Mining Incidents

1024 San Tan Valley Metal/Non-Metal

Controlled by Arcosa, Inc
San Tan Valley, Pinal County, AZ  ·  Intermittent
MSHA Mine ID: 0203493

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Fatalities
0
Total incidents
3
Years on record
2025
Latest incident
Oct 2025
Compliance record
MSHA citations since 2024
6
citations
2
significant & substantial
$1,346
proposed penalties
$1,346
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 7,901 3 2 379.7
2025 Q2 1,260 0 0 0.0
2024 Q4 8,089 0 0 0.0
2024 Q3 9,924 1 0 100.8
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.

Reportable incidents

3 on file

2025 · 3 incidents

October 2, 2025 AZ · Metal/Non-Metal crusher attendant/operator, pan feeder operator/worker SLIP OR FALL OF PERSON
Arcosa Aggregates West, LLC · Fall from machine

The employee was descending the ladder from the top deck of the cone when a hand slipped approximately midway down, causing them to fall to the deck below. Reported to management 10/30 when diagnosed with a hernia.

August 4, 2025 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Arcosa Aggregates West, LLC · Caught in, under or between a moving and a stationary object

Employees thumb was pinched between stand and component while adjusting stand. Fracture and laceration to thumb.

May 5, 2025 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Arcosa Aggregates West, LLC · Struck by flying object

The employee had removed the pin on the tooth and was tapping it with a small sledgehammer on top to dislodge it from the shank. In the process of striking the tooth, a fragment of metal splintered off the tooth, striking the employee in the thigh.