BURNED THE INSIDE OF EAR.
1991 · 2 incidents
EMPLOYEE WENT TO ADJUST POLYMER MIXER ON CLARIFIER ON THE WAY DOWN THE STEPS EMPLOYEE SLIPPED ON STEPS & FELL EMPLOYEE INJURED HIS LEG & WENT TO THE DOC TO HAVE IT CHECKED
THOUGHT MATERIAL BUILDUP WAS CAUSING CONVEYOR NOT TO MOVE FREELY. WENT TO CLEAN AREA BEHIND CONVEYOR AND HIT CORNER OF CONVEYOR WITH RIGHT ANKLE.
1990 · 5 incidents
EMPLOYEE WAS STANDING ON FRAMEWORK OF A RUNNING CONVEYOR BELT WHICH IS AN UNAUTHORIZEWD RESTRICTED AREA HE WAS ATTEMPTING APPARENT LY TO CLEAN PULLEY THERE WAS FROM REPORT TRAUMA TO THE RT ARM WHICH RESULTED IN SURGICAL PROCEDURES
SHOVELING GRAVEL OFF CONVEYOR BELT RAILS AND UNDER ROLLERS. LOST BALANCE AND FELL OFF THE SIDE OF BELT TO THE GROUND ON LEFT SIDE AND BACK.
CLIMBING OFF THE LOADER MISSED THE STEP & FELL ON TAIL BONE
STEPPED FROM FENDER OF LOADER, HIT HEAD ON MIRROR BRACKET.
REMOVING OXYGEN TANKS FROM TRAILER,DROPPED OXYGEN CART ON RIGHT HAND.BROKE RIGHT 3RD FINGER.
The full compliance file on Lone Mountain Pit
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.