Mining Incidents

CoronaMetal/Nonmetal

Robertson's · Surface
Corona, Riverside County, CA · Active
MSHA Mine ID: 0405887
Fatalities
0
Total incidents
19
Years on record
2014–2025
Latest incident
Dec 2025
No fatalities recorded at this mine.

Reportable incidents

19 on file

2025 · 3 incidents

Over-exertion (Not Elsewhere Classified)

Miner was moving a haul truck wheel chock and felt pain in EE's left shoulder. EE missed no days of work but has now been put on restrictions from EE's Dr. that won't allow EE to perform EE's work duties and will be off work until further notice as of 1/20/2026.

Struck by... (Not Elsewhere Classified)

Miner struck thumb with a hammer while trying to unstick a valve.

Struck by falling object

Was working inside of crusher chute when a lodged piece of metal fell striking EE below EE's hardhat causing a cut.

2024 · 2 incidents

Struck by flying object

Miner was using a grinding tool, and a piece of metal hit miner's R-eye. Miner claims miner was wearing miner's prescription glasses and a face shield.

Struck against stationary object

Miner was moving a steel plate on a conveyor belt and cut their back on a pad eye welded to the tunnel roof.

2023 · 2 incidents

Flash burns (welding)

Miner was assisting with a maintenance project; welding was being performed and they sustained an eye irritation from residual arc flashing.

Struck by... (Not Elsewhere Classified)

Miner was doing a belt splice, was using a claw hammer for belt clips and hit L-middle finger with the hammer.

2022 · 1 incident

Caught in, under or between a moving and a stationary object

Miner was working on cone crusher retaining ring when EE's left ring finger got pinched between the retaining ring and the shaft.

2021 · 3 incidents

Struck by flying object

Hammering to remove a ripper arm pin on a D9 dozer, small metal shard struck EE's R-cheek.

Struck against stationary object

Stepped out of service truck and rolled ankle on a rock.

Struck by... (Not Elsewhere Classified)

Hit R-index finger with a sledge hammer

2020 · 3 incidents

Bodily reaction, (Not Elsewhere Classified)

Employee was merely walking to the primary Jaw when EE started to experience a 'sharp pain' in the left knee. EE didn't report until the next day.

Over-exertion (Not Elsewhere Classified)

Miner was descending down a ladder when a foot slipped while they had a grasp of the ladder with left hand. The resulting sudden pull dislocated the left shoulder.

Fall down stairs

While walking down a set of stairs the miner tripped over EE's own foot and fell stumbling down landing on EE's right knee on the stairs. Injuring the right knee causing a contusion to right knee.

2019 · 1 incident

Struck by flying object

Walking through the plant got debris in the left eye that irritates the eye

2017 · 2 incidents

Absorption of radiations, caustics, toxic and noxious substances

The employee was operating the sweeper when a bee crawled up their shirt sleeve and stung them in the arm. The sting resulted in swelling on their arm.

Flash burns (electric)

Miner was changing rotation on a motor. Did not properly Lock and Tag out the equipment. An arc flash occurred and the miner received 1st degree burns to hands and forearms.

2016 · 1 incident

Struck by falling object

The miner was locking the pins in on the skid steer for another miner. The injured miner locked the pins on the skid steer and stepped back. When the operator of the skid steer moved the bucket the bucket fell off causing a contusion of the left foot.

2014 · 1 incident

Over-exertion (Not Elsewhere Classified)

Working under normal conditions and stepped down awkwardly dislocating his knee.