Mining Incidents

Black Thunder Coal

Wright, Campbell County, WY  ·  Active
MSHA Mine ID: 4800977

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Fatalities
1
Total incidents
200
Years on record
2014–2026
Latest incident
Apr 2026
Compliance record
MSHA citations since 2000
1,615
citations
354
significant & substantial
$1,298,873
proposed penalties
$1,184,888
paid to date
Source: MSHA violations data, updated weekly.
Quarterly safety rates
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2025 Q4 436,004 52 5 119.3
2025 Q2 403,505 14 4 34.7
2025 Q1 9,228 36 8 3901.2
2024 Q4 10,488 6 3 572.1
2024 Q3 443,905 0 0 0.0
2024 Q2 6,552 27 2 4120.9
2024 Q1 11,802 24 8 2033.6
2023 Q4 12,064 42 4 3481.4
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.

Fatalities at this mine

1 recorded
July 21, 2021 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech Fatality · MACHINERY
Thunder Basin Coal Company LLC · Struck by falling object

A Millwright drove the pins out of a 200-ton crane boom to change out a section and the boom fell on employee.

Reportable incidents

199 on file (excluding fatalities above)

2026 · 6 incidents

April 19, 2026 WY · Coal plumber, pipefitter, millwright POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

A millwright was moving parts with a knuckle boom when the controller was bumped resulting in an injury to the finger that required stitches.

March 20, 2026 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A grass fire started at the rail road tracks and spread to the mine property. The fire could not be put out within 30 minutes

January 22, 2026 WY · Coal blaster, shooter, shotfirer, explosive worker, powder gang/monkey SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from ladders

The employee was dismounting the drill from the offside ladder. When on the last rung of the ladder, EE's foot slipped off and when EE landed on the uneven ground EE felt a pop in EE's ankle.

January 19, 2026 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A coal fire was located in the 5 west pit that could not be extinguished within 30 minutes

January 9, 2026 WY · Coal greaser, grease man, oiler, lube man, dragline oiler SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall onto or against objects

Employee tripped in the revolving frame of a dragline catching their fall with their right arm. Employee was diagnosed with a torn bicep tendon on 1/16/2026 and had a procedure on 1/22/2026 to repair the bicep tendon

2025 · 12 incidents

December 23, 2025 WY · Coal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

while moving a part in the warehouse the employee lost their grip causing the part to move suddenly pinching finger and causing a laceration that required 6 stitches.

December 18, 2025 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

Employee was trimming a piece of plastic when knife slipped resulting in a laceration to left index finger requiring five stitches.

November 13, 2025 WY · Coal motorman, motor person, swamper, switchman, locomotive operator SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

Dark out with dry/calm weather conditions. Uneven walking surface with loose ballast and exposed rail ties.

November 5, 2025 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A coal fire was discovered in the 6 west spoils that could not be extinguished within 30 minutes

October 23, 2025 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A coal fire was discovered in the 5 west pit that could not be extinguished within 30 minutes

September 20, 2025 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A coal fire was discovered in the south pit that could not be extinguished within 30 minutes.

September 1, 2025 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A coal fire was discovered in the South Pit that could not be extinguished within 30 minutes

July 29, 2025 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck against stationary object

Employee slid out of seat on bus ride out to EE's equipment. When EE slid out of EE's seat EE hit EE's left side (ribs) on a lunchbox. Positive X-ray showed fractured ribs. Was released to work and returned EE's next scheduled shift.

June 11, 2025 WY · Coal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

A driver was stepping off truck step onto the lowboy when EE misplaced EE's footing, causing a small fall to the ground. Employee landed on EE's shoulders and struck back EE's head on the ground causing a small laceration on the back of the head, requiring one staple to repair laceration.

June 6, 2025 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Struck by flying object

While securing a load to the bed of a service truck with a ratchet strap the anchor point failed. the buckle from the strap struck the employee in the mouth damaging three teeth.

January 23, 2025 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in lifting objects

Employee needed to get a strap under a RAX link pin, so they could lift it up into place. They tried to lift one end of the pin to slide the strap under it. When employee lifted on the pin employee tore bicep and tendon.

2024 · 19 incidents

December 29, 2024 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

bottom of a coal pit, discovered a small coal fire burning at toe of coal wall.

December 20, 2024 WY · Coal motorman, motor person, swamper, switchman, locomotive operator OTHER
Thunder Basin Coal Company LLC · Bodily reaction, (Not Elsewhere Classified)

Team member was making a squatting motion on level dry ground when what EE claimed to be EE's knee gave out and EE fell down to the ground. Outside conditions at the time were clear and sunny.

November 19, 2024 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

Snow and ice on haul road caused i.e. to slip and break their left ankle.

September 28, 2024 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in lifting objects

A Mechanic removed a fender from a bulk truck and with help lifted and placed the fender on the ground. After setting fender down mechanic felt pain in EE's back and sat down in hopes the pain would pass. Employee was transported to hospital and diagnosed with lumbar spasms and required to miss one day of work to rest.

September 11, 2024 WY · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Thunder Basin Coal Company LLC · Inhalation of radiations, caustics, toxic and noxious substances

Employee came into office 9/11/2024 claiming smoke inhalation from torching on material on mine site. Unknown time of return.

August 17, 2024 WY · Coal blaster, shooter, shotfirer, explosive worker, powder gang/monkey HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in lifting objects

Employee was operating a skid steer stemming holes on pattern. Once finished, the employee parked skid steer and went the lift the lap bar and exit skid steer. Employee received 1st Aid for pain in the right shoulder and returned to work. On 10/15/2024 , employees rotator cuff was repaired and was placed on leave by the medical provider.

August 4, 2024 WY · Coal utility man, shift tech, service/dump truck operator HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

An employee was making adjustments to a shovel bucket, when the stand kicked out from under the latch bar and it pinched the web of the employee's thumb, causing a laceration that required stitches.

July 16, 2024 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck against a moving object

An employee reported that EE's back was sore from a shovel dropping a bucket of material in EE's haul truck. EE continued working for two days and then went on days off. EE did not report to work on 7/26/2024 and began missing time.

July 14, 2024 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A grass fire started under the powerlines and burned for over 30 minutes. Five dead black birds were found at the ignition point, indicating they had caused a phase-to-phase arc flash.

June 16, 2024 WY · Coal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck against a moving object

An employee with a history of back injuries began experiencing increased pain and was taken in for evaluation on 06/16/2024. An MRI was schedule with a follow up appointment on 06/20/2024. A previously bulged disc and arthritis were diagnosed, and physical therapy was recommended to relieve nerve impingement, and EE began missing time.

June 11, 2024 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

Employee was getting a chain into position around body retaining pin to aid in pulling a lower strut pin. While holding the body retaining pin up placing chain into position, the pin slipped out of their hand. When pin fell it pinched their middle and ring finger of left hand between body retaining pin and differential housing.

June 4, 2024 WY · Coal beltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor rider HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

Employee was prepping a splice for vulcanization when the olfa knife employee was using slipped and contacted employee's arm. Employee was transported to the hospital and received stitches resulting in a recordable incident. Employee was released back to work full duty.

May 31, 2024 WY · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

A wash bay attendant got into the cab of a grader and the door closed on EE's finger.

March 28, 2024 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A powerline air switch arced and caused sparks that ignited a grass fire that burned for over 30 minutes.

March 24, 2024 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

An employee slipped and injured EE's knee getting off a pit bus. EE continued working until 03/27/2024, at which time EE missed work to go have knee surgery.

March 21, 2024 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

Subject exited axle box on unit 192, the hand grab bar welds broke and employee fell to the ground, approximately 4 feet, landing on back.

February 15, 2024 WY · Coal IGNITION OR EXPLOSION OF GAS OR DUST
Thunder Basin Coal Company LLC · Accident type, without injuries

A millwright was thawing out an airhorn on an electric shovel with a small butane torch, when methanol sprayed out of a connection and was ignited by the torch. The flash caused burns to the employee's lower face and neck areas which were treated with First Aid.

January 12, 2024 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer DUST DISEASE OF LUNGS
Thunder Basin Coal Company LLC · Inhalation of radiations, caustics, toxic and noxious substances

A Part 90 Miner applied for short-term disability on 01/11/2024 and did not come to work on the next schedule shift, which was 01/12/2024.

2023 · 17 incidents

December 27, 2023 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

A haul truck operator drove into the back of a haul truck that had stopped, crushing the cab and pinning EE under the steering column for about 1 hour. EE had nerve damage to EE's legs.

December 19, 2023 WY · Coal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver OTHER
Thunder Basin Coal Company LLC · Unclassified, insufficient data

A haul truck was driving erratically up a ramp. It stopped near the top, rolled back down into the left repose and tipped onto its side. The operator was found unresponsive, removed from the truck, and airlifted to a Medical Center. Driver died the following day from an apparent medical condition, as no injuries were found.

December 16, 2023 WY · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall down stairs

A wash bay technician was on a portable stairway, trying to remove a mud clod from the ripper frame of a track dozer. EE's hands slipped off and EE fell back on the concrete floor, fracturing two ribs.

December 4, 2023 WY · Coal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in lifting objects

Employee lifted a riffle drawer with coal and pulled something in their lower back.

October 20, 2023 WY · Coal greaser, grease man, oiler, lube man, dragline oiler SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from ladders

A maintenance employee stepped from an IT loader to the third step of a 6' step ladder and fell to the concrete floor, bruising their hip. Employee was released by the doctor but did not report to work on 10/23/2023.

September 23, 2023 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

An area was seen smoldering at the top of an 85-foot coal wall. Dozers were used to push an access ramp in, so a water truck with surfactant could be applied to the area and extinguish it. The area burned for over 30 minutes.

September 8, 2023 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

A mechanic smashed their little finger between a track dozer and a jack handle.

August 29, 2023 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoldering coal was found in five different areas of the coal mine. The apparent cause was spontaneous combustion from the recent rain, followed by hot dry weather. The areas were difficult to access, so they burned for over 30 minutes.

August 19, 2023 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

An area was seen smoldering at the top of an 85-foot coal wall. An elevated dirt ramp had to be constructed to get a water truck high enough to extinguish and seal the area, so it burned for over 30 minutes.

August 18, 2023 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A series of three grass fires started along the railroad tracks west of the mine property and burned onto the mine. It took firefighting personnel over 30 minutes to extinguish the flames.

July 14, 2023 WY · Coal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck against a moving object

The front suspension bolts sheared off and caused the front of a haul truck to hit the ground. The operator was bruised by the seatbelt.

July 6, 2023 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoldering coal was found in an area of the pit that was difficult to access. It was over 30 minutes before a loader could reach the area and dig it out.

April 20, 2023 WY · Coal welder (non-shop) OTHER
Thunder Basin Coal Company LLC · Struck by flying object

The technician was working outside when dust/dirt blew into their left eye. After removing the dirt particle, the Doctor prescribed an antibiotic for the tech's eye.

April 17, 2023 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A grass fire started along the railroad tracks, west of the mine pit. Firefighting personnel contained the fire within the 30-minute time frame, but total extinguishment took over 30 minutes.

April 13, 2023 WY · Coal crane operator, mobile equipment operator (meo), dragline operator, dropball operator, rigger DISORDERS (REPEATED TRAUMA)
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

A dragline operator elected to go get carpal tunnel surgery on this date for an illness that has occurred over many years.

February 24, 2023 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall onto or against objects

An employee slipped from the deck of a track dozer and fell between the track and the push-arm, sustaining fractures to their ribs.

2022 · 15 incidents

October 20, 2022 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

An employee was lowering a folding handrail and caught EE's ring finger in a pinch-point, resulting in an avulsion of the tip.

August 5, 2022 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A coal wall fire started from spontaneous combustion, in an inactive area of the mine property. It burned for over 30 minutes, due to difficult access.

August 4, 2022 WY · Coal electrician, lineman STEPPING OR KNEELING ON OBJECT
Thunder Basin Coal Company LLC · Struck against stationary object

An electrician was kneeling and when EE stood up EE felt knee pain. EE was assessed by doctors and released back to work. An MRI and follow up appointment were scheduled. EE was later diagnosed with a torn meniscus and began missing time on 08/11/2022.

July 24, 2022 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

A mechanic felt a pop in the knee stepping from a platform to a bull dozer. EE was diagnosed with some small meniscus tears and released back to work. EE continued to experience pain and was later scheduled for surgery. EE began missing time on 08/23/2022.

June 16, 2022 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

Injured Employee was torqueing a CAT 795 haul truck with a RAD 34 torque gun. Injured employee received a dislocation, laceration and break to EE's right thumb when it became caught between the extension of the RAD 34 and wheel motor.

June 16, 2022 WY · Coal crane operator, mobile equipment operator (meo), dragline operator, dropball operator, rigger DISORDERS (REPEATED TRAUMA)
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

An employee with a history of shoulder injuries began experiencing increased pain after helping pry on a dragline pin with a bar. EE continued to work and had it evaluated by a specialist on 09/19/2022, finding multiple injuries from various incidents. EE elected to have surgery on 11/17/2022 and began missing time.

June 14, 2022 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck against a moving object

The employee reported back pain and was checked and release by a doctor at a clinic. The employee continued working, but was unable to report to work on July 1 due to back pain that increased during scheduled days off. An MRI was taken and a doctor diagnosed a chronic back condition, not related to any specific incident.

June 3, 2022 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck against a moving object

A haul truck operator backed through a berm and tipped the truck over, resulting in a back injury.

April 26, 2022 WY · Coal motorman, motor person, swamper, switchman, locomotive operator OTHER
Thunder Basin Coal Company LLC · (Not Elsewhere Classified)

Team member suffered heart attack as they were coming in to work, Team member had not yet started their shift and was walking to the office when they collapsed.

April 2, 2022 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

In the process of moving the Rad 15 impact gun from one nut to the other, the injured employee received a fracture and laceration to EE's left ring finger when EE's finger became lodged between the Rad 15 impact gun and the wheel.

March 5, 2022 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

The employee felt a pop in the knee while getting into a pickup truck. EE continued to work until was diagnosed with a ruptured ACL on 3/11/22 and began losing time.

2021 · 14 incidents

December 23, 2021 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck by flying object

Employee made a right turn off the haul road to enter the site. Upon entering the site, the employee turned sharply to the right. The truck was unable to complete the turn and overturned onto the driver's side. Employee received a cut to the top of right hand requiring stitches and extensor tendon repair of right index finger.

November 24, 2021 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A section of coal wall was found burning in an area of the pit that was not being mined. The fire started from spontaneous combustion and was spread by wind conditions. The fire could not be extinguished in 30 minutes due to the need to move equipment into the area to create access and attack the fire.

November 8, 2021 WY · Coal welder (non-shop) MACHINERY
Thunder Basin Coal Company LLC · Flash burns (welding)

A technician was welding in close proximity to other welders inside a rev. frame. The light reflected off the walls behind and came in behind EE's welding hood causing EE to receive flash burn to EE's eyes. EE was given a prescription of eye drops.

October 23, 2021 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Fall from machine

Employee was preparing to drain oil from swing case of machine. Employee fell approximately 7 feet to ground sustaining multiple injuries.

September 20, 2021 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

Tech was moving a heavy turbo from part cart to the back of the service truck bumper. The right pinky finger was smashed in between the turbo and the bumper. Tech has a fractured pinky.

July 6, 2021 WY · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

The employee was using a handheld grinder with a cutting wheel to cut off a section of handrail, when the tool kicked back, striking EE in the lower leg, which resulted in a laceration that required stitches.

June 15, 2021 WY · Coal ELECTRICAL
Thunder Basin Coal Company LLC · Accident type, without injuries

A coal shovel caught fire following an electrical fault. The fire originated in the reactor cabinet area and burned for over the 30-minute time frame.

May 29, 2021 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A fire started on the upper area of a coal highwall from spontaneous combustion. The open pit was not being mined and it took over 30 minutes to build access to the area and extinguish the fire.

April 23, 2021 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

The employee was placing a large wood block onto the fender of a forklift, when the block bounce up and pinch EE's two finger tips between the block and the forklift fender. This resulted in a tuft fracture and lacerations that required stitches.

March 25, 2021 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer OTHER
Thunder Basin Coal Company LLC · Bodily reaction, (Not Elsewhere Classified)

The employee says: felt knee pop while walking around haul truck. The employee continued to work and did not want medical care until 05/03/2021. Employee was then evaluated and scheduled for arthroscopic surgery. Employee had surgery on 07/06/2021 and became reportable and began missing work shifts on 07/09/2021.

March 20, 2021 WY · Coal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator POWERED HAULAGE
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

While using a hoist and a forklift to position a piece of machinery, the employee got EE's finger pinched between a fork and the load.

March 6, 2021 WY · Coal electrician, lineman POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck against a moving object

An electrician was driving a pickup and dropped a handheld radio. While picking it up they ran up on a berm and rolled the pickup over. Employee was released back to work by the doctor, but an X-ray showed cracked ribs.

January 5, 2021 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

Tech pinched finger between action arm and rim while removing wheel stud bolts with a rad gun on a rear inside dual of a haul truck. Injury resulted in a laceration on Techs left middle finger requiring 10 stitches.

2020 · 7 incidents

November 28, 2020 WY · Coal quality control technician, laboratory technician, laboratory assistant SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall down stairs

Employee reports EE was carrying a sample of approximately 50lbs down the stairs. EE's foot missed a step and EE fell forward.

October 10, 2020 WY · Coal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in lifting objects

Employee reports they were dumping approximately 30 lbs of coal on a pile with a twisting motion. Employee then felt pain. Employee informed management on 10-16-2020. Letter attached to original form for further information.

July 11, 2020 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 5 1/2 West coal pit at the top of the coal face. The smoke could not be extinguished in 30 minutes. No miners or mining equipment were at risk during this event.

March 18, 2020 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Thunder Basin Coal Company LLC · Struck by flying object

Socket detached from air wrench and struck i.e. on RT cheek causing a laceration.

February 20, 2020 WY · Coal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

The equipment operator tore the quadriceps muscle and patellar tendon on EE's right knee when EE missed a ladder rung dismounting the equipment. Surgery was required to repair the torn tissues.

January 22, 2020 WY · Coal master mechanic, foreman, supervisor HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Struck against stationary object

IE was tapping on a rear strut with a hammer when EE's hand contacted a pulling rod that was in the strut pin causing a laceration to EE's left middle finger that required 5 sutures to close.

January 5, 2020 WY · Coal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver OTHER
Thunder Basin Coal Company LLC · (Not Elsewhere Classified)

The delivery driver was found unresponsive laying on the ground near the cab of the truck. CPR and an AED were administered by mine rescue personnel. The victim was immediately transported by ambulance and turned over to local EMS crew. This is a non-chargeable medical event.

2019 · 14 incidents

December 28, 2019 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in pulling or pushing objects

An equipment operator experienced a non-displaced fracture to a bone in the right shoulder when pulling on the cab door of the electric shovel.

October 4, 2019 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by falling object

A Technician was in the process of replacing a rear strut on a 798 haul truck. As they removed the lower rear strut pin, the lower section of strut fell. This was caused by an unknown internal failure which allowed the lower section of strut to fall hitting the Technician in the leg.

September 26, 2019 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the spoils between 4N & 5N. Waste coal had spontaneously caught fire and caught tumble weeds on fire as well. The fire was not extinguished in 30 minutes.

September 20, 2019 WY · Coal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver OTHER
Thunder Basin Coal Company LLC · (Not Elsewhere Classified)

A haul truck operator began feeling ill with chest pains and shortness of breath. EE was transported to a local hospital where diagnosed with having had a mild heart attack and a blood clot. Reporting Non Chargeable.

July 24, 2019 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 6W coal pit at the top edge of the coal face. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

June 24, 2019 WY · Coal crane operator, mobile equipment operator (meo), dragline operator, dropball operator, rigger HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

A Technician was using a bar to hold the bolt into place so they could attach the nut to the end of a bolt. While screwing the nut to the bolt, the bar slipped. This caused the bolt and attached nut to drop, pinching the Technicians left 5th finger in between the drag case and the nut. This split the Technicians skin on their finger requiring 4 stitches.

June 7, 2019 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Thunder Basin Coal Company LLC · Struck by falling object

A millwright was using a carbon arc gouging tool to begin to remove a brass bushing when the bushing came loose and fell on the millwright's foot, fracturing the foot.

May 22, 2019 WY · Coal electrician, lineman OTHER
Thunder Basin Coal Company LLC · (Not Elsewhere Classified)

The electrician had been troubleshooting a misalignment switch at the bottom of the conveyor. When walking up the incline to exit the area they began experiencing chest pains. Electrician was transported to the ER where they were diagnosed with having had a mild heart attack.

May 14, 2019 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

The technician was dismounting a forklift when EE missed the bottom step and fell, landing on EE's left hand and wrist. The result was a fractured wrist.

April 29, 2019 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 5 1/2 W coal pit at the top edge of the coal face. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

April 9, 2019 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 5W coal pit at the top edge of the coal face. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

March 2, 2019 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

The employee was walking from the parking lot to the changehouse prior to the start of shift when the employee fell, fracturing left femur.

March 2, 2019 WY · Coal electrician, lineman SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

The electrician was beginning to board the shovel when ee slipped, landing on back on a chunk of coal. The result was a fractured rib and non-treatable transverse process fractures.

February 25, 2019 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 6W coal pit at the top edge of the coal face. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

2018 · 13 incidents

December 20, 2018 WY · Coal ENTRAPMENT
Thunder Basin Coal Company LLC · Accident type, without injuries

At 4:35AM the plant technician was going to the top of the silo in the elevator when the elevator stopped near the top of the silo. The elevator passenger was never in any danger of being injured. This person was safely out of the elevator at 7:05AM.

November 29, 2018 WY · Coal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

An employee was attempting to disconnect a 4 inch hose secured by camlock fittings. The employee opened the ears and was attempting to disconnect it by holding onto the hose with both hands and wiggling it off. Once the hose came free, the end of the hose hit the employee in the mouth, breaking a tooth.

November 18, 2018 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

At the beginning of shift, the equipment operator fell while walking to the pit bus resulting in a fractured left elbow.

September 26, 2018 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 1N coal pit at the coal face. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

September 26, 2018 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 6W coal pit at the top edge of the coal face. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

July 21, 2018 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 5W coal pit on the coal face. The smoldering coal was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

June 25, 2018 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

The blade operator was climbing the boarding ladder to the cab when ee lost grip on the right inside cab handrail causing ee to fall to the ground. The fall resulted in a right elbow dislocation fracture and a right pelvis fracture.

June 10, 2018 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

A mechanic caged and removed a brake can that needed replaced from a truck. The mechanic had the old brake can on the shop floor and was in the process of removing the cage bolt. The mechanic attempted to relieve some of the air pressure, however the air pressure released quicker than expected, resulting in the cage bolt/nut pinching the mechanics finger. 6 stitches req'd.

June 10, 2018 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Thunder Basin Coal Company LLC · Bodily reaction, (Not Elsewhere Classified)

Descending from haul truck caught foot on water pump fitting while twisting body. Felt pain in left knee. Employee continue to work until recent surgery resulting in injury becoming recordable.

May 15, 2018 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 6W coal pit at the top edge of the coal face. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

March 21, 2018 WY · Coal welder (non-shop) HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in pulling or pushing objects

Injured employee was dragging welding leads behind them when they became lodged under a stationary tire. This jerked employee's arm and injured the shoulder.

March 16, 2018 WY · Coal motorman, motor person, swamper, switchman, locomotive operator HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

On 3/16 at 1530 employee secured train returned to cab, felt pain in back, at the time employee refused all medical treatment. The Next day, went to the clinic. Was released back to work with no restrictions and no loss of time. On 3/19, employee went back for a follow up appt. Did receive additional medical treatment. At that point made it reportable.

February 14, 2018 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

The injured employee was sprayed by pressurized hydraulic oil during the removal of a sensor. The release of the pressure caused EE to move rapidly and had struck the ground. Injuries were sustained to face and hand.

2017 · 19 incidents

December 29, 2017 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 5W coal pit on the highwall. The smoke was not able to be extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

December 28, 2017 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

IE twisted Left Knee, complained of pain. On 1/11/2018, IE was diagnosed with torn ACL, which will require surgery.

November 20, 2017 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered on the west high wall in the 5 1/2 West entry. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

November 10, 2017 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered on the west high wall in the 6 West entry. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

October 3, 2017 WY · Coal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in lifting objects

employee was removing sample from sampling system. As employee pulled the sample out, it was too heavy for employee and employee strained lower back

September 29, 2017 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

The mechanic was guiding the left front spindle assembly into position on a motor grader when the assembly suddenly slipped into place pinching the mechanic's gloved left ring finger between the spindle and the frame. This resulted in a laceration requiring stitches.

August 22, 2017 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered on the 4W end wall, in the upper coal seam. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

August 18, 2017 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

Smoke was discovered in the 4W coal fender near the bottom of the ramp. The smoke was not extinguished in 30 minutes. No miners or mine equipment were at risk during this event.

July 19, 2017 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Over-exertion in pulling or pushing objects

Removing fittings with a crescent wrench. While pulling on the wrench the employee felt a pop in left elbow. Initial diagnosis is muscle strain.

July 15, 2017 WY · Coal coal/ore shovel operator, shoveler, power shoveler HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by falling object

The equipment operator was assisting electricians remove a cover from on top the RPC cabinet when the cover fell to the floor, bouncing and hitting the operator. This resulted in a laceration to the inside of the right calf muscle requiring stitches.

July 10, 2017 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

The employee walked near an open blast hole when the collar of the hole caved, resulting in the employee's foot and leg falling into the hole. The employee grabbed the discharge auger of the truck, which was positioned to load the hole. The employee received 1st Aid for a shoulder strain and returned to work. On 8/7/2017, the employee was placed on leave by the medical provider.

June 2, 2017 WY · Coal welder (shop) SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

The IE tripped on a forklift pocket of a stand. When EE fell EE landed on left knee. Other than a little pain and some initial swelling the employee was feeling fine and able to walk and move the knee as normal. About 3 weeks later the knee had some fluid build up in a bursas sack and the employee had it drained. It became reportable when EE had the knee drained on 6/26/17.

May 30, 2017 WY · Coal motorman, motor person, swamper, switchman, locomotive operator HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

Team member was climbing the ladder on the locomotive. Team member reported that EE heard popping noise in the right wrist. Poor body mechanics.

May 30, 2017 WY · Coal outside foreman, leadman HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

Employee was assisting another employee with the dovetail of a trailer to add an extension to lengthen the trailer when the incident occurred. There is a handle on the dovetail but it was stuck so employees put hands underneath to pull up on it and the stand that is underneath came swinging back pinching employee's left middle finger. This resulted in a nine stitch repair.

May 29, 2017 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

An equipment operator slipped on the dozer tracks while pulling on a pry-bar causing the bar to hit EE in the mouth, chipping EE's upper left front tooth.

April 24, 2017 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

The IE was working in an engine compartment of a 795 haul truck when ee lost balance. When ee grabbed the deck of the truck to catch balance the twisting motion on shoulder caused it to pop.

February 12, 2017 WY · Coal quality control technician, laboratory technician, laboratory assistant SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

Employee walked out of bldg. with sample and slid on rock salt on the cement, falling on both knees. EE continued to work until 2/21/2017 when Dr. restricted EE to no work.

February 1, 2017 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Absorption of radiations, caustics, toxic and noxious substances

Crew was dipping center pin of shovel in liquid nitrogen when it started to bubble out of the tank coming into contact with employee's left hand.

January 28, 2017 WY · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

Two millwrights were removing a dragline swing pinion retainer plate when the plate slipped from their grip, resulting in a crushing/fracture of the left little finger for one of the technicians.

2016 · 14 incidents

December 20, 2016 WY · Coal quality control technician, laboratory technician, laboratory assistant SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

Employee was spraying off front entrance to the prep bldg with air hose. Employee turned around to go inside and tripped over a 4/4 block of wood that was on the ground holding the door open. Employee returned to work with regular duty and then missed work beginning 12/30/16.

December 11, 2016 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Over-exertion in wielding or throwing objects

Employee was swinging a sledge hammer against the outside of a bulk storage bin to dislodge the material inside. The end of the hammer became entangled in a stainless steel lifeline cable, causing a strain to the employee's shoulder. The employee received first aid treatment initially, but was later placed on restricted duty by the medical provider on January 13, 2017.

December 1, 2016 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck by flying object

A mechanic was beginning to lift a gear case off the floor with a crane when one of the slings caught on a bolt. This caused the case to tip over, whipping a drain hose on the case towards the mechanic, fracturing left wrist.

October 13, 2016 WY · Coal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

A small blower was bolted onto a pallet. When the pallet was loaded onto the flatbed truck it had to be turned 90 degrees to allow for proper securement to the flatbed. The employee was in the act of turning the pallet back 90 degrees when the board EE was pulling came loose and the employee fell off the truck bed to the ground.

October 11, 2016 WY · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

Was changing a bearing and got a piece of metal stuck in hand. Had it removed and required 3 stitches.

September 16, 2016 WY · Coal drill operator SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

While walking across the drill pattern, the drill operator tripped on uneven terrain, twisting knee. On 10/27/2016 the employee underwent a medical procedure that makes this incident reportable.

August 1, 2016 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Thunder Basin Coal Company LLC · Bodily reaction, (Not Elsewhere Classified)

A millwright stepped up on a tub cable hook to connect the ground lead from welding machine to the revolving frame of the dragline. When EE stepped up EE felt pain in right knee. On August 18, 2016 EE had a medical procedure to knee that makes this incident reportable.

July 26, 2016 WY · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Over-exertion in wielding or throwing objects

Changing ties at the mine - setting spikes and a shard split off and hit arm of employee, small particle removed, no lost time went back to work put wrap on arm.

June 15, 2016 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

Employee was removing a swing motor from a PC2000 Komatsu Excavator, when the fitting became loose employee's hand slipped down the wrench crushing it between the wrench and a hardline hose.

April 22, 2016 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by falling object

Employee was struck in arm by boom after cylinder failure caused boom to drop to bed. Employee was bruised and received 2 stitches.

March 23, 2016 WY · Coal assayer, geologist, metallurgist, engineer, engineer management STRIKING OR BUMPING
Thunder Basin Coal Company LLC · Struck against stationary object

The employee's hard hat made contact with the uncut portion of a protruding zip tie. The end of the zip tie was deflected by the hat, and then whipped back when released. The end of the Zip tie went around the top of the employee's safety glasses and made contact with the eye, causing a minor corneal abrasion.

January 24, 2016 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Thunder Basin Coal Company LLC · Struck against a moving object

The pickup truck's RR tire blew while driving south on the haul road causing the truck to slide into the ditch. The abrupt stop caused the driver's back to be jarred resulting in a thoracic vertebrae compression fracture.

2015 · 29 incidents

December 5, 2015 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

While trying to loosen a nut on a steering wheel of a 793 haul truck, the employee was pulling the wrench towards himself the wrench slipped and struck the employee in the mouth causing a chipped tooth.

December 3, 2015 WY · Coal outside foreman, leadman HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in lifting objects

While lifting/pulling a conveyor belt wiper, the employee's shoulder was dislocated. The employee underwent 2 medical procedures to have the shoulder put back in position.

October 29, 2015 WY · Coal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in lifting objects

employee lifted a sample bag to put it in the back of the truck and felt shoulder pop. NO scheduled work shifts missed. 11/23/2015 EE went to the Chiropractor for evaluation, and was assigned to light duty. 02/29/2016 Doctor return to work statement- do not lift over 25 lbs. 03/14/2016 Doctor's evaluation - return to regular duty

October 15, 2015 WY · Coal utility man, shift tech, service/dump truck operator HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between two or more moving objects

The rescue team was conducting plant fire system familiarization training when a technician's hand was pinched/smashed between the upper and lower sections of the elevator door while pulling it closed. The result was a fractured right index finger.

October 15, 2015 WY · Coal miner, prospector, nec STRIKING OR BUMPING
Thunder Basin Coal Company LLC · Struck against stationary object

The rescue team was conducting plant fire system familiarization training, when an owl flew off an overhead beam and swooped at a technician. His natural reaction was to duck and in the process, his chin hit a metal guard resulting in a broken tooth and a laceration requiring stitches.

August 30, 2015 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

A 2" X 10' web sling was laying across the hood of the dozer with a 3/4" shackle attached to one end and the other end on the OH crane hook. The mechanic was pulling the sling across the hood when the shackle struck him in the mouth. The result was a broken upper left tooth.

August 11, 2015 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A grass fire was discovered in the tall grass above 7&8 North Pre-strip area. The fire was not extinguished within 30 minutes. A motor grader and mine firefighting equipment extinguished the grass fire. No miners, mine equipment or structures were ever at risk during this fire event.

August 6, 2015 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from ladders

A miner was climbing down a ladder when it shifted forward. The miner fell approximately 6 to 8 feet onto the bed of his pickup. It is possible that he briefly lost consciousness upon impact.

July 22, 2015 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A fire was discovered in the tall grass above the 6 West pres-trip area. The fire was not extinguished within 30 minutes. A motor-grader and mine firefighting equipment extinguished the fire along with Campbell County Fire Dept. No miners or mine equipment and structures were ever at risk during this fire event.

July 22, 2015 WY · Coal drill operator SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

The drill was walking past DL11 when there was an engine failure which caused a fire. The operator shut the key off, actuated the fire suppression system and then immediately jumped out of the offside cab door to the ground. The result from jumping to the ground was a fractured left heel.

July 21, 2015 WY · Coal electrician, lineman HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

The electrician was in the process of opening an 8KV disconnect switch on a substation when his hand slipped off of the throw handle causing the handle to recoil, striking him on the right lower lip. The result was a laceration requiring stitches and a very minor chip of a tooth.

July 11, 2015 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A fire was discovered in the tall grass above the 6 West prestrip area at 1:50pm. The fire was not extinguished within 30 minutes. A motorgrader and mine fire fighting equipment extinguished the fire along with Campbell County Fire Dept. No miners or mine equipment and structures were ever at risk during this fire event.

July 7, 2015 WY · Coal beltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor rider HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between (Not Elsewhere Classified)

Employee pinched hand between a hitch ball and trailer coupler. Broke bone in left hand near joint between index finger and palm.

June 25, 2015 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer DISORDERS (REPEATED TRAUMA)
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

The haul truck driver has developed bone spurs and arthritis over a long period of time which has caused a narrowing of the space between the C4 & C5 vertebrae. This narrowed space due to the bone spurs has resulted in neck pain when operating equipment. He had an injection to reduce inflammation on 7/29/15 which makes this condition reportable as an illness.

June 23, 2015 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

A pit millwright and a dragline oiler were replacing a spreader bar pin to the upper chain when the weld on the pin's lifting-eye broke. The lifting-eye hit the dragline oiler in the mouth breaking a tooth and fracturing his jaw.

June 23, 2015 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

Ops techs were pulling slack up in the trailing cable with a pu truck with the tech on the ground being inside the slight radius of the cable. The action of the cable forming a straight line between the cable tree and the pu truck swept the tech's feet out from under him causing him to land on his left shoulder. A medical procedure on 7/9/15 makes this incident reportable.

May 2, 2015 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

A mechanic's right middle finger was pinched/smashed when the upper park brake assembly slipped while being removed from the left rear wheel motor on a haul truck. The result was a finger tip fracture and laceration requiring stitches.

April 4, 2015 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

An equipment operator walked up over a berm and when descending his knee buckled under him. He underwent a medical procedure on 4/8/2015. The procedure followed by restricted duty make this a reportable incident.

March 17, 2015 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

The tugger cables were being used to pull the front sloped house roof panel back into position when it became stuck. A millwright's left middle finger was pinched between the rope window edge and the channel frame of the panel when the panel shifted. The result was a laceration requiring stitches.

March 4, 2015 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

A pit millwright was using a come-a-long to lift a shovel track pad when the hook slipped off the pad striking him on the forehead above the right eye. The result was a laceration requiring stitches.

March 2, 2015 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech IGNITION OR EXPLOSION OF GAS OR DUST
Thunder Basin Coal Company LLC · Contact with hot objects or substances

Employee was clearing airline with methanol when a fire erupted causing burns to his face, neck, chest and hands.

February 15, 2015 WY · Coal welder (non-shop) MACHINERY
Thunder Basin Coal Company LLC · Struck by falling object

Employee was lifting a sheet of metal with the forklift to place on sawhorses. Sawhorses were not level and when employee tried to level the sheet of metal on them the metal fell and struck the employee on the back of the ankle. This resulted in a fractured left ankle.

February 4, 2015 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

A haul truck operator was walking from the haul truck to the man-trip at the end of shift when she slipped on a patch of snow covered ice causing her to fall backwards. The left wrist was fractured when the hands were outstretched to break the fall.

February 2, 2015 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer OTHER
Thunder Basin Coal Company LLC · (Not Elsewhere Classified)

A mayday was called for an unresponsive haul truck operator at the SH22. A loader operator boarded the haul truck and confirmed there was a medical emergency. He began chest compressions until mine rescue personnel arrived. The patient was then transferred to the public ambulance service. This was a medical emergency and not the result of an accident.

January 22, 2015 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Thunder Basin Coal Company LLC · Caught in, under or between running or meshing objects

A plant millwright was pushing on a wire rope cable to free up the feeder chain that was being pulled by the cable when his glove was pulled into a sheave, lacerating his right thumb, requiring stitches.

January 13, 2015 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

Employee was securing a down line to a wooden stake when a splinter entered the employee's right hand between the thumb and first finger as the employee was sliding his gloved hand along the wooden stake. Surgery was required to remove the wooden splinter and sutures were applied.

2014 · 20 incidents

December 31, 2014 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

The millwright was adjusting a web sling on the rod of the hydraulic hammer on the IT (Integrated Tool handler) when the rod was tilted downward, pinching/lacerating the millwright's left index finger requiring stitches.

December 30, 2014 WY · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

The left index finger was lacerated when picking up a piece of broken dozer blade, resulting in 9 stitches.

December 25, 2014 WY · Coal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

A millwright was replacing dump ropes and links on the arch of bucket. The new dump rope and link were installed and pinned on the left side. While attempting to install the keeper bolt, the rope and socket assembly slipped, pinching/amputating the end of the left index finger between the link and socket assembly.

December 9, 2014 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

Employee was using a hydraulic torque wrench (high torque) that slipped off the nut. The employee reached to catch the wrench at which time his left ring finger was pinched between the wrench and drag line hoist case

November 20, 2014 WY · Coal ENTRAPMENT
Thunder Basin Coal Company LLC · Accident type, without injuries

At 12:00 noon the HVAC technician was going to the top of the silo in the elevator when the elevator stopped near the top of the silo. The elevator passenger was never in any danger of being injured. This person was safely out of the elevator at 12:42 pm.

November 20, 2014 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A fire lasting approximately 50 minutes was discovered shortly after the primary crusher was unplugged. The stilling shed curtains were burned along with some coal that remained in the hopper.

November 3, 2014 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Thunder Basin Coal Company LLC · Struck by flying object

Heavy gust of wind blew dust and foreign material into eye requiring removal of material by optometrist.

October 18, 2014 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

Employee was performing a latch bar adjustment on the 28 shovel. While installing a shim, his right thumb was jolted in the latch bar assembly resulting in a fracture.

October 15, 2014 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

Using pipe wrench to back up while being tightened. Wrench broke and struck worker on left hand. Fractured left index finger

October 14, 2014 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

The wash-bay tech tripped and fell while walking backwards as she was guiding a water truck out of the wash-bay. Her left wrist was fractured when her outstretched hand was used to break her fall.

October 6, 2014 WY · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

The haul truck driver fell off the engine compartment ladder landing on the ground on her shoulder. This was a short fall that resulted in pain in her left shoulder. On 7/15/2015 she received medical treatment that makes this incident reportable.

October 3, 2014 WY · Coal electrician, lineman HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

An electrician was in the process of cutting the tape off a blower motor connection when the knife slipped and cut through his leather glove resulting in a laceration to his left hand that required stitches.

September 18, 2014 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Struck by... (Not Elsewhere Classified)

The mechanic was struck under the chin by a 1" nut when attempting to pull the right tie rod pin from a haul truck. The result was a chipped tooth and two small lacerations that required stitches.

September 12, 2014 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Thunder Basin Coal Company LLC · Over-exertion in pulling or pushing objects

While loosening a plug with a ratchet the injured employee felt a pull in his shoulder/neck area which was diagnosed as a strained muscle and resulted in restricted duty.

September 7, 2014 WY · Coal FIRE
Thunder Basin Coal Company LLC · Accident type, without injuries

A fire on DR23 was discovered by a nearby loader operator approximately 1 hour after maintenance personal had finished removing the Kelly drive bushing. The fire was discovered at 11:08 and MSHA was notified at 11:41 due to the fire not being extinguished within 30 minutes.

July 25, 2014 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

An equipment operator's left middle finger was pinched/smashed while positioning the latch bar on a shovel dipper to change the shim pack. When the latch-lever was lowered onto the prop device, the prop shifted and pinched the technician's finger. The result was a laceration that required stitches.

June 10, 2014 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall down stairs

Employee was exiting the change room during a heavy rainfall when he slipped and lost his balance on the stairway landing causing him to fall. The employee received a laceration on his left hand as a result of the fall requiring sutures to close the wound.

April 18, 2014 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion (Not Elsewhere Classified)

The mechanic twisted his right ankle when dismounting the engine access ladder on a haul truck. He received a treatment that makes this injury reportable on 5/9/2014.

March 13, 2014 WY · Coal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Over-exertion in lifting objects

While riffling coal sample, employee lifted the hinged door (approx. 1 - 2 lbs.) to riffle and complained of shoulder pain afterwards 03/28/14 Dr. ordered tests and restriction - do not return to work until evaluated - workers' comp has made no decision at this time

March 7, 2014 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

The mechanic was pulling a wheeled oil drain cart across the shop floor when a wheel hit a small obstacle on the floor causing the handle he was pulling on to deflect. This unexpected movement pinched his finger between the handle and a nearby bolt bin. The result was a smashed little finger on his right hand that required stitches.