Mining Incidents

Irwindale Aggregates Metal/Non-Metal

Irwindale, Los Angeles County, CA  ·  Active
MSHA Mine ID: 0401838

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Fatalities
0
Total incidents
59
Years on record
2000–2025
Latest incident
Oct 2025
Compliance record
MSHA citations since 2000
230
citations
41
significant & substantial
$71,063
proposed penalties
$64,921
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 18,933 0 0 0.0
2025 Q3 3,120 1 0 320.5
2025 Q1 24,994 1 0 40.0
2024 Q3 4,860 0 0 0.0
2024 Q2 28,839 0 0 0.0
2024 Q1 29,461 0 0 0.0
2023 Q2 22,610 0 0 0.0
2023 Q1 10,212 1 0 97.9
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.

Reportable incidents

59 on file

2025 · 1 incident

2024 · 2 incidents

2022 · 1 incident

2020 · 2 incidents

February 5, 2020 CA · Metal/Non-Metal utility man, shift tech, service/dump truck operator HANDLING OF MATERIALS
Martin Marietta Southern California Aggregates,LLC · Caught in, under or between a moving and a stationary object

Employee was relocating a storage locker from an employee breakroom to the maintenance shop. Upon doing so, the employees left hand was caught between the locker and a heavy duty shop table causing a contusion.

2019 · 1 incident

2018 · 2 incidents

July 31, 2018 CA · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in pulling or pushing objects

Employee was pulling a pin out of the ground and felt a pain in their lower back while doing so. On August 3rd, the employee made a determination that the continued pain warranted being evaluated by a doctor. The visit to the doctor occurred on 8/3/2018.

June 8, 2018 CA · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

Employee reported lower back pain a week after using a 5 gallon bucket to transfer liquid from a spill to a poly tote.

2017 · 6 incidents

October 16, 2017 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Hanson Aggregates Pacific Southwest Inc · Fall to the walkway or working surface

Pulling debris from import loads employee stepped backward and lost footing. Employee used left hand/arm to stop fall resulting in a wrist fracture.

September 22, 2017 CA · Metal/Non-Metal mine manager, mine foreman, mine owner OTHER
Hanson Aggregates Pacific Southwest Inc · Absorption of radiations, caustics, toxic and noxious substances

Employee was guiding an equipment operator relocating the weight and guy wire for a telephone pole. The pole cracked and bees flew out stinging the employee multiple times.

May 23, 2017 CA · Metal/Non-Metal barge/boat/dredge/towbarge/towboat/leach operator, riverman, deck hand STRIKING OR BUMPING
Hanson Aggregates Pacific Southwest Inc · Struck against stationary object

During the pre shift inspection on the Dredge EE hit the (top) back side of their hand and EE does not recall what they hit their hand on but does recall while inspecting a dewatering screen they hit their hand on something. At the time they did not notice anything but about a hour later they noticed their hand bleeding.

May 1, 2017 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Hanson Aggregates Pacific Southwest Inc · Struck by flying object

Employee was preparing a rear bumper on service truck #7 to weld on by grinding with an air grinder and the grinding wheel came apart and struck employee's abdomen cutting open employee's stomach.

February 22, 2017 CA · Metal/Non-Metal utility man, shift tech, service/dump truck operator HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in pulling or pushing objects

EE was climbing into screen #701 to replace skirt rubber that deflects rock at the end of screen. While entering the screen EE had to push existing skirt. While pushing EE heard a "pop" in their back but did not feel pain so continued & completed the task. In the next morning while getting up EE's back was sore & EE notified supervisor (mill foreman).

2016 · 6 incidents

October 8, 2016 CA · Metal/Non-Metal utility man, shift tech, service/dump truck operator HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

EE was shoveling in P-9 tunnel and felt a little pain in right shoulder on Saturday and thought nothing of it. That night EE woke to considerably a lot more pain and the next morning EE notified supervisor. On Monday the 10th EE requested to go to the clinic and EE was provided that.

August 22, 2016 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Hanson Aggregates Pacific Southwest Inc · Caught in, under or between a moving and a stationary object

EE was assisting with removal of the front hubs on the 988F front end loader. While they were attempting to place the hub on shop floor with use of overhead crane, EE had placed a lifting strap around hub & to the crane hook, EE was trying to force the hub to set down level & right hand middle finger became pinched between strap & a 90 oil fitting on the hub.

May 19, 2016 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer MACHINERY
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

While assembling a 12-inch pipe, using an excavator as a crane, the pipe moved bumping EE in the right thigh. EE was taken to the clinic and diagnosed with a bruised right hip and strain of right thigh. Physical therapy was recommended. This was treated as a first aid until 6/15/2016 when the clinic requested that the EE see a doctor for continued pain.

March 31, 2016 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

The part being worked on was not adequately blocked to prevent movement. The people who performed the hazard analysis did not believe the part would or could move. EE leg was broken above the ankle and will undergo surgery to repair.

March 30, 2016 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

Employee suffered a strained back when EE attempted to lift and move a return roller.

2015 · 3 incidents

August 23, 2015 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver EXPLODING VESSELS UNDER PRESSURE
Hanson Aggregates Pacific Southwest Inc · Struck against a moving object

A miner suffered from neck strain when the bed of his haul truck came down suddenly. The bed's hydraulic ram hose ruptured as it was descending causing it to fall. He was given OTC meds and restricted work.

June 23, 2015 CA · Metal/Non-Metal utility man, shift tech, service/dump truck operator HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

After work a miner noticed he had a bump below his abdominal area. He noted that he had been shoveling material that day for a long period of time. He reported it 2 days later after noticing the bump became larger. He did not have pain but wanted to report it anyway. He was sent to the Industrial clinic after he reported it to management.

March 28, 2015 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Hanson Aggregates Pacific Southwest Inc · Struck against a moving object

Loader operator was injured while driving loader on uneven grad the loader rocked from side to side and his right leg below the hip hit the metal bar support to the arm rest inside the loader. "This incident was just viewed as a first aid until a drain was applied to the bruise to aid in healing of the bruise."

2014 · 3 incidents

August 7, 2014 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

Employee was using a pneumatic chipping hammer with a chisel head to aid in the removal of an axle on a water truck. The chisel dislodged from the hammer and struck the employee on the upper lip. Sutures closed the laceration.

May 28, 2014 CA · Metal/Non-Metal barge/boat/dredge/towbarge/towboat/leach operator, riverman, deck hand SLIP OR FALL OF PERSON
Hanson Aggregates Pacific Southwest Inc · Over-exertion (Not Elsewhere Classified)

Employee suffered a left knee strain as he descended the top of an earthen berm. As he turned to walk down the berm, his right foot slipped on loose material, twisting his left knee. He was provided prescription meds and a knee brace.

May 21, 2014 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Hanson Aggregates Pacific Southwest Inc · Fall onto or against objects

Employee received a hypertextension injury to his left thumb while clearing spilled material adjacent to a shaker screen. The employee was using a shovel to clear rocks that had spilled from the 711 screen onto the work deck. His foot slipped on a rock causing him to slip and fall which resulted in the shovel handle jam into his left thumb.

2013 · 2 incidents

October 20, 2013 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Caught in, under or between a moving and a stationary object

Injured employee suffered a smashing injury to tip of his right forefinger. Employee was engaged in removing the cab from an old Terex haul truck by cutting it away with a torch. As he finished cutting the truck's frame, the cab settled, nipping the end of his right forefinger. The injury resulted in a laceration requiring sutures to close.

March 4, 2013 CA · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant NONPOWERED HAULAGE
Hanson Aggregates Pacific Southwest Inc · Struck against stationary object

Lab tech was maneuvering a wheelbarrow filled with wet aggregate by backing through a doorway when his right forearm struck the door frame, resulting in a laceration requiring sutures to close.

2012 · 1 incident

February 8, 2012 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

Employee was removing ram cylinder from 773D. Chain hoist was attached to cylinder with nylon strap at center of ram. When employee pulled on the lower clevis with his hands, the ram came free and swung towards fuel tank smashing his hand in between resulting in pressure cut to middle finger requiring stitches.

2009 · 1 incident

January 29, 2009 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

Employee was drilling a welding lug connected to a 6" piece of cable and a quick connect. The drill press's bit caught the lug and pulled the cable into the drill as well as his hand that was holding the cable. He was correctly not wearing any gloves while operating the press. He was not using the equipment supplied clamping device.

2008 · 4 incidents

October 23, 2008 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

Employee was on p-8 stacker to perform a belt splice. While securing the tail of the belt to the splicing board the employee struck his right thumb with a hammer.

March 21, 2008 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

Employee was cleaning a walkway next to Feeder 306. Suddenly a pocket of wet material pushed through the feeder with no warning, stricking the employee on the left knee.

February 29, 2008 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Hanson Aggregates Pacific Southwest Inc · Bodily reaction, (Not Elsewhere Classified)

The employee felt/heard a popping sound in his right knee after rising from a sitting position from working on the brakes of a water truck.

2007 · 4 incidents

September 15, 2007 CA · Metal/Non-Metal barge/boat/dredge/towbarge/towboat/leach operator, riverman, deck hand HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Caught in, under or between (Not Elsewhere Classified)

While putting a ladder away, the employee half-opened the ladder with his fingers inside the folding hinge intended to lock down the ladders open position. The employee picked up the ladder with his finger caught in the pinch point.

August 20, 2007 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Hanson Aggregates Pacific Southwest Inc · Fall onto or against objects

While welding grizzly bars on the dredge the employee lost his footing falling into a sitting position and striking his left elbow on one of the bars.

March 27, 2007 CA · Metal/Non-Metal beltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor rider HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion (Not Elsewhere Classified)

While shoveling at the 520 conveyor belt the employee felt low back pain.

January 20, 2007 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Hanson Aggregates Pacific Southwest Inc · Struck by falling object

Employee was cutting steel from loading box when he was struck by the 15" by 50" plate.

2006 · 8 incidents

October 7, 2006 CA · Metal/Non-Metal barge/boat/dredge/towbarge/towboat/leach operator, riverman, deck hand HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Caught in, under or between a moving and a stationary object

The employee was clearing out a head-box with a long bar when his left hand became caught between the bar and a piece of angle stock inside the box.

October 2, 2006 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

While loading rake teeth into the back of a pick-up truck, the employee injured his lower back.

June 9, 2006 CA · Metal/Non-Metal barge/boat/dredge/towbarge/towboat/leach operator, riverman, deck hand OTHER
Hanson Aggregates Pacific Southwest Inc · Bodily reaction, (Not Elsewhere Classified)

While walking the water conveyor line, the employee's knee felt like it slipped out of joint.

February 17, 2006 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

While changing a hydraulic pump, the employee and a coworker were lifting a small junction cable box to tie it into position. Muscle strain to lower back. Injury was initially minor in nature; on 2/24/06 physical therapy was requested, making the injury reportable to MSHA.

January 25, 2006 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

While replacing a lip on a shaker with the assistance of a co-worker, the employee strained his right shoulder muscle.

January 11, 2006 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

While cutting flag cable for a water conveyor extension with a short handled four pound sledge hammer, the hammer missed the correct contact. It instead struck the employee on the webbing of the left hand between the forefinger and thumb.

2005 · 2 incidents

December 12, 2005 CA · Metal/Non-Metal water truck operator HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

The employee was using a utility knife to open a package of padlocks for his work locker. He bended his knee and used the upper thigh as a wooden block for cutting purposes. The utility knife slipped and sliced open the left leg, upper thigh.

December 9, 2005 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Hanson Aggregates Pacific Southwest Inc · Fall to lower level, (Not Elsewhere Classified)

The employee was moving from one smaller container to a larger container while carrying a box. When leaving through the door he misjudged the height of the ground to the container. He slipped and fell to the ground.

2004 · 5 incidents

December 1, 2004 CA · Metal/Non-Metal crane operator, mobile equipment operator (meo), dragline operator, dropball operator, rigger HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

The employee was cleaning screens. While lifting one of the screens he felt a pop in the arch of his left foot.

July 2, 2004 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion (Not Elsewhere Classified)

The employee was driving his private vehicle when he began to experience extreme pain in his abdomen area. Hernia was determined to be work related on 8/13/04.

May 21, 2004 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

The employee was cutting a piece of conveyor belting. While doing so, his right hand slipped causing the razor knife he was holding to strike his left thumb.

May 7, 2004 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

The employee was repairing the underflow pump at the clarifer. During the job, the employee bent down to pick up a small piece of the pump and felt a sharp pain in his low back.

May 7, 2004 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Struck by falling object

The employee was removing a broken troughing can from the 543 Conveyor. As he handed one of the cans up to his partner for removal from the area, the can broke in half and fell on the employee's left hand.

2003 · 2 incidents

November 30, 2003 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Struck against stationary object

The employee was tightening the conveyor belt on F1 conveyor. Employee hit is left hand fingers between a ratchet handle and conveyor frame.

November 30, 2003 CA · Metal/Non-Metal miner, nec HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Caught in, under or between (Not Elsewhere Classified)

EE WAS REPAIRING A BROKEN HYDRAULIC HOSE ON THE LOWER PORTION OF DREDGE CLAMSHELL BUCKET RAM. HE WRAPPED A CHAIN COME-ALONG AROUND THE SHAFT OF THE RAM TO MOVE THE RAM BACK FOR ACCESS TO THE HOSE FITTINGS. AFTER TENSION WAS APPLIED TO THE COME-ALONG, THE EE REACHED BEHIND THE RAM TO REMOVE THE BROKEN HOSE & THE HOSE FITTING. THE CHAIN ATTACHED TO THE RAM SLIPPED & ARM WAS CAUGHT.

2000 · 3 incidents

October 9, 2000 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech RESPIRATORY CONDITIONS (TOXIC AGENTS)
Hanson Aggregates Pacific Southwest Inc · Inhalation of radiations, caustics, toxic and noxious substances

REPAIR TRUCK HAD AN ELECTRICAL FIRE UNDER THE HOOD. THE EE, WITH THE ASSISTANCE OF ANOTHER EE, ATTEMPTED TO DOUSE THE FIRE. EE HAD TO GET CLOSE TO THE FLAME, SMOKE AND FIRE EXTINGUISHER CHEMIC AL IN ORDER TO PUT OUT THE FIRE.

July 27, 2000 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

PORT SIDE RAKE MOVED TO STARBOARD SIDE, BUMPED STARBOARD SIDE RAKE & CUT EE'S ANKLE BREAKING HIS LEG

January 27, 2000 CA · Metal/Non-Metal electrician, lineman ELECTRICAL
Hanson Aggregates Pacific Southwest Inc · Contact with electrical current

INJURED EE WAS ATTEMPTING TO CONNECT AN AMP METER COUNTED ON AN ELECTRICAL CABINET. ALTHOUGH STILL UNDER INVESTIGATION, IT APPEARS THAT ELECTRICITY ARCED TOWARDS HIS RIGHT ARM. THE ELECTRICITY , (4160 VOLTS) SOUGHT GROUND TO THE CABINET, MISSING HIS ARM. HE RECEOVE AN ELECTRICAL SHOCK THROUGH CONTACT WITH THE CABINET.