Mining Incidents

Azusa Rock Metal/Non-Metal

Azusa Rock, LLC · Surface
Controlled by Vulcan Materials Company
irwindale, Los Angeles County, CA  ·  Active
MSHA Mine ID: 0404674

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Fatalities
0
Total incidents
8
Years on record
2000–2026
Latest incident
May 2026
Compliance record
MSHA citations since 2002
55
citations
9
significant & substantial
$38,967
proposed penalties
$25,514
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 9,187 0 0 0.0
2025 Q3 9,644 0 0 0.0
2025 Q2 9,931 0 0 0.0
2025 Q1 9,167 2 1 218.2
2024 Q4 8,159 0 0 0.0
2024 Q3 8,079 0 0 0.0
2024 Q2 8,804 2 0 227.2
2024 Q1 7,397 1 1 135.2
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.

Reportable incidents

8 on file

2026 · 1 incident

May 1, 2026 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Azusa Rock, LLC · Struck against a moving object

Haul truck operator was involved in a tip-over incident while moving material, resulting in the truck overturning onto the driver's side. Following the incident, the employee received a medical evaluation after beginning to experience blurred vision and nausea. The employee was diagnosed with a neck muscle strain and a lumbar muscle strain.

2023 · 1 incident

March 26, 2023 CA · Metal/Non-Metal miner, prospector, nec HANDLING OF MATERIALS
CalMat Co · Over-exertion (Not Elsewhere Classified)

On 03/06/2023 employee was retrieving a tear plate when they felt a strain to right shoulder. On 03/27/2023 employee notified management of the incident and requested medical evaluation, employee was placed on modified duty and prescribed work restrictions for a right shoulder strain.

2018 · 1 incident

July 16, 2018 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
CalMat Co · Struck against a moving object

Employee was attempting to back up a 6,000 gallon articulating water truck, when the right rear tire went up a 2.5% grade causing the truck and cab to tip over.

2014 · 2 incidents

July 10, 2014 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
CalMat Co · Struck by... (Not Elsewhere Classified)

Employee was changing cutting bits on a piece of equipment. He was using an 8 lb hammer to release the retaining pin. A metal fragment chipped off the pin and struck his low abdomen. He was taken to a clinic and the fragment was partially removed. The remaining portion was left in place due to doctor's recommendation.

July 8, 2014 CA · Metal/Non-Metal greaser, grease man, oiler, lube man, dragline oiler SLIP OR FALL OF PERSON
CalMat Co · Over-exertion (Not Elsewhere Classified)

Employee was working to fuel equipment. As the employee climbed down off a D10 dozer he stepped to the ground. Upon releasing from the ladder he felt low back pain. The employee was diagnosed with a muscle strain at a local clinic. The employee was released to modified duty.

2002 · 1 incident

October 10, 2002 CA · Metal/Non-Metal welder (shop) SLIP OR FALL OF PERSON
CalMat Co · Over-exertion (Not Elsewhere Classified)

EE WENT TO SEE CO. DR. ON 10/10/02 AND WAS PLACED ON RESTRICTED DUTY. WHEN CLIMBING OUT OF LOADER, EE STEPPED ON TONGUE OF LOADER BUCKET WHICH HAS A 2"LIP, HIS ANKLE TURNED & RESULTED IN A SPRAINED RT. ANKLE.

2001 · 1 incident

August 17, 2001 CA · Metal/Non-Metal welder (shop) HANDLING OF MATERIALS
CalMat Co · Contact with hot objects or substances

EE WENT TO SEE A DR ON 8-21-01 AND WAS TAKEN OFF WORK. WHEN EE STOOD UP FROM WELDING, HE BACKED INTO A PIECE OF HOT ANGLE IRON WITH HIS L ELBOW.

2000 · 1 incident

August 16, 2000 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech DISORDERS (REPEATED TRAUMA)
CalMat Co · Over-exertion (Not Elsewhere Classified)

EMPLOYEE WENT TO SEE THE DOCTOR ON 8-16-00 AND WA PLACED ON RESTRICTED DUTY. EMPLOYEE CLAIMS THAT HIS HANDS STARTED HURTING HIM SOME TIME IN MARCH 2000, BUT NEVER REPORTED IT UNTIL 8-16-00. EM PLOYEE ALLEGES CARPAL TUNNEL SYNDROME DUE TO JOBDUTIES LIKE WRENCHING, SHOVELING, STEERING.