Mining Incidents

Cedar Ridge Stone QuarryMetal/Nonmetal

Semco Stone · Surface
Controlled by Doug Black
Perryville, Perry County, MO · Active
MSHA Mine ID: 2302273
Fatalities
0
Total incidents
106
Years on record
2004–2026
Latest incident
Mar 2026
No fatalities recorded at this mine.

Reportable incidents

106 on file

2026 · 1 incident

Caught in, under or between a moving and a stationary object

Employee was moving rock forward on rollers and smashed a finger.

2025 · 1 incident

Struck by rolling or sliding object

Employee was turning a rock on the turn table when the rock rolled over smashing their fingers

2024 · 7 incidents

Struck by falling object

Went to grab a piece of rock and another piece fell on EE's hand.

Caught in, under or between a moving and a stationary object

Splitting rock. Material broke and tried to catch falling rock. ended up pinching hand in between 2 rocks.

Struck by falling object

EE was moving a rock on the splitter when the material broke smashing EE's hand.

Struck by flying object

Working splitter and wind blew through overhead door blowing foreign object into associate's eye.

Caught in, under or between a moving and a stationary object

Was Racking a rock off incline of the thin veneer saw and rock rolled onto a finger.

Over-exertion in pulling or pushing objects

Pulling on a rock to get it ready to split in the splitter. Employee said employee heard a tear in the shoulder area.

Struck by... (Not Elsewhere Classified)

Clean out plate flipped up smashing finger between plate and chisel.

2023 · 5 incidents

Struck by... (Not Elsewhere Classified)

Employee was building pallets in back of fabrication shop. When nailing pieces of wood together with nail gun, nail did not go into wood like planned. Instead it bounced off wood and recoiled the nail where employee was holding the piece of wood, puncturing EE's finger.

Caught in, under or between a moving and a stationary object

Was moving a stone with crowbar. It slipped out from under stone and the edge of the stone landed on the edge of employees hand. EE went to hospital after work but finished working the rest of the day.

Contact with hot objects or substances

Trying to start a fire in the woodstove, resulted in a burn on left hand.

Caught in, under or between a moving and a stationary object

Stacking rock when the rock slid smashing left index finger between 2 rocks.

Caught in, under or between a moving and a stationary object

Pulling a rock onto the loader table. The rock slid smashing employees finger between 2 rocks.

2022 · 13 incidents

Caught in, under or between a moving and a stationary object

Rolling Rock forward on table smashing thumb between 2 rocks.

Struck by flying object

Using Rock Splitter, Piece of Rock shot out from splitter and hit employee in the stomach.

Struck by falling object

When chipping a rock, a chip of rock came off hitting EE's left forearm

Caught in, under or between a moving and a stationary object

Picking up rock and another rock fell over smashing finger.

Struck by falling object

Piece of rock fell off top layer and landed on EE's hand between another rock.

Struck by falling object

Employee was running tumbler and rock went into bucket. Rock tipped over onto employees foot in front of steel toe where laces are.

Struck against stationary object

When sweeping the floor, employee bumped finger on a metal dumpster.

Over-exertion (Not Elsewhere Classified)

Leaning over the belt to pick a rock up and the employee felt something pop in the back of the knee.

Struck by falling object

Employee had a piece of rock fall off pallet and hit EE in the back of EE's leg by EE's Achilles tendon. EE and another EE were working together. Other EE tried to give warning and stop rock from falling.

Struck by... (Not Elsewhere Classified)

Using a sledge hammer and the handle cracked, cutting the right hand.

Struck by falling object

Operator of loader was taking slab of stone off conveyor. Slab shifted on forks, fell off of forks, hit the guard rail. Guard rail fell off and hit operator's foot.

Fall to the walkway or working surface

Was walking to EE's car at breaktime. Stepped on black ice, slipped and fell on EE's back.

Caught in, under or between running or meshing objects

Had hand sitting by belt guard. Belt grabbed EE's left hand and pulled it under roller of the splitter.

2021 · 5 incidents

Caught in, under or between a moving and a stationary object

Splitting slabs of rock - got hand caught under splitter

Struck by falling object

Employee was rolling rock on the splitter and the rock fell off the side of the splitter and hit EE's foot.

Struck by... (Not Elsewhere Classified)

Use hand held grinder on stone - saw kicked back and cut EE's hand.

Over-exertion in lifting objects

Standard laboring - stacking rock

Struck by flying object

Using ratchet strap that recoiled when releasing.

2020 · 3 incidents

Struck by... (Not Elsewhere Classified)

EE was using a hammer to correct the stone shape while holding veneer with left hand. While striking with the hammer, EE hit left thumb.

Over-exertion in lifting objects

Employee was stacking rock and twisted the wrong way and felt pain.

Over-exertion (Not Elsewhere Classified)

Slipped on floor that had a small amount of water, near our incline conveyor that exits waste, due to rain. Hurt EE's left knee

2019 · 5 incidents

Struck by... (Not Elsewhere Classified)

EE smashed hand while operating splitter. EE was standing by the splitter afterwards and was very quiet. EE went to step away from the machine and lost consciousness from pain in hand - EE then struck head causing a gash above the right eye.

Struck by... (Not Elsewhere Classified)

Chipping stone with a hammer and accidentally smashed EE's fingers between hammer and stone

Over-exertion in lifting objects

Employee was picking up small waste rock from floor.

Over-exertion (Not Elsewhere Classified)

Slipped walking down steps into quarry. All weight shifted onto one leg at an awkward angle.

Caught in, under or between a moving and a stationary object

Employee was stacking rock coming off one conveyor to another. EE right hand got caught between roller guard and belt

2018 · 2 incidents

Caught in, under or between a moving and a stationary object

Rock broke and smashed employees hand between 2 rocks on Splitter.

Over-exertion in pulling or pushing objects

Stacking stone and lower back popped

2017 · 3 incidents

Caught in, under or between a moving and a stationary object

Stacking rocks in pallet and pinched finger between two stones.

Fall to the walkway or working surface

Employee stated that employee grabbed a rock off of the conveyor belt, turn to palatalize the rock and as employee did, employee heard employee's knee pop. Employee's knee/leg then gave out and employee fell to the ground

Caught in, under or between a moving and a stationary object

A block of stone was cut into slabs on our MEM Saw. We flipped the block to cut the back side lips off and then re-loaded it onto the beams to be cut again. EE was lining up the wire for the cut, the block broke and pinned EE's legs against the wall of the MEM. EE was taken directly to the hospital and diagnosed with a compound fracture in left leg.

2016 · 1 incident

Caught in, under or between a moving and a stationary object

Miner was splitting a rock and EE's left index finger was caught between the rock and a porn of the splitter. The finger was treated at the local walk in clinic without significant damage done to the miner.

2015 · 2 incidents

Bodily reaction, (Not Elsewhere Classified)

Employee bent over the wire basket to pick up a piece of veneer and when he did, he had a pain go through his lower back.

Struck by... (Not Elsewhere Classified)

Supervisor was pulling pin out of guide, that was used as an anchor. Pin was tight causing it to go air born when free. When pin came down it struck employee on the top of his head causing a slight laceration to the crown of the employee's scalp.

2014 · 3 incidents

Over-exertion in lifting objects

Operator was stacking stone veneer when he felt pain in his right leg, lower right back and upper left back.

Struck by flying object

Foreign object flew into right eye while operator was driving a John Deere loader.

Caught in, under or between (Not Elsewhere Classified)

closing metal cover on motor enclosure and caught left ring finger between cover and frame mashing the tip

2013 · 4 incidents

Caught in, under or between (Not Elsewhere Classified)

Lost balance and fell. while falling, operator reached out with his right hand to break his fall and caught it between the belt and the guard on a conveyor.

Over-exertion (Not Elsewhere Classified)

manually moving stone slab on roller conveyor

Over-exertion in lifting objects

While palletizing dimensional stone,operator strained right shoulder.

Over-exertion (Not Elsewhere Classified)

Stepping off haul truck ladder onto ground causing pain in right leg.

2012 · 2 incidents

Over-exertion in lifting objects

Lifting stones and stacking them on a pallet.

Over-exertion in pulling or pushing objects

Pulled a piece of stone on roller conveyor into splitter and strained his back.

2011 · 4 incidents

Caught in, under or between a moving and a stationary object

While splitting a piece of stone, the stone kicked up and pinched the operator's finger between the stone and the frame of the machine

Caught in, under or between a moving and a stationary object

moving a slab of stone on a work bench and caught tip of finger between table and stone

Struck by falling object

While operator was performing a splitting operation, a slab of stone fell and caught the operator's left arm causing an abrasion.

Over-exertion (Not Elsewhere Classified)

While shrink wrapping a pallet of stone the employee bent over and pulled a muscle in his lower back.

2010 · 4 incidents

Struck against stationary object

While moving a pallet of stone slabs ,operator extended forks on the Teledyne fork lift to set pallet on floor.In doing so the machine tilted forward and operator hit his head on the roll cage causing a laceration above left eye.

Over-exertion in pulling or pushing objects

In the process of replacing a conveyor belt, the employee was pulling the new belt into place and strained his lower back.

Over-exertion (Not Elsewhere Classified)

EMPLOYEE TRIPPED,AND WHILE TRYING TO BREAK HIS FALL,GRABBED THE WALL WHERE A NAIL WAS EXPOSED AND CUT HIS HAND ON THE WALL

Caught in, under or between (Not Elsewhere Classified)

Unloading slabs of stone from saw by hand to a pallet and caught his fingers between two slabs. Pinched tips of 3rd and 4th finger of left hand. Mangled tip of 3rd finger. No broken bones.

2009 · 3 incidents

Over-exertion (Not Elsewhere Classified)

Employee was walking on gravel lot outside fabrication building and twisted his left ankle.

Over-exertion in lifting objects

Went to Landmart Gas Co. to get a propane tank. Employee helped the supervisor lift a 100lb propane tank and carry to truck. The employee complained of lower back pain, but indicated he could return to work. He continued work, handling stone and buidling sample stone panels. Later in the shift he experienced severe back pain and had to be taken to hospital.

Over-exertion in pulling or pushing objects

Employee was assisting another operator to reposition a rock slab on a conveyor and strained his right shoulder.

2008 · 7 incidents

Struck against stationary object

Employee was cutting stone veneer corners with a Target saw. The stone kicked up pushing his right hand thumb into the blade resulting in a laceration.

Struck by... (Not Elsewhere Classified)

Employee was building pallets with a nail gun and he laid it on the ground. When he walked around the pallet he kicked the gun with his left foot and apparently loose gravel caused the trigger to depress and fire a nail into his foot.

Over-exertion (Not Elsewhere Classified)

Employee was using a chipping hammer to chip rough edge off stone product and experienced pain in his right forearm.

Struck against stationary object

Employee was stacking veneer and bumped his knee on the turn table. He refused first aid and medical treatment on the date of the accident. On 2/6/07 he complained of knee pain and requested to go for medical treatment attributing the knee pain to the incident on 1/25/08.

Bodily reaction, (Not Elsewhere Classified)

While performing the morning stretching exercises, the operator twisted his back and strained his back.

Caught in, under or between a moving and a stationary object

Operator smashed finger when stacking rock on a pallet

Struck by... (Not Elsewhere Classified)

Operator was cutting stone on the target saw and a rock chip got behind his glasses and into his left eye.

2007 · 12 incidents

Struck against stationary object

Walking around the work area, operator stepped on a rock on the floor and twisted his right ankle.

Caught in, under or between a moving and a stationary object

Stacking stone and smashed fingers on right hand between stones.

Caught in, under or between a moving and a stationary object

Employee was turning over a slab and caught his right index finger between two slabs resulting in a cut.

Over-exertion in lifting objects

Employee was lifting a piece of stone off the conveyor belt and felt a pain in his lower back.

Struck by flying object

Two employees were replacing the conveyor belt with metal lacing. One was hammering the metal lace and a piece broke off and embedded in the other employee's right forearm.

Over-exertion in wielding or throwing objects

Employee was chipping rock with a hammer and felt pain in his right forearm.

Over-exertion (Not Elsewhere Classified)

Employee was climbing down out of the Teledyne forklift and twisted his back when stepping down.

Contact with heat

Employee had come inside at the end of the shift to clock out. The day was hot and he felt ill and passed out briefly. He hit his head on the floor when he collapsed. He was transported to the hospital in an ambulance for evaluation/treatment.

Struck by... (Not Elsewhere Classified)

Employee was cutting stone with the Target saw. The stone flipped over while cutting, smashing his right index finger.

Struck by flying object

Employee was chipping edge off a piece of stone with hammer. Rock chips struck his face. The employee was wearing safety glasses. He did not feel anything go into his eye. Later that evening after he left work his left eye starting bothering him. He flushed the eye, but continued to have irritation. In the morning he reported it to his supervisor and was sent to the doctor.

Struck by... (Not Elsewhere Classified)

The employee was using a table saw in the maintenance shop to cut wood shims for the target saws in the saw shop. While ripping short pieces lengthwise, the piece jumped and the operator got his left hand fingers in the saw blade causing a laceration on three fingers

Over-exertion in lifting objects

Employee was stacking rock on pallets at end of conveyor. While picking up a stone he experienced pain in his right shoulder and neck.

2006 · 11 incidents

Over-exertion (Not Elsewhere Classified)

Employee has right elbow soreness from cleaning silt from the floor drains.

Over-exertion (Not Elsewhere Classified)

The employee complained of pain in the left shoulder and arm due to operating a Teledyne forklift on the yard over a two week period.

Over-exertion in pulling or pushing objects

Employee was positioning stone on the feed conveyor to the hydraulic splitter. He was pushing/pulling on the stone and experienced left shoulder pain.

Over-exertion in lifting objects

Employee reported the injury to the supervisor on 10/10/06. Employee complained of lower back pain from stacking stone the previous day.

Over-exertion in lifting objects

Positioning stone blocks on feed conveyor to the splitter. Employee complained of lower back pain several hours into the shift.

Struck by flying object

Employee was unloading and palletizing stone off the exit conveyor of the TXS saw. He also had to knock off the rough edge of some of the stone coming out of the saw. He struck the rough edge of the stone against the metal conveyor frame to break off the rough edge and a piece went under the safety glasses and into his right eye.

Struck by... (Not Elsewhere Classified)

While stacking stone on a pallet in the outside yard the employee picked up a stone. It slipped in his right hand and caused a laceration to his pinky and ring finger.

Over-exertion in lifting objects

Employee was feeding rock on the conveyor to the TXS saw. He was experiencing pain in his left hip.

Struck by falling object

While stacking rock, the rock slipped and dropped on his right hand, smashing his 4th finger.

Struck by... (Not Elsewhere Classified)

Accident was reported on 7/18/06.Employee indicated that he had dropped a rock on his ankle when stacking rock. His left ankle was swollen and bruised.

Caught in, under or between (Not Elsewhere Classified)

The operator was splitting stone and the stone kicked up and smashed left middle finger between stone and splitter head. *E-document #298451.EE had an appt. with the Dr. 6 wks. after he had been released to full duty to check on the status of the fractured finger. The Dr. indicated that he aggravated the condition and that it required further treatment.

2005 · 5 incidents

Over-exertion in lifting objects

The employee was hand stacking rock on a pallet throughout the shift. At the end of the shift the employee complained of his back hurting. He indicated that there was no specific time that the injury occurred, just that his back was hurting.

Struck by... (Not Elsewhere Classified)

The exit conveyor belt on the hydraulic splitter was torn. The employee was trying to splice the belt back together using wire. He was trying to punch a hole through the belt for the wire with a locking blade knife (rather than drilling holes as prescribed). The twisting motion unlocked the blade, and the blade unlocked and resulted in laceration to the right index finger.

Struck against stationary object

Operator was outside cleaning up on the yard area, he was stepping down off the forklift to pickup material on the ground. He stepped onto a piece of rock and twisted/sprained his right ankle.

Caught in, under or between a moving and a stationary object

Operator was using a hydraulic splitter to split ends off of rock. While splitting the rock, the rock kicked sideways catching the left middle finger between the rock and the frame of the splitter, cutting the left middle finger.

Struck against a moving object

Driving the loader during the shift. EE said he was not experiencing any pain in the morning at the beginning of the shift. He started experiencing some pain by 9:30 a.m., but did not report this to the supervisor. By 11:15 a.m. he informed the supervisor that his back was hurting and he needed to see a doctor.

2004 · 3 incidents

Over-exertion (Not Elsewhere Classified)

EE WAS LOADING ROCK ONTO THE FEED CONVEYOR FOR THE THIN VENEER SAW. HE COMPLAINED OF PAIN IN HIS BACK.

Over-exertion (Not Elsewhere Classified)

TWO WORKERS WERE LOADING A SLAB OF STONE ON THE EQUIPMENT. INJURED PULLED A MUSCLE IN SHOULDER.

Struck by falling object

EE WAS LOADING STONE ONTO THE CONVEYOR FOR THE THIN VENEER SAW. A STONE FELL OFF THE PALLET HE WAS UNSTACKING ONTO HIS FOOT.