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.
1024 San Tan Valley Metal/Non-Metal
Arcosa Aggregates West, LLC
· Surface
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 file2025 · 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
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.