Mining Incidents

Rialto Metal/Non-Metal

Robertson's · Surface
Rialto, San Bernardino County, CA  ·  Active
MSHA Mine ID: 0405392

Rialto has $73K in proposed MSHA penalties and $0 outstanding across 2 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
14
Years on record
2002–2025
Latest incident
Oct 2025
Compliance record
MSHA citations since 2000
210
citations
49
significant & substantial
$73,063
proposed penalties
$70,635
paid to date
97% of proposed penalties paid to date, a $2,428 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
79
inspections on record
1,549
inspection hours
13.6
citations per 100 inspection hours
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
210 citations across 1,549 inspection hours.
Source: MSHA inspections data, updated weekly.

Rialto has $73K in proposed MSHA penalties and $0 outstanding across 2 contested dockets.

Penalty disposition
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$73K
proposed penalties
$71K
current assessed
$71K
paid to date
$0
outstanding
209 assessments are final orders; 2 contested dockets.
As of the most recent assessment on 2025-09-08.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Quarterly safety rates
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2025 Q4 10,488 0 0 0.0
2025 Q3 10,972 1 0 91.1
2025 Q2 10,451 0 0 0.0
2025 Q1 7,956 1 1 125.7
2024 Q4 9,710 0 0 0.0
2024 Q3 10,605 0 0 0.0
2024 Q2 9,976 0 0 0.0
2024 Q1 8,329 0 0 0.0
Show 96 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 10,664 0 0 0.0
2023 Q3 11,415 1 0 87.6
2023 Q2 11,241 0 0 0.0
2023 Q1 9,780 0 0 0.0
2022 Q4 10,868 0 0 0.0
2022 Q3 11,712 0 0 0.0
2022 Q2 11,675 0 0 0.0
2022 Q1 13,256 0 0 0.0
2021 Q4 12,869 2 0 155.4
2021 Q3 14,088 2 0 142.0
2021 Q2 13,953 0 0 0.0
2021 Q1 12,481 0 0 0.0
2020 Q4 12,682 3 1 236.6
2020 Q3 13,943 0 0 0.0
2020 Q2 13,888 2 0 144.0
2020 Q1 14,812 0 0 0.0
2019 Q4 13,189 3 1 227.5
2019 Q3 13,047 0 0 0.0
2019 Q2 13,685 2 0 146.1
2019 Q1 12,061 0 0 0.0
2018 Q4 13,534 3 0 221.7
2018 Q3 13,097 0 0 0.0
2018 Q2 12,721 2 0 157.2
2018 Q1 13,837 1 1 72.3
2017 Q4 17,353 0 0 0.0
2017 Q3 17,456 1 0 57.3
2017 Q2 16,323 0 0 0.0
2017 Q1 16,023 1 0 62.4
2016 Q4 14,946 0 0 0.0
2016 Q3 17,620 5 2 283.8
2016 Q2 35,667 1 1 28.0
2016 Q1 43,078 0 0 0.0
2015 Q4 34,163 10 3 292.7
2015 Q3 21,105 1 0 47.4
2015 Q2 19,091 0 0 0.0
2015 Q1 19,053 0 0 0.0
2014 Q4 14,956 2 1 133.7
2014 Q3 15,132 1 0 66.1
2014 Q2 16,063 0 0 0.0
2014 Q1 15,395 0 0 0.0
2013 Q4 16,614 0 0 0.0
2013 Q3 19,046 0 0 0.0
2013 Q2 19,152 2 1 104.4
2013 Q1 18,881 0 0 0.0
2012 Q4 17,736 3 0 169.1
2012 Q3 18,086 0 0 0.0
2012 Q2 20,486 1 0 48.8
2012 Q1 19,486 0 0 0.0
2011 Q4 18,488 2 0 108.2
2011 Q3 19,719 0 0 0.0
2011 Q2 18,546 2 0 107.8
2011 Q1 18,631 0 0 0.0
2010 Q4 17,264 8 3 463.4
2010 Q3 17,865 0 0 0.0
2010 Q2 16,635 2 0 120.2
2010 Q1 16,161 0 0 0.0
2009 Q4 14,767 5 1 338.6
2009 Q3 14,806 0 0 0.0
2009 Q2 14,794 9 3 608.4
2009 Q1 16,743 0 0 0.0
2008 Q4 23,615 6 1 254.1
2008 Q3 19,226 0 0 0.0
2008 Q2 25,040 6 2 239.6
2008 Q1 23,109 0 0 0.0
2007 Q4 34,330 5 1 145.6
2007 Q3 27,868 3 0 107.7
2007 Q2 26,306 11 1 418.2
2007 Q1 24,911 0 0 0.0
2006 Q4 23,422 0 0 0.0
2006 Q3 23,504 9 3 382.9
2006 Q2 29,232 0 0 0.0
2006 Q1 18,974 8 0 421.6
2005 Q4 27,824 3 3 107.8
2005 Q3 36,183 10 2 276.4
2005 Q2 22,339 1 0 44.8
2005 Q1 20,305 0 0 0.0
2004 Q4 17,002 0 0 0.0
2004 Q3 19,798 7 2 353.6
2004 Q2 15,140 3 0 198.2
2004 Q1 19,944 5 0 250.7
2003 Q4 18,879 0 0 0.0
2003 Q3 21,164 0 0 0.0
2003 Q2 17,429 4 3 229.5
2003 Q1 36,881 1 1 27.1
2002 Q4 34,922 3 1 85.9
2002 Q3 33,644 7 0 208.1
2002 Q2 32,457 0 0 0.0
2002 Q1 30,579 14 2 457.8
2001 Q4 29,456 0 0 0.0
2001 Q3 27,673 3 0 108.4
2001 Q2 28,036 0 0 0.0
2001 Q1 26,320 0 0 0.0
2000 Q4 22,933 6 2 261.6
2000 Q3 20,896 0 0 0.0
2000 Q2 19,832 0 0 0.0
2000 Q1 16,203 16 6 987.5
No fatalities recorded at this mine.

Reportable incidents

14 on file

2025 · 1 incident

October 17, 2025 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman STRIKING OR BUMPING
Robertson's · Struck against stationary object

Miner bumped EE's head on equipment frame exiting a skid steer. Miner was wearing a hardhat.

2019 · 1 incident

December 23, 2019 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Robertson's · Over-exertion (Not Elsewhere Classified)

Miner was descending down the stairs of 992 front end loader when they slipped on steps slid down 2 steps but remained upright never falling. The steps were wet from the rain and the miner strained their left lower back.

2018 · 1 incident

April 18, 2018 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Robertson's · Fall onto or against objects

Removing troughing roller, slipped & struck hand on ladder.

2016 · 1 incident

July 12, 2016 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Robertson's · Over-exertion (Not Elsewhere Classified)

Miner has re-aggravated prior injury from 12-28-15

2015 · 2 incidents

December 28, 2015 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Robertson's · Over-exertion in wielding or throwing objects

Miner was shoveling a deck hit when the shovel hit an uneven surface causing his right arm to be pushed back. Miner has right forearm and elbow strain.

November 2, 2015 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Robertson's · Struck against a moving object

The haul road was slick due to rain. The haul truck lost control and rolled over on right side. The operator was knocked out for 2 to 3 minutes at time of incident. After further exam at clinic is right wrist was sprained.

2011 · 1 incident

June 23, 2011 CA · Metal/Non-Metal beltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor rider SLIP OR FALL OF PERSON
Robertson's · Fall from scaffolds, walkways, platforms

Employee failed to follow Company procedures for safe access when entering belt press area. Employee removed a removable catwalk (only used when replacing the gear box is necessary. The gear box is lowered through the opening using a crane) and proceeded to climb down framework to catwalk 5 ft below. While climbing down, employee slipped and fell approx 3 feet.

2009 · 1 incident

May 11, 2009 CA · Metal/Non-Metal beltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor rider EXPLOSIVES AND BREAKING AGENTS
Robertson's · Struck by flying object

Injury was standing approximately 6' from a 400 horsepower motor to a cone crusher when a mechanical failure caused the fan to come apart inside the fan housing which in turn exploded and one of the many pieces of the fan assembly struck him in his right leg 6" above his ankle thus breaking his leg

2007 · 1 incident

November 27, 2007 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Robertson's · Struck by... (Not Elsewhere Classified)

While pulling wire through a conduit pipe on a 500' run with a p/u truck, the rope we used to pull the electrical wire with was tied in a square knot around a 6" C-clamp which was attached through one of the loops on the trailer hitch assembly. The clamp twisted off the hitch assembly & hit the employee above the right knee on the side of his leg leaving a very small cut.

2006 · 1 incident

July 13, 2006 CA · Metal/Non-Metal beltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor rider HANDLING OF MATERIALS
Robertson's · Caught in, under or between a moving and a stationary object

EE was removing a return roller and when he rolled it out of the bracket he got his middle finger on his left hand slightly smashed between the roller and the roller bracket. We weren't even aware he went to the clinic until he turned paperwork in 3 weeks later.

2005 · 1 incident

December 14, 2005 CA · Metal/Non-Metal beltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor rider SLIP OR FALL OF PERSON
Robertson's · Fall from machine

The employee was working with another EE off a man-lift without a safety harness. The man-lift needed to be moved & he elected to stay on the belt without being strapped in, and at some point got impatient & he took it upon himself to walk down the belt leading to the belt press and lost his balance and falling approximately 16' breaking a bone above his right ankle.

2003 · 1 incident

February 14, 2003 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Robertson's · Struck against a moving object

EE HAD BEEN WORKING ON A PIECE OF EQUIPMENT WHEN HE WAS DONE HE DROVE AROUND THE EQUIPMENT ONTO THE HAUL ROAD WITHOUT LOOKING AND WAS HIT BY THE HAUL TRUCK.

2002 · 2 incidents

April 29, 2002 CA · Metal/Non-Metal water truck operator SLIP OR FALL OF PERSON
Robertson's · Fall to the walkway or working surface

Employee was hosing around the Thickner when he slipped and fell, hurting his shoulder.

March 23, 2002 CA · Metal/Non-Metal truck driver SLIP OR FALL OF PERSON
Robertson's · Fall to the walkway or working surface

EMPLOYEE WAS WALKING TO THE THICKER AREA WHEN HESLIPPED AND FELL ON A SLOPE STRAINING HIS ELBOW.

For insurers, brokers, and safety consultants

The full compliance file on Rialto

A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.