Mining Incidents

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Every injury and fatality MSHA has on file. Filter by state, year, sector, classification, experience, or any keyword from the investigator's narrative.

Total incidents
273,095
Of which fatal
1,202
Years on record
2000–2026
Classifications
20
Filters 2 active
Time period
Experience at time of incident

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The record

118 matching records

Showing 50 of 118
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 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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

January 23, 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

While walking across a flat area of packed snow, employee slipped and fell, resulting in fractures to the scapula.

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.

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.

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.

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.

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.

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 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 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.

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.

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.

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.

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.

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.

December 7, 2013 WY · Coal pumper SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

At the beginning of shift while performing a walk-around inspection on a pit bus; a technician walked from the front of the bus to the driver's side and tripped over a rock in the dark which caused EE to fall to the ground. EE's left forearm was fractured.

November 26, 2013 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

A technician was walking from the weld shop to the tool connex when he stumbled/tripped on the uneven ground catching himself with his right hand/arm. He attempted to catch himself with his fully extended arm, causing a fracture to his shoulder.

October 18, 2013 WY · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

On October 15, 2013 a technician was pulling on a pump suction line that was stuck in the mud. When the hose broke loose, the technician fell backwards with his feet stuck in the mud, twisting his knee. He had a medical procedure on December 19,2013 that makes this incident reportable.

October 13, 2013 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

While walking towards office area, technician turned his head to communicate with other technician and tripped on battery box, causing him to fall, dislocating right shoulder when contacting the ground.

September 10, 2013 WY · Coal greaser, grease man, oiler, lube man, dragline oiler SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

On 9/10/13 a fuel/lube tech was standing on the right side bumper of a FE loader assisting the operator to bleed the fuel system. The operator's hand slipped while spinning the fuel filter. The fuel/lube tech was bumped, causing him to fall off the bumper (approximately 4') to the ground. On 10/22, the fuel/lube tech had a medical procedure that makes this incident reportable.

August 20, 2013 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 technician was assisting in reeving a new rope through the retract horn on top of the shovel bucket when the rope moved unexpectedly causing the technician to lose his balance and fall onto the ground causing a hip and hand fracture.

May 11, 2013 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

Technician was checking the engine oil on a haul truck when she slipped on the access ladder and fell, landing on her left shoulder. She continued to operate a haul truck while following up with a doctor. On July 23 she had a medical procedure that makes the incident reportable.

March 30, 2013 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)

While working at the center section of a front end loader, the mechanic slipped and caught his full body weight with his left arm and shoulder when he grabbed a hydraulic hose to regain his balance. He had a medical procedure on 5/1/2013 that makes this incident reportable.

January 18, 2013 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)

The millwright placed his right foot on the bottom step of a motor grader when he says he felt something pop in his left knee. On February 14 he had a medical procedure that makes this event reportable.

March 30, 2012 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall from machine

While employee was climbing ladder on the haul truck his left hand slipped from the handrail and employee lost his grip falling to the ground fracturing his left ankle.

February 22, 2012 WY · Coal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to the walkway or working surface

The plant technician fell, fracturing his right clavicle while washing down the silo head house. Underlying medical conditions were the reason for the fall. A letter of explanation has been sent with the MSHA 7000-1 form upon submission.

January 2, 2012 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 onto or against objects

Employee had stepped over the tongue of a skid steer trailer carrying 3 rolls of cord. As the employee's second foot contacted the ground after step over, his foot slipped and he lost balance causing him to fall backwards onto the tongue of the skid steer trailer fracturing three ribs on his right side. Walking surface was melting snow and ice.

Showing 50 of 118