Mining Incidents

Corona Metal/Non-Metal

Robertson's · Surface
Corona, Riverside County, CA  ·  Active
MSHA Mine ID: 0405887

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Fatalities
0
Total incidents
20
Years on record
2014–2026
Latest incident
May 2026
Compliance record
MSHA citations since 2014
42
citations
13
significant & substantial
$8,222
proposed penalties
$8,222
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 10,578 1 0 94.5
2025 Q3 710 0 0 0.0
2024 Q4 717 0 0 0.0
2024 Q3 661 1 0 1512.9
2024 Q1 10,197 0 0 0.0
2023 Q3 503 0 0 0.0
2023 Q2 383 0 0 0.0
2023 Q1 14,153 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

20 on file

2026 · 1 incident

May 14, 2026 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Robertson's · Struck by powered moving object

Miner was conducting EE's plant walk facing the sand screw, which is a noisy area due to the shaker decks above, EE stated EE heard the skid steer operating, but when EE turned to EE's left to see where it was the skid steer knocked EE off EE's feet and into the bucket, causing shin and elbow injuries.

2025 · 3 incidents

December 30, 2025 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Robertson's · 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.

July 22, 2025 CA · Metal/Non-Metal outside foreman, leadman HANDTOOLS (NONPOWERED)
Robertson's · Struck by... (Not Elsewhere Classified)

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

January 15, 2025 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Robertson's · 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

September 30, 2024 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Robertson's · 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.

June 22, 2024 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech STRIKING OR BUMPING
Robertson's · 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

December 18, 2023 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Robertson's · Flash burns (welding)

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

March 27, 2023 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Robertson's · 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

October 17, 2022 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Robertson's · 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

August 12, 2021 CA · Metal/Non-Metal drill operator HANDTOOLS (NONPOWERED)
Robertson's · Struck by flying object

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

May 25, 2021 CA · Metal/Non-Metal driller, highwall operator, highwall drill operator STEPPING OR KNEELING ON OBJECT
Robertson's · Struck against stationary object

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

April 21, 2021 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Robertson's · Struck by... (Not Elsewhere Classified)

Hit R-index finger with a sledge hammer

2020 · 3 incidents

July 1, 2020 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Robertson's · 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.

March 18, 2020 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Robertson's · 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.

March 3, 2020 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Robertson's · 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

May 25, 2019 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Robertson's · Struck by flying object

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

2017 · 2 incidents

September 15, 2017 CA · Metal/Non-Metal sweeper operator OTHER
Robertson's · 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.

July 25, 2017 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech ELECTRICAL
Robertson's · 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

January 12, 2016 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Robertson's · 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

July 23, 2014 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Robertson's · Over-exertion (Not Elsewhere Classified)

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