Mining Incidents

Tri County Materials Inc. Metal/Non-Metal

Mesa, Graham County, AZ  ·  Active
MSHA Mine ID: 0200728

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Fatalities
0
Total incidents
5
Years on record
2006–2022
Latest incident
Jan 2022
Compliance record
MSHA citations since 2002
179
citations
41
significant & substantial
$77,123
proposed penalties
$66,832
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 4,400 0 0 0.0
2025 Q3 7,495 1 0 133.4
2025 Q2 7,244 0 0 0.0
2025 Q1 7,416 5 1 674.2
2024 Q4 7,237 0 0 0.0
2024 Q3 7,128 2 0 280.6
2024 Q2 7,305 0 0 0.0
2024 Q1 9,035 3 0 332.0
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.

Reportable incidents

5 on file

2022 · 1 incident

January 28, 2022 AZ · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Tri County Materials Inc · Struck against a moving object

On 1/28/22 a Ready mix concrete truck descended down a 10% grade mine road when the brakes of the truck became compromised. The driver lost control and the truck tipped over. IE was a passenger in training and suffered a broken leg in the accident.

2019 · 1 incident

April 2, 2019 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Tri County Materials Inc · Struck against stationary object

Working on replacing belts on crusher. A ratchet slipped off the bolt head, another bolt that had not been removed was sticking out below, employee's thumb struck it and severely lacerated below the nail.

2017 · 2 incidents

February 28, 2017 AZ · Metal/Non-Metal trespasser POWERED HAULAGE
Tri County Materials Inc · Struck against a moving object

On Feb 28 at about 6:30 the loader operator discovered a fatal vehicle accident on the south side of the mine pit. The vehicle crashed onto mine site from a public road.

February 23, 2017 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman OTHER
Tri County Materials Inc · Struck by falling object

Employee was helping change out troughing rollers on the crusher. One was standing on end, the wind gusted and blew it over onto employee's foot.

2006 · 1 incident

July 9, 2006 AZ · Metal/Non-Metal mechanic helper HANDTOOLS (NONPOWERED)
Tri County Materials Inc · Struck by... (Not Elsewhere Classified)

Employee states while holding tube while fellow employee hammered same with bowling pin, he was struck by pin.