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Pit #1 43rd Ave: 1 recorded fatality Metal/Non-Metal

Arizona Materials · Surface
Controlled by Summit Materials LLC
Maricopa, Maricopa County, AZ  ·  Active
MSHA Mine ID: 0202867

Pit #1 43rd Ave has $175K in proposed MSHA penalties and $61K outstanding across 16 contested dockets, plus health sampling and the full incident record.

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Fatalities
1
Total incidents
7
Years on record
2000–2026
Latest incident
Apr 2026
Compliance record
MSHA citations since 2000
310
citations
77
significant & substantial
$175,050
proposed penalties
$96,305
paid to date
55% of proposed penalties paid to date, a $78,745 gap.
Source: MSHA violations data, updated weekly.
See Arizona Materials's full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
84
inspections on record
1,323
inspection hours
23.4
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.
310 citations across 1,323 inspection hours.
Source: MSHA inspections data, updated weekly.

Pit #1 43rd Ave has $175K in proposed MSHA penalties and $61K outstanding across 16 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.
$175K
proposed penalties
$158K
current assessed
$96K
paid to date
$61K
outstanding
308 assessments are final orders; 16 contested dockets.
Of $96K in penalties contested before the Commission, $78K was upheld in final decisions.
As of the most recent assessment on 2026-03-13.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
ⓘ Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
25.0%
significant & substantial
3.2%
high negligence or reckless
29.2%
reasonably likely or greater
56.5%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 6.5% low, 90.3% moderate, 3.2% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
ⓘ Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
26 citations taken to the federal commission · 8% of citations on record
  • Settled 26 · 100%
59%
S&S designation survived the contest
ⓘ Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 17 decided S&S contests · industry: 79%
30%
Penalty reduction in decided contests
$16K proposed, $11K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2013-10-29.
Contested penalties
ⓘ A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
Docket Decision Judge Year Proposed / upheld
WEST20020387M Settlement Manning 2003 $70K → $60K
WEST 2012-343M Settlement Lesnick 2012 $7K → $5K
WEST20010302M Settlement Manning 2002 $5K → $3K
WEST 2014-53M Settlement Lesnick 2014 $4K → $2K
WEST 2010-626M Settlement Lesnick 2010 $3K → $2K
WEST 2013-834M Settlement Lesnick 2014 $2K → $1K
Source: FMSHRC civil penalty dockets and decisions (public record), updated weekly.
Health sampling
ⓘ A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.

Metal and nonmetal contaminants (personal samples)
ⓘ Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.

Last sampled: 2024-09-18
17%
of limit-tested samples over the exposure limit
20
samples
6
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz71 over
  • Respirable dust, <.1mg12
  • Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (20)
Date Contaminant Concentration Limit Conc / limit Occupation
2001-05-09 Quartz, respirable, >1% Qtz 1.47 0.65 2.26 Cleanup Man
2024-09-18 Respirable dust, <.1mg 0 Crusher Oper/Worker
2024-09-18 Respirable dust, <.1mg 0 Utility Man
2024-09-18 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-10-06 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-10-06 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-10-06 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-10-06 Quartz, respirable, >1% Qtz 0.13 Crusher Oper/Worker
2018-09-12 Respirable dust, <.1mg 0 Cleanup Man
2018-09-12 Respirable dust, <.1mg 0 Crusher Oper/Worker
2018-09-12 Respirable dust, <.1mg 0 Truck Driver
2009-05-20 Quartz, respirable, >1% Qtz 0.16 0.76 0.21 Truck Driver
2009-05-20 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-05-20 Quartz, respirable, >1% Qtz 0.15 1.36 0.11 Front-end Loader Operator
2009-05-20 Respirable dust, <.1mg 0 Crusher Oper/Worker
2003-02-20 Unlisted Particulate, respirable, <1% Qtz 0.17 Truck Driver
2003-02-20 Quartz, respirable, >1% Qtz 0.19 0.27 0.70 Crusher Oper/Worker
2003-02-20 Quartz, respirable, >1% Qtz 0.3 0.42 0.71 Crusher Oper/Worker
2003-02-20 Respirable dust, <.1mg 0 Crusher Oper/Worker
2001-05-09 Quartz, respirable, >1% Qtz 0.48 0.77 0.62 Hydrating Plant Operator
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.

Pit #1 43rd Ave recorded 3.91 reportable injury cases per 100 full-time workers in 2025.

Injury rate, 2025
ⓘ This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
3.91
total case rate
0.00
days-away rate
0.000
fatality rate
Above average. The US metal and nonmetal mining average was 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In Arizona, metal and nonmetal mining averaged 1.81 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year total case rate days-away fatal
2025 * 3.91 0.00 0.000
2024 * 0.00 0.00 0.000
2023 * 0.00 0.00 0.000
2022 * 0.00 0.00 0.000
2021 * 6.37 6.37 0.000
2020 * 0.00 0.00 0.000
2019 * 0.00 0.00 0.000
2018 * 0.00 0.00 0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Ownership history
  1. Rockland Materials 1999 to 2004
  2. Arizona Materials LLC 2004 to 2023
  3. Arizona Materials 2023 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 28
2025 17
2024 16
2023 13
2022 19
2021 21
2020 20
2019 17
2018 18
2017 17
2016 20
2015 19
2014 20
2013 18
2012 13
2011 10
2010 7
2009 10
2008 15
2007 16
2006 14
2005 13
2004 32
2003 13
2002 14
2001 16
2000 27
Source: MSHA quarterly employment and production, updated weekly.

Pit #1 43rd Ave sits in Maricopa County, Arizona, where the Census mining category is 0.2% of county employment.

Local economic context
ⓘ County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Maricopa County, Arizona · Population 4,491,987
0.2%
Mining share of county employment
$85,518
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
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
2026 Q2 14,900 0 0 0.0
2026 Q1 27,648 1 0 36.2
2025 Q4 16,627 0 0 0.0
2025 Q3 11,437 11 3 961.8
2025 Q2 11,749 0 0 0.0
2025 Q1 11,327 0 0 0.0
2024 Q4 11,235 3 2 267.0
2024 Q3 11,274 0 0 0.0
Show 96 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 13,180 0 0 0.0
2024 Q1 9,184 0 0 0.0
2023 Q4 8,815 1 0 113.4
2023 Q3 9,976 0 0 0.0
2023 Q2 2,293 0 0 0.0
2023 Q1 9,656 6 0 621.4
2022 Q4 4,330 0 0 0.0
2022 Q3 5,836 0 0 0.0
2022 Q2 5,917 1 1 169.0
2022 Q1 8,688 0 0 0.0
2021 Q4 6,501 2 0 307.6
2021 Q3 7,489 0 0 0.0
2021 Q2 8,219 1 0 121.7
2021 Q1 9,209 0 0 0.0
2020 Q4 8,350 1 0 119.8
2020 Q3 11,534 5 1 433.5
2020 Q2 8,387 0 0 0.0
2020 Q1 8,632 7 2 810.9
2019 Q4 7,265 0 0 0.0
2019 Q3 6,235 2 0 320.8
2019 Q2 5,786 0 0 0.0
2019 Q1 7,508 4 2 532.8
2018 Q4 6,783 0 0 0.0
2018 Q3 7,325 12 6 1638.2
2018 Q2 6,253 0 0 0.0
2018 Q1 7,335 1 1 136.3
2017 Q4 6,488 0 0 0.0
2017 Q3 6,784 4 0 589.6
2017 Q2 7,412 0 0 0.0
2017 Q1 6,753 9 1 1332.7
2016 Q4 6,545 0 0 0.0
2016 Q3 6,780 4 1 590.0
2016 Q2 7,066 0 0 0.0
2016 Q1 7,442 0 0 0.0
2015 Q4 6,327 10 0 1580.5
2015 Q3 5,571 0 0 0.0
2015 Q2 7,876 6 1 761.8
2015 Q1 6,172 1 0 162.0
2014 Q4 7,181 0 0 0.0
2014 Q3 7,781 6 2 771.1
2014 Q2 7,656 0 0 0.0
2014 Q1 6,702 12 6 1790.5
2013 Q4 5,786 0 0 0.0
2013 Q3 7,529 12 5 1593.8
2013 Q2 5,877 0 0 0.0
2013 Q1 5,730 6 2 1047.1
2012 Q4 5,743 0 0 0.0
2012 Q3 3,826 6 1 1568.2
2012 Q2 3,368 0 0 0.0
2012 Q1 3,456 7 1 2025.5
2011 Q4 3,652 0 0 0.0
2011 Q3 3,003 18 3 5994.0
2011 Q2 1,968 0 0 0.0
2011 Q1 1,933 9 4 4656.0
2010 Q4 2,132 0 0 0.0
2010 Q3 1,897 4 1 2108.6
2010 Q2 1,765 0 0 0.0
2010 Q1 1,495 0 0 0.0
2009 Q4 2,986 5 1 1674.5
2009 Q3 2,826 0 0 0.0
2009 Q2 2,770 5 2 1805.1
2009 Q1 2,807 0 0 0.0
2008 Q4 3,362 5 0 1487.2
2008 Q3 4,706 0 0 0.0
2008 Q2 5,836 6 0 1028.1
2008 Q1 7,538 5 0 663.3
2007 Q4 6,738 0 0 0.0
2007 Q3 5,380 6 2 1115.2
2007 Q2 6,946 0 0 0.0
2007 Q1 7,414 6 1 809.3
2006 Q4 6,624 0 0 0.0
2006 Q3 8,382 9 1 1073.7
2006 Q2 7,005 0 0 0.0
2006 Q1 6,711 0 0 0.0
2005 Q4 12,726 14 0 1100.1
2005 Q3 8,140 0 0 0.0
2005 Q2 5,442 0 0 0.0
2005 Q1 4,498 0 0 0.0
2004 Q4 5,287 0 0 0.0
2004 Q3 5,455 3 1 550.0
2004 Q2 3,592 0 0 0.0
2004 Q1 16,133 0 0 0.0
2003 Q4 6,167 0 0 0.0
2003 Q3 7,241 0 0 0.0
2003 Q2 6,306 0 0 0.0
2003 Q1 4,723 8 3 1693.8
2002 Q4 5,942 0 0 0.0
2002 Q3 8,613 4 1 464.4
2002 Q2 8,298 0 0 0.0
2002 Q1 8,684 8 3 921.2
2001 Q4 8,986 0 0 0.0
2001 Q3 11,989 0 0 0.0
2001 Q2 13,854 8 2 577.5
2001 Q1 11,667 0 0 0.0
2000 Q4 15,359 19 7 1237.1
2000 Q3 25,975 3 2 115.5

Fatalities at this mine

1 recorded
July 21, 2000 AZ · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator Fatality · EXPLODING VESSELS UNDER PRESSURE
Rockland Materials · Contact with hot objects or substances

THE INJURED EMPLOYEE WAS REMOVING EXCESS AMTERIAL AT THE STOCK PILE AREA WITH A FRONT END LOADER. HE STRUCK A NATURAL GAS LINE CAUSING IT TO ERUPT INTO FLAMES CAUSING SERIOUS INJURIES. THE P IPELINE WAS UNEXPECTEDLY AT A VERY SHALLOW DEPTH, AND THE VICTIM INADVERTENTLY DUG BELOW THE SURFACE LEVEL. THE ACCIDENT DID NOT INVOLVE ANY COMPLIANCE ISSUES, MINER SKILLS, ATTITUDE, OR TRAI

Reportable incidents

6 on file (excluding fatalities above)

2026 · 2 incidents

April 13, 2026 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Arizona Materials · Struck by... (Not Elsewhere Classified)

EE was changing screens at the washplant and was cutting a piece of rubber using a utility knife. During the cutting motion the knife slipped past the rubber and stabbed the EEs thumb.

March 31, 2026 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Arizona Materials · Over-exertion (Not Elsewhere Classified)

While cleaning in the wash plant tunnel, employee slipped on aggregate material on the floor and hurt EE's knee. EE requested to be evaluated at the occupational clinic where they prescribed restrictions along with medication for the knee injury.

2025 · 1 incident

January 14, 2025 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Arizona Materials · Struck against a moving object

EE was using water truck to wet down area when loader operator who was back dragging roads backed into the water truck EE's chest struck the steering wheel. EE has some strained muscles in chest.

2021 · 1 incident

December 17, 2021 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Arizona Materials LLC · Fall to the walkway or working surface

The miner lost consciousness for an unknown health related reason and fell injuring EE's back.

2014 · 1 incident

February 19, 2014 AZ · Metal/Non-Metal building repair man, maintenance SLIP OR FALL OF PERSON
Arizona Materials LLC · Fall from ladders

Fall from the 3rd rung on a 6 foot ladder. Ladder was placed on an uneven surface and had an improper hinge repair.

2013 · 1 incident

June 4, 2013 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Arizona Materials LLC · Fall to lower level, (Not Elsewhere Classified)

Just got done replacing a screen and went to step down onto the catwalk (approx 1ft step down) and fell onto the catwalk. Diagnosis is contusion of right elbow, and back strain. He was released for regular duty for 6/5/2013, had checkup 6/6/2013 and was put on light duty.