Mining Incidents

Plant 1 Avondale Metal/Non-Metal

Arizona Materials · Surface
Controlled by Summit Materials LLC
Tolleson, Maricopa County, AZ  ·  Active
MSHA Mine ID: 0203390

Plant 1 Avondale has $9K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
1
Years on record
2026
Latest incident
Jan 2026
Compliance record
MSHA citations since 2017
47
citations
21
significant & substantial
$8,855
proposed penalties
$8,855
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2017
23
inspections on record
256
inspection hours
n/a
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.
Rate withheld: 256 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Plant 1 Avondale has $9K in proposed MSHA penalties and $0 outstanding across 0 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.
$9K
proposed penalties
$9K
current assessed
$9K
paid to date
$0
outstanding
47 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-03-09.
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 4,580 0 0 0.0
2025 Q3 3,906 0 0 0.0
2025 Q2 5,142 0 0 0.0
2025 Q1 5,396 0 0 0.0
2024 Q4 4,890 1 0 204.5
2024 Q3 5,187 1 0 192.8
2024 Q2 6,434 0 0 0.0
2024 Q1 1,756 0 0 0.0
Show 25 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 8,585 0 0 0.0
2023 Q3 8,231 0 0 0.0
2023 Q2 7,714 0 0 0.0
2023 Q1 6,959 2 0 287.4
2022 Q4 6,829 0 0 0.0
2022 Q3 6,897 1 0 145.0
2022 Q2 5,998 0 0 0.0
2022 Q1 4,528 0 0 0.0
2021 Q4 9,049 0 0 0.0
2021 Q3 7,254 13 11 1792.1
2021 Q2 6,437 0 0 0.0
2021 Q1 6,523 0 0 0.0
2020 Q4 7,430 0 0 0.0
2020 Q3 7,417 4 1 539.3
2020 Q2 7,570 0 0 0.0
2020 Q1 6,545 0 0 0.0
2019 Q4 6,677 0 0 0.0
2019 Q3 8,086 0 0 0.0
2019 Q2 11,502 6 3 521.6
2019 Q1 8,894 0 0 0.0
2018 Q4 9,032 0 0 0.0
2018 Q3 9,720 0 0 0.0
2018 Q2 8,308 0 0 0.0
2018 Q1 5,460 0 0 0.0
2017 Q4 3,863 6 4 1553.2
No fatalities recorded at this mine.

Reportable incidents

1 on file

2026 · 1 incident

January 9, 2026 AZ · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Arizona Materials · Over-exertion (Not Elsewhere Classified)

While employee was cleaning under the wash plant with a mini skid steer EE backed into the H beam which forced EE's arm and wrist into the boom lift lever which injured the employees wrist.

For insurers, brokers, and safety consultants

The full compliance file on Plant 1 Avondale

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.