Mining Incidents

1014 EAGLE MOUNTAIN QUARRY Metal/Non-Metal

Controlled by Arcosa, Inc
San Tan Valley, Maricopa County, AZ  ·  Active
MSHA Mine ID: 0203146

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Fatalities
0
Total incidents
3
Years on record
2016–2020
Latest incident
Dec 2020
Compliance record
MSHA citations since 2008
50
citations
16
significant & substantial
$6,850
proposed penalties
$6,451
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 4,570 0 0 0.0
2025 Q3 4,395 0 0 0.0
2025 Q1 3,631 0 0 0.0
2024 Q4 4,720 3 0 635.6
2024 Q3 1,082 1 0 924.2
2024 Q2 3,166 0 0 0.0
2023 Q4 1,034 0 0 0.0
2023 Q1 720 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

3 on file

2020 · 1 incident

December 2, 2020 AZ · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator MACHINERY
Southwest Rock Products · Rubbed or abraded

Employee was changing segments on the loader bucket. Employee placed hand to catch a bolt, but the bolt caught the impact wrench, spun in place and cut the hand.

2017 · 1 incident

July 3, 2017 AZ · Metal/Non-Metal crusher attendant/operator, pan feeder operator/worker OTHER
Southwest Rock Products · (Not Elsewhere Classified)

EE and supervisor were adjusting the scale on the system. EE was watching the belt and supervisor turned to adjust the scale. When supervisor turned back a minute later, EE was on the ground clutching EE's chest. Another EE stayed with the victim while supervisor guided the police, fire department and ambulance to the victim.

2016 · 1 incident

November 7, 2016 AZ · Metal/Non-Metal crusher attendant/operator, pan feeder operator/worker MACHINERY
Southwest Rock Products · Struck by falling object

The employee was running a track-mounted crushing machine. A rock the size of a cell-phone fell from the top of the feed hopper as the employee was looking up and the rock hit EE's mouth, cracking a tooth, and causing some swelling.