Mining Incidents

Omya Arizona Metal/Non-Metal

Omya Inc · Surface
Controlled by Omya Industries Inc
Superior, Pinal County, AZ  ·  Active
MSHA Mine ID: 0202614

Omya Arizona has $66K in proposed MSHA penalties and $120 outstanding across 10 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
30
Years on record
1997–2026
Latest incident
May 2026
Compliance record
MSHA citations since 2001
141
citations
23
significant & substantial
$65,653
proposed penalties
$54,995
paid to date
84% of proposed penalties paid to date, a $10,658 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
77
inspections on record
1,137
inspection hours
12.4
citations per 100 inspection hours
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
141 citations across 1,137 inspection hours.
Source: MSHA inspections data, updated weekly.

Omya Arizona has $66K in proposed MSHA penalties and $120 outstanding across 10 contested dockets.

Penalty disposition
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$66K
proposed penalties
$55K
current assessed
$55K
paid to date
$120
outstanding
139 assessments are final orders; 10 contested dockets.
As of the most recent assessment on 2026-02-12.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Quarterly safety rates
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2025 Q4 14,306 0 0 0.0
2025 Q3 15,302 4 2 261.4
2025 Q2 13,118 0 0 0.0
2025 Q1 13,689 0 0 0.0
2024 Q4 11,934 0 0 0.0
2024 Q3 14,083 1 0 71.0
2024 Q2 12,475 0 0 0.0
2024 Q1 13,003 0 0 0.0
Show 95 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 11,547 6 0 519.6
2023 Q3 13,076 0 0 0.0
2023 Q2 13,120 2 0 152.4
2023 Q1 15,446 0 0 0.0
2022 Q4 13,868 0 0 0.0
2022 Q3 15,716 0 0 0.0
2022 Q2 14,355 1 0 69.7
2022 Q1 12,969 1 0 77.1
2021 Q4 14,259 0 0 0.0
2021 Q3 12,117 1 0 82.5
2021 Q2 12,621 0 0 0.0
2021 Q1 10,367 0 0 0.0
2020 Q4 12,301 2 0 162.6
2020 Q3 11,717 1 0 85.3
2020 Q2 13,303 0 0 0.0
2020 Q1 11,110 1 0 90.0
2019 Q4 12,043 0 0 0.0
2019 Q3 12,598 0 0 0.0
2019 Q2 13,781 3 0 217.7
2019 Q1 13,093 3 0 229.1
2018 Q4 14,690 0 0 0.0
2018 Q3 13,435 0 0 0.0
2018 Q2 14,521 1 1 68.9
2018 Q1 13,569 0 0 0.0
2017 Q4 13,255 6 0 452.7
2017 Q3 12,742 0 0 0.0
2017 Q2 11,864 4 1 337.2
2017 Q1 10,114 0 0 0.0
2016 Q4 10,112 3 0 296.7
2016 Q3 9,136 0 0 0.0
2016 Q2 8,072 0 0 0.0
2016 Q1 7,955 2 0 251.4
2015 Q4 9,141 0 0 0.0
2015 Q3 8,843 0 0 0.0
2015 Q2 8,187 3 0 366.4
2015 Q1 8,002 0 0 0.0
2014 Q4 8,002 6 2 749.8
2014 Q3 9,163 0 0 0.0
2014 Q2 8,091 1 0 123.6
2014 Q1 8,739 0 0 0.0
2013 Q4 7,530 3 0 398.4
2013 Q3 8,591 0 0 0.0
2013 Q2 8,231 4 0 486.0
2013 Q1 8,497 0 0 0.0
2012 Q4 7,737 3 0 387.7
2012 Q3 8,301 2 0 240.9
2012 Q2 8,341 0 0 0.0
2012 Q1 8,530 2 0 234.5
2011 Q4 7,771 0 0 0.0
2011 Q3 8,597 2 0 232.6
2011 Q2 8,058 0 0 0.0
2011 Q1 6,960 3 1 431.0
2010 Q4 8,151 0 0 0.0
2010 Q3 7,484 4 0 534.5
2010 Q2 7,344 0 0 0.0
2010 Q1 5,890 4 0 679.1
2009 Q4 7,269 0 0 0.0
2009 Q3 7,386 2 1 270.8
2009 Q2 9,938 0 0 0.0
2009 Q1 10,713 0 0 0.0
2008 Q4 12,725 3 0 235.8
2008 Q3 12,624 0 0 0.0
2008 Q2 11,905 0 0 0.0
2008 Q1 10,580 0 0 0.0
2007 Q4 11,939 3 0 251.3
2007 Q3 12,978 0 0 0.0
2007 Q2 11,952 2 1 167.3
2007 Q1 14,442 0 0 0.0
2006 Q4 12,518 16 2 1278.2
2006 Q3 14,654 0 0 0.0
2006 Q2 13,483 1 1 74.2
2006 Q1 15,708 4 1 254.6
2005 Q4 13,818 0 0 0.0
2005 Q3 16,705 4 2 239.4
2005 Q2 19,550 0 0 0.0
2005 Q1 19,026 0 0 0.0
2004 Q4 21,058 2 1 95.0
2004 Q3 20,551 0 0 0.0
2004 Q2 20,083 0 0 0.0
2004 Q1 17,855 0 0 0.0
2003 Q4 19,982 1 1 50.0
2003 Q3 15,156 13 3 857.7
2003 Q2 20,316 1 0 49.2
2003 Q1 14,742 0 0 0.0
2002 Q3 19,026 1 0 52.6
2002 Q2 17,219 0 0 0.0
2002 Q1 17,612 0 0 0.0
2001 Q4 19,618 0 0 0.0
2001 Q3 16,328 6 3 367.5
2001 Q2 17,219 0 0 0.0
2001 Q1 13,424 0 0 0.0
2000 Q4 9,943 0 0 0.0
2000 Q3 2,248 0 0 0.0
2000 Q2 2,582 0 0 0.0
2000 Q1 1,929 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

30 on file

2026 · 2 incidents

May 21, 2026 AZ · Metal/Non-Metal bagging, package operator SLIP OR FALL OF PERSON
Omya Inc · Over-exertion (Not Elsewhere Classified)

Employee was on a safe rack when the flooring gave way. Employee did not fall all the way through and fall protection was in use. During the process of catching self the employee bruised the left arm and left leg.

January 28, 2026 AZ · Metal/Non-Metal bagging, package operator SLIP OR FALL OF PERSON
Omya Inc · Fall to the walkway or working surface

Employee fell from a chair roughly 56" inches from the ground. On impact, majority of body wait landed on the the left elbow causing a sprain.

2023 · 1 incident

October 6, 2023 AZ · Metal/Non-Metal belt foreman, maintenance foreman, maintenance supervisor ELECTRICAL
Omya Inc · Contact with electrical current

Maintenance supervisor was disconnecting an electric forklift battery power connection. Employee came in contact with battery frame and received shock on the right wrist. Electric shock ran through their upper body to left hand. Employee was transported to the ER for evaluation and was released.

2021 · 1 incident

June 4, 2021 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Omya Inc · Fall onto or against objects

Miner stacked pallets 20 high for use in packaging supersacks. When they reached for the top one a foot got caught under the pallet stack and when they went to step back was unable to. They fell back on to the roller conveyor and sustained a back contusion and sprain of ligaments of thoracic spine.

2019 · 2 incidents

July 1, 2019 AZ · Metal/Non-Metal bagging, package operator DISORDERS (PHYSICAL AGENTS)
Omya Inc · Contact with heat

Employee worked for about 30 mins packaging product in super sacks then started to clean for 60 minutes. EE felt light headed & went to get a drink of water. Went back to work. EE felt light headed still so EE stood in front of a fan. EE was then helped to the break room. EE felt overheated. The temperature outside was high of 100. EE had hiked the previous day. EE was dehydrated.

June 18, 2019 AZ · Metal/Non-Metal bagging, package operator OTHER
Omya Inc · Bodily reaction, (Not Elsewhere Classified)

During a bulk truck loading and packaging Temporary worker was kneeling on the top of the truck closing the truck hatch after finishing bulk load out. When the employee stood up EE felt a sharp pain in the right knee. Kneeling to close hatches and add seals is a normal practice. The temp worker was driven to the hospital and it was determined that EE had a right knee strain.

2016 · 1 incident

September 14, 2016 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Omya Inc · Struck by falling object

Employee was lifting a pallet to place it under a loading spout when ee lost grip causing the pallet to fall onto the left foot above the steel protector resulting in a bruise.

2014 · 1 incident

June 9, 2014 AZ · Metal/Non-Metal bagging, package operator HANDLING OF MATERIALS
Omya Inc · Struck by... (Not Elsewhere Classified)

Employee was pulling a vacuum hose when it got stuck between crossbeams. He yanked the hose which "slingshotted" towards him striking and chipping his front tooth.

2012 · 1 incident

December 11, 2012 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator OTHER
Omya Inc · Bodily reaction, (Not Elsewhere Classified)

Employee was sweeping the packaging/warehouse floor when he bent down to pick up an empty bay he felt a sharp pain in his back.

2007 · 1 incident

June 5, 2007 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Omya Arizona Inc · Fall from machine

Employee was on top of a bulk truck trailer trying to align a loading spout with the trailer opening, when he tripped and fell through the space between the bottom rail of the gangway and the trailer, landing on the ground.

2006 · 3 incidents

December 20, 2006 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Omya Arizona Inc · Over-exertion in lifting objects

Employee was lifting slipsheets when he felt sharp pain in his lower back.

October 16, 2006 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech STEPPING OR KNEELING ON OBJECT
Omya Arizona Inc · Struck against stationary object

Employee was removing 300.20.04 screw conveyor when he stepped on the edge of a section of floor grading that had been removed and placed on the floor.

May 9, 2006 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Omya Arizona Inc · Fall from machine

The employee was stepping down from the forklift, lost his footing, and injured his left hand and wrist falling to the ground. Employee is on restricted work duty.

2005 · 2 incidents

August 24, 2005 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Omya Arizona Inc · Over-exertion (Not Elsewhere Classified)

EMPLOYEE WAS STEPPING DOWN FROM THE DFA ROBOT PALLET DISCHARGE CONVEYOR AND TWISTED HIS LEFT ANKLE. THIS WAS AN UNAUTHORIZED WALKING ROUTE AND HE WILL BE RETRAINED. HE IS ON RESTRICTED WORK ACTIVITY

March 28, 2005 AZ · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Omya Arizona Inc · Absorption of radiations, caustics, toxic and noxious substances

EE WAS PERFORMING LAB TESTS. AFTER DIGESTION OF THE BONE MEAL SAMPLES, EE WAS RINSING THE LID OF THE VESSEL USING A 2:1 NITRIC ACID SOLUTION WITH A SQUIRT BOTTLE. THE BONE MEAL AND NITRIC ACID SPLASHED UP, CAUSING SEVERAL SMALL ACID BURN SPOTS ON HER FACE. THE BURNS WERE CLASSIFIED AS SECOND DEGREE BURNS.

2004 · 3 incidents

December 9, 2004 AZ · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Omya Arizona Inc · Struck against stationary object

Employee was attempting to lube throttle linkages with a can of WD40, when retracting his hand he came in contact with a fan blade. He cut his left palm area and the tip of his left thumb, requiring 17 stitches.

September 15, 2004 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Omya Arizona Inc · Struck by... (Not Elsewhere Classified)

EE WAS UNLOADING DRUMS FROM A PICKUP TO BE USED TO CATCH OIL BEING DRAINED FROM THE ROLLER MILL.AS HE SET THE DRUM DOWN, & TURNED IT, HE RECEIVED A 2CM LONG LACERATON TO HIS RIGHT THUMB

May 24, 2004 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Omya Arizona Inc · Over-exertion (Not Elsewhere Classified)

EE WAS SHOVELING CALCIUM CARBONATE INTO A HOPPER AND HE FELT A SHARP PAIN IN HIS LOWER BACK. EE WAS PLACED ON RESTRICTED WORK ACTIVITY.

2003 · 3 incidents

December 9, 2003 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Omya Arizona Inc · Over-exertion (Not Elsewhere Classified)

EE ALLEGES HE INJURED HIS BACK AT WORK WHILE WORKING ON A ROTARY ASSEMBLY. HE DID NOT REPORT THIS TO THE COMPANY UNTIL 12/16/03 AFTER HE WENT TO HIS OWN PHYSICIAN. CLAIM IS BEING QUESTIONED SINCE HE DID NOT REPORT UNTIL ONE WEEK LATER AND AFTER HE WENT HUNTING ON HIS OWN TIME. SEE ATTACHED NOTE. HE IS ON MODIFIED WORK.

July 17, 2003 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Omya Arizona Inc · Fall to the walkway or working surface

THE EE WAS USING CAUTION TAPE TO TAP OFF THE NORTH #1 BULK LOADOUT SCALE BECAUSE THE LOADOUT SPOUT WOULD NOT RETRACT. AS THE EE STEPPED OFF OF THE SCALE, HE STEPPED ON THE SCALE FOOTING CAUSIN G HIS FOOT TO ROLL SIDEWAYS AND HE FELL TO THE UGROUND. EE FRACTURED HIS FIBULA BUT BOTH THE INITIAL PHYSICIAN AND THE ORTHOPEDIC SPECALIST RETURNED HIM TO MODIFIED WORK. HE DID NOT LOSE ANY

January 23, 2003 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Omya Arizona Inc · Struck by... (Not Elsewhere Classified)

EMPLOYEE CLOCKED IN AND WAS CLEANING HIS POCKET KNIFE. HE ALLEGES HIS HAND SLIPPED AND HE LACERATED HIS RIGHT INDEX FINGER, WHICH REQUIRED 10 STITCHES. CLEANING HIS OWN PERSONAL POCKET KNIFE I S NOT ONE OF HIS ASSIGNED WORK DUTIES.

2002 · 3 incidents

October 18, 2002 AZ · Metal/Non-Metal welder (shop) HANDLING OF MATERIALS
Omya Arizona Inc · Caught in, under or between (Not Elsewhere Classified)

EE WAS UNFOLDING A LADDER AND PINCHED HIS THUMB BETWEEN TOP STEP AND RAIL.

June 12, 2002 AZ · Metal/Non-Metal welder (shop) HANDLING OF MATERIALS
Omya Arizona Inc · Struck by falling object

TWO EMPLOYEES WERE PLACING A WALK GRATE. ONE DROPPED HIS END SO THE OTHER EMPLOYEE'S END SLIPPED FROM HIS HAND AND ONTO HIS RIGHT INSTEP. INJURY WAS A CONTUSION.

May 16, 2002 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Omya Arizona Inc · Over-exertion (Not Elsewhere Classified)

EE WAS WALKING DOWN THE WEST STEPS TO THE BULK LOADOUT AREA AND TRIPPED. HE TWISTED HIS LEFT KNEE. EE WAS SEEN BY A PHYSICIAN AND PLACED ON MODIFIED WORK.

2001 · 4 incidents

July 19, 2001 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Omya Arizona Inc · Rubbed or abraded

EE'S LEFT KNEE BEGAN TO SWELL IN THE MIDDLE OF HIS SHIFT. HE ALLEGES IT WAS CAUSED BY KNEELING WHILE WORKING ON THE CRUSHER SYSTEM. IT IS QUESTIONABLE AS TO WHETHER OR NOT IT IS WORK RELATED B ECAUSE OF THE DIAGNOSIS.

June 14, 2001 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Omya Arizona Inc · Fall onto or against objects

THE EE WAS INSTALLING A MAGNET HOUSING. HE HAD THE MAGNET LAYING ON THE FLOOR WHERE HE WAS WORKING. HE STEPPED BACK ONTO THE MAGNET AND TWISTED HIS LEFT ANKLE.

May 2, 2001 AZ · Metal/Non-Metal carpenter HANDLING OF MATERIALS
Omya Arizona Inc · Struck by falling object

EE WAS TAKING INFORMATION FROM A CLASSIFIER MOTOR TAG PLATE WHEN DUST PARTICLES FELL FROM ABOVE.SOME OF THIS MATERIAL GOT INTO HIS LEFT EYE. A SMALL PIECE OF METAL BECAME INBEDDED IN HIS EYE.

January 3, 2001 AZ · Metal/Non-Metal weighman, scale person FALLING/SLIDING/ROLLING MATERIALS
Omya Arizona Inc · Struck by falling object

EE WAS WALKING INTO THE SPARE PART WAREHOUSE WHEN A METAL DOOR THAT WAS PROPPED UP FELL ON HER CAUSING HER TO FALL TO THE GROUND. EE WAS NOT SEEN BY A DOCTOR UNTIL 2 DAYS LATER.

2000 · 1 incident

December 16, 2000 AZ · Metal/Non-Metal miner, nec SLIP OR FALL OF PERSON
Omya Arizona Inc · Fall to the walkway or working surface

AFTER COMPLETING JANITORIAL DUTIES, CONTRACTOR WHITE GLOVE PRO CLEANING SVCS EE LOCKED THE DOORTO THE ADMIN BLD. SHE TURNED QUICKLY, STUBBED HER TOE & FELL TO THE GROUND ON HER RIGHT SIDE. FI RST AID WAS GIVEN UNTIL AMBULANCE ARRIVED. SHE WAS TRANSPORTED TO HOSPITAL FOR TESTS; SHE SUSTAINED 2 FRACTURED RIBS & FRACTURED STERNUM. TREATMENT CONSISTED OF MEDICATION ONLY.

1997 · 1 incident

April 1, 1997 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Mineral Development Inc · Caught in, under or between two or more moving objects

SCREEN CONVEYOR WAS LODGED. EE TRIED TO DISLODGE IT MANUALLY. HE TOLD CO-WORKER TO TURN CONVEYOR. CO-WORKER MISUNDERSTOOD, AND TURNED BELT ON, CAUSING EE'S LITTLE FINGER TO BE ROTATED BETWEEN BELT AND ROLLER, AND CAUSING CONTUSIONS ON ALL FINGERS OF RIGHT HAND.

For insurers, brokers, and safety consultants

The full compliance file on Omya Arizona

A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.