Mining Incidents

MISSION GORGE PLANT Metal/Non-Metal

Controlled by Vulcan Materials Company
San Diego, San Diego County, CA  ·  Active
MSHA Mine ID: 0400089

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Fatalities
0
Total incidents
19
Years on record
2000–2023
Latest incident
Jun 2023
Compliance record
MSHA citations since 2000
383
citations
109
significant & substantial
$219,385
proposed penalties
$209,091
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 9,765 0 0 0.0
2025 Q3 12,258 0 0 0.0
2025 Q2 13,407 12 1 895.1
2025 Q1 14,846 0 0 0.0
2024 Q4 14,458 6 2 415.0
2024 Q3 14,665 0 0 0.0
2024 Q2 18,106 3 0 165.7
2024 Q1 14,017 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

19 on file

2023 · 2 incidents

June 28, 2023 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech DISORDERS (REPEATED TRAUMA)
Superior Ready Mix Concrete L P · (Not Elsewhere Classified)

Through an industrial audiogram exam, it was determined the employee sustained reportable hearing loss due to industrial noise exposure

June 27, 2023 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer DISORDERS (REPEATED TRAUMA)
Superior Ready Mix Concrete L P · (Not Elsewhere Classified)

Through an industrial audiogram exam, it was determined the employee sustained reportable hearing loss due to industrial noise exposure.

2022 · 1 incident

February 2, 2022 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Superior Ready Mix Concrete L P · Fall from machine

Worker was sitting on the side step of the loader waiting for fuel when worker slipped off and injured shoulder.

2020 · 3 incidents

December 14, 2020 CA · Metal/Non-Metal outside foreman, leadman DISORDERS (REPEATED TRAUMA)
Superior Ready Mix Concrete L P · (Not Elsewhere Classified)

Audiogram revealed hearing loss from prior test.

December 14, 2020 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman DISORDERS (REPEATED TRAUMA)
Superior Ready Mix Concrete L P · (Not Elsewhere Classified)

Audiogram revealed hearing loss from prior test.

May 1, 2020 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Superior Ready Mix Concrete L P · Struck by... (Not Elsewhere Classified)

Employees were changing 8'x 24'screen. The counter weight was being heated and employee stepped forward to give instruction when the counter weight came loose and struck employee in the right leg.

2019 · 1 incident

June 21, 2019 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Superior Ready Mix Concrete L P · Over-exertion in wielding or throwing objects

Employee was drilling a hole in conveyor belts to be used on a screen. The drill bit bound up while drilling and caused the drill to twist suddenly injuring the employee's wrist. Employee did not report the injury until 07/16/2019.

2014 · 2 incidents

October 30, 2014 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Superior Ready Mix Concrete L P · Fall from machine

Employee missed the last step getting down of the loader and fell back hitting his head on the ground.

August 21, 2014 CA · Metal/Non-Metal EXPLOSIVES AND BREAKING AGENTS
Superior Ready Mix Concrete L P · Accident type, without injuries

A scheduled blast at the quarry sent clay material north into the air damaging two homes. A hole was made in a garage wall in one home & a window broke in a second home. It appears that a clay seam occurred in the rock to be blasted. The clay seam went undetected. The blast blew out the side of the wall because of the presence of the clay sea, sending particles into the air.

2013 · 1 incident

September 3, 2013 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Superior Ready Mix Concrete L P · Over-exertion (Not Elsewhere Classified)

Employee was cleaning C#5 belt of 2 inch minuses rock when he twisted his lower back.

2011 · 1 incident

August 22, 2011 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Superior Ready Mix Concrete L P · Over-exertion (Not Elsewhere Classified)

Employee strained his back due to being bent over while welding.

2008 · 1 incident

June 11, 2008 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech EXPLODING VESSELS UNDER PRESSURE
Superior Ready Mix Concrete L P · Struck by... (Not Elsewhere Classified)

Pressure had not been released from line, employee was loosening four bolts on hydraulic line when oil under high pressure sprayed him in both eyes and forehead.

2005 · 1 incident

July 18, 2005 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Superior Ready Mix Concrete L P · Fall from machine

Employee was working on a screen chute, he slipped and fell landing with his arm extended and dislocated his left shoulder.

2004 · 2 incidents

September 25, 2004 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Superior Ready Mix Concrete L P · Unclassified, insufficient data

Employee put a second ear plug in same ear, causing the first plug to be jammed in ear. He also complained of heel pain from standing too long

July 13, 2004 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Superior Ready Mix Concrete L P · Contact with hot objects or substances

Worker was cutton on an uneven surface, he slipped and the torch crossed over his gloved hand and as a result he received a burn to his hand.

2003 · 1 incident

February 17, 2003 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Superior Ready Mix Concrete L P · Over-exertion (Not Elsewhere Classified)

OPERATING HAMMER DRILL, DRILLING ON A CONCRETE CULBERT, EE WAS IN A SIDE WAYS POSITION WHEN HE FELT A SHARP PAIN IN HIS RIGHT GROIN AREA AS WELLAS HIS BACK ON THE RIGHT SIDE.

2001 · 2 incidents

December 26, 2001 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Superior Ready Mix Concrete L P · Struck by... (Not Elsewhere Classified)

WHILE TRYING TO LOOSEN ROCK FROM PULLY, HE INJURED HIS LEFT 5TH FINGER CUTTING THE FINGER AND NAIL.

December 7, 2001 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Superior Ready Mix Concrete L P · Struck by flying object

OPERATOR HAS A BUNGY CORD ATTACHED TO CB RADIO MIKE TO KEEP IT FROM SWINGING INSIDE CAB OF LOADER. WHEN HE PULLED THE CORD TO TALK IT CAME LOOSE AND STRUCK HIM IN THE FACE BREAKING HIS GLASSES AND GETTING GLASS IN HIS EYE.

2000 · 1 incident

May 16, 2000 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Superior Ready Mix Concrete L P · Caught in, under or between (Not Elsewhere Classified)

SMASHED BIG TOE BETWEEN ROTOR AND CHUTE OF TORGESON.