Mining Incidents

Pacific Plant Metal/Non-Metal

Controlled by USS Holdings Inc
St Louis, St Louis County, MO  ·  Active
MSHA Mine ID: 2300544

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Fatalities
0
Total incidents
44
Years on record
2000–2026
Latest incident
Jan 2026
Compliance record
MSHA citations since 2000
233
citations
42
significant & substantial
$82,216
proposed penalties
$69,698
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 29,939 2 0 66.8
2025 Q3 22,717 0 0 0.0
2025 Q2 10,571 4 1 378.4
2025 Q1 3,633 0 0 0.0
2024 Q4 21,970 4 1 182.1
2024 Q3 26,554 4 0 150.6
2024 Q2 3,152 1 0 317.3
2024 Q1 3,472 0 0 0.0
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.

Reportable incidents

44 on file

2026 · 1 incident

January 31, 2026 MO · Metal/Non-Metal dryer operator, kiln operator, dry plant operator, fluid operator, bed dryer operator HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

Employee was helping free a frozen switch when they lost grip and stumbled backwards. Right knee injury occurred and employee was able to continue work activities until surgery restrictions put into place on 3/26/2026

2023 · 1 incident

January 6, 2023 MO · Metal/Non-Metal electrician, lineman HANDTOOLS (NONPOWERED)
U.S. Silica Company, LLC · Struck by... (Not Elsewhere Classified)

Employee was holding a lug in the left hand and cutting it with a porta band saw in the right hand. The porta band saw slipped and lacerated the left index finger and slightly cut the long finger. Employee received six sutures and was returned to work full duty, no restrictions, no prescriptions.

2022 · 3 incidents

December 8, 2022 MO · Metal/Non-Metal laborer, bull gang, parts runner, roustabout, roof trimmer/scaler FALL OF ROOF OR BACK
U.S. Silica Company, LLC · Struck by falling object

While drilling holes for roof bolts and mesh with a jackleg drill, a section of roof fell on two miners. The individual for this report suffered fractures to the tibia, fibula, and 3 vertebrae.

December 5, 2022 MO · Metal/Non-Metal plumber, pipefitter, millwright HANDTOOLS (NONPOWERED)
U.S. Silica Company, LLC · Caught in, under or between a moving and a stationary object

Employee was installing shaft and bearing housing. Mounting bolt was not aligned. Employee used a pry bar to lift the housing in order to reposition the bolt. The employee reached under the housing and the pry bar slipped. Fourth finger was pinched between housing and mounting surface fracturing tip of finger and requiring stitches.

August 17, 2022 MO · Metal/Non-Metal plumber, pipefitter, millwright MACHINERY
U.S. Silica Company, LLC · Caught in, under or between running or meshing objects

Employees working at the end of the day. Employees wearing full-face PAPRs. Employees noticed fan blades making contact with housing. Employees were on opposite sides of the fan unit. One employee rotated the fan side to find contact areas. Employee on the other side attempted to assist rotation and pinched finger between the pulley and fan belt.

2020 · 1 incident

March 5, 2020 MO · Metal/Non-Metal car trimmer, car loader, bin puller, truck loader MACHINERY
U.S. Silica Company, LLC · Struck against a moving object

Employee was injured in the track mobile during a collision. *Second submission. Spoke with MSHA help desk 3/16 and had uploading error.

2018 · 3 incidents

July 10, 2018 MO · Metal/Non-Metal miner, prospector, nec SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

Employee stepped over process line during clean up activities and rolled ankle. Felt they could self treat until 7/20/18 when they requested to see Dr. Evaluation with the Dr. on 7/20/18 discovered non-displaced fracture to distal fibula and placed on restrictions.

May 19, 2018 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
U.S. Silica Company, LLC · Struck by falling object

Employee was removing liner from ball mill. A pneumatic jack was holding the mill in place. The jack failed and the mill turned 180 degrees. An employee inside the mill was injured from the fall/flying debris.

April 8, 2018 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
U.S. Silica Company, LLC · Caught in, under or between a moving and a stationary object

Employee was pushing a pallet into the bulk sacker and pinched a thumb on the rollers. 8 stitches was placed on the thumb.

2017 · 2 incidents

November 30, 2017 MO · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
U.S. Silica Company, LLC · Struck against a moving object

Employee stated that while operating a loader in the pit, employee backed into a depression and jarred back. Employee requested medical treatment on 12/04/2017 and was given work restrictions.

September 5, 2017 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Fall from machine

The employee stated ee fell as ee was dismounting the truck.

2016 · 2 incidents

October 12, 2016 MO · Metal/Non-Metal utility man, shift tech, service/dump truck operator SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

Employee was going down 2 steps, rolled foot/ankle and suffered a fracture to 5th metatarsal.

September 21, 2016 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
U.S. Silica Company, LLC · Struck by flying object

Maintenance employee was trying to unclog transport pipe, as they were attempting to pressurize pipe, end cap blew off and struck ee in hand.

2015 · 1 incident

November 17, 2015 MO · Metal/Non-Metal outside foreman, leadman SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

Employee was working on the Caribs Fall Protection unit for trucks. He reports that he felt a pop to his knee when he stepped over a magnetic gate. Afterwards he reported pain when walking. Employee received restricted duty from initial medical provider.

2014 · 3 incidents

September 15, 2014 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

Employee was tightening bench vise and felt discomfort in his shoulder. Employee delayed medical treatment until 9/18/14.

September 2, 2014 MO · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

Employee stepped out of company truck and had discomfort in hip. Employee delayed treatment until 9/11/14. Employee became reportable on 9/22/14 when he received physical therapy.

June 12, 2014 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

while working on replacing an arm of the auto package system employee had to kneel on a chain conveyor. when employee moved off the conveyor for break, he felt stiffness in his back. employee did not receive medical attention until 7/10/14 as he thought pain would go away.

2012 · 3 incidents

May 21, 2012 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
U.S. Silica Company, LLC · Struck against stationary object

Employee was attempting to close a railcar door latch. The latch wouldn't go down to the locking position. Employee then, using heel of his foot, kicked the latch to close completely.On 5/22 employee received x-ray for foot being swolle,diagnosed with inflammation in foot.

April 29, 2012 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

Employee went to turn around after picking up tools and felt sharp pain in knee. employee received MRI on May 16th indicating a tear in his meniscus.

February 15, 2012 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
U.S. Silica Company, LLC · Struck by... (Not Elsewhere Classified)

Employee was attempting to cut a rubber hose with a utility knife. Employee was cutting towards his body and broke through the hose and his motion caused him to cut his leg with the utility knife. Cut was small and clean, back to work in 2 hours from hospital

2010 · 3 incidents

December 22, 2010 MO · Metal/Non-Metal pumper HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion in lifting objects

Employee was moving 50 lb bags on a pallet when he jammed his wrist. Did not seek medical treatment until 3/14/11 and became reportable when employee went to physical therapy on 3/21/11. Employee stayed at full duty the whole time.

March 26, 2010 MO · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver OTHER
U.S. Silica Company, LLC · Unclassified, insufficient data

Customer's over the road truck driver was found unconscious near the truck scale.

February 12, 2010 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Fall onto or against objects

Maintenance employee was preparing to weld on 6DC9 dust collector. He was carrying a six foot step ladder on his right shoulder and a five-gallon bucket in his left hand. While walking around the dust collector, the employee fell on a maintenance access ladder. Employee suffered a contusion to the right elbow.

2009 · 1 incident

September 29, 2009 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

Employee reported pain in right shoulder on 9/10/09 but didn't want to seek medical treatment as he though it was something minor. On 9/29/09 employee was attempting to release hand brake on a railcar when he felt a sharp pain in his right shoulder. Employee sent to medical center on 9/30/09 and was diagnosed with sprain in right rotator cuff.

2008 · 2 incidents

July 7, 2008 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
U.S. Silica Company, LLC · Struck by falling object

Employee was cutting skaker deck apart to send off for repair. While attempting to remove motor from frame, part of the beam holding the motor would not come loose, as the cuts were not completely through the frame. Employee bent down to grab cutting torch when the weld broke causing the edge of the motor to contact the left side of employee's face.

March 3, 2008 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
U.S. Silica Company, LLC · Struck by falling object

Employee was wiping up oil from maintenance shop floor, while another employee was stacking three wooden pallets up. While cleaning floor, one pallet fell onto left index finger cutting it.

2007 · 2 incidents

July 17, 2007 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
U.S. Silica Company, LLC · Struck by flying object

Feedbox on #5 mill was jammed up with ground silica material. Employee shut down mill and cleaned feedbox out. Employee started mill back up after completing cleaning. Feedbox again jammed up, due to fines from seperator. Air blast occurred splashing product into employee's eyes.

April 17, 2007 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
U.S. Silica Company, LLC · Struck by falling object

Employee was repositioning a 50lb bag of sand when he stepped on a pallet lift. The lift had a bolt break. The lift fell on the employee's foot. He went to doctor on 5-7-07. Doctor said looks like swelling; come back if anymore problems. Emp. went back during Sept. Doctor said surgery would take care of cyst on 9-10-07.

2006 · 3 incidents

November 28, 2006 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

Employee was going to empty a wheelbarrow of sand, while in the process of pushing the wheelbarrow, the employee stepped over a piece of grating that was bowed. The employee twisted his knee when he stepped on the grating. Employee did not go to doctor until 12/11/06. Employee waited to see if the swelling went down before going to see a doctor.

August 18, 2006 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

emp. was attempting to release hand brake on railcar. He grabbed a 3-foot bar and placed to release brake. emp, felt pain in left shoulder. Emp, went to doctor six days later. doctor said no findings, in 04/07 he asked for 2nd opinion. worker's comp and attorney have been disbuting claim. finally a specialist elected to have surgery. 1st day of work missed was 12/3/07

January 13, 2006 MO · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
U.S. Silica Company, LLC · Struck by flying object

Employee was moving pipe with back hoe equipment, carrying pipe between the knuckle and using the bucket for support. Employee's safety glasses became fogged up due to cold weather. Employee stopped to wipe off glasses when the pipe fell into the water/sand area, which splashed up into employee's eye.

2005 · 2 incidents

November 3, 2005 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
U.S. Silica Company, LLC · Struck against a moving object

Rail car brakes not working properly.

March 13, 2005 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion in lifting objects

Two employees were installing a press in the QA Lab, as they were lifting it into place one employee felt a pull in his left hip, resulting in a low back strain. The incident was not reported to management until 03/21/2005.

2004 · 2 incidents

November 18, 2004 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion in lifting objects

Lumbar strain occured during normal work activities as a Micron Bagger. This entails lifting and turning with up to 50 lbs. of bagged material.

October 8, 2004 MO · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion in lifting objects

Injured right wrist doing normal activities of processing whole grain sand samples. Was lifting buckets and splitting the samples down to run screen analysis.

2003 · 1 incident

June 10, 2003 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Caught in, under or between (Not Elsewhere Classified)

EE WAS ATTEMPTING TO REMOVE A HOIST OPERATED LOADING CHUTE FROM A HOLE OF A RAILCAR. THE CHUTE JAMMED AND THE HOIST TRIPPED ITS OVERLOAD. EE PLACED HAND NEAR CHUTE PIVOT END TO SEE IF CHUTE WA S PLUGGED AND FULL. EE LOST HIS BALANCE AS HE RELEASE THE PIVOT END. THE PIVOT END SWUNG DOWN. SMASHING HIS LEFT FINGER AGAINST THE HOLE OPENING. 12 SUTURES & FRACTURED TIP OF FINGER.

2002 · 1 incident

May 3, 2002 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion in lifting objects

DURING THE NORMAL COURSE OF FILLING AND PALLETIZING FIFTY POUND BAGS, EE SQUATTED DOWN TO REMOVE A BAG FROM THE BAGGING MACHINE AND FELT A PAIN IN HIS LEFT KNEE. AFTER VISITING THE DR, WE FOUN D OUT THE KNEE WAS SPRAINED.

2001 · 4 incidents

March 15, 2001 MO · Metal/Non-Metal barge/boat/dredge/towbarge/towboat/leach operator, riverman, deck hand SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Fall from machine

FOOT SLIPPED WHILE DESCENDING LADDER ON RAIL CAR, AND FELL TO PAVEMENT.

February 12, 2001 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion (Not Elsewhere Classified)

WHILE ATTEMPTING O OPEN TOP DOOR OF RAILCAR, EE STRAINED BACK. DOOR MAY HAVE BEEN FROZEN TO CAR.

January 29, 2001 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
U.S. Silica Company, LLC · Struck by falling object

WHILE CLIMBING LADDER, THE LADDER SLIPPED, THE EMPLOYEE JUMPED TO GROUND, THE LADDER LANDED ON RIGHT FOOT BEHIND THE PROTECTIVE TOE GUARD.

January 26, 2001 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Fall to the walkway or working surface

CARRYING PIECE OF ANGLE IRON ON ICY ROAD. SLIPPED AND FELL ONTO BACK. RECIEVED DIAGNOISS OF FRACTURE ON 3-19-01.

2000 · 3 incidents

July 24, 2000 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
U.S. Silica Company, LLC · Fall onto or against objects

MECHANIC KNEELING DOWN TO REMOVE BOLTS FROM PUMP BASE, WHILE DOING SO, FOOT SLIPPED AND HIT KNEE ON 4" PIPE.

July 4, 2000 MO · Metal/Non-Metal miner, nec HANDLING OF MATERIALS
U.S. Silica Company, LLC · Over-exertion in pulling or pushing objects

WHILE PREPARING CAR TO BE LOADED, HE STRAINED BACK TRYING TO OPEN LONG GRAIN DOOR--SPRING LOADED. STANDING ON CENTER LATCH CONTRIBUTED.

May 8, 2000 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
U.S. Silica Company, LLC · Struck by... (Not Elsewhere Classified)

WHILE UNPLUGGING FEED BOX OF #6 MILL, ROD CAUGHT ON FEED AUGER SMASHING FINGER AGAINST FEED BOX. EE WAS TREATED FOR CONTUSION AND PARTIALLY REMOVED FINGERNAIL. DOCTOR CLEANED AREA AND OPTED TO SUTURE FINGERNAIL INTO PLACE. BANDAGED.