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1050 Estrella Pit: 125 MSHA citations Metal/Non-Metal

Controlled by Arcosa, Inc
Buckeye, Apache County, AZ  ·  Active
MSHA Mine ID: 0202372

1050 Estrella Pit has $27K in proposed MSHA penalties and $13K outstanding across 4 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
2
Years on record
1992–2025
Latest incident
Jun 2025
Compliance record
MSHA citations since 2004
125
citations
38
significant & substantial
$27,188
proposed penalties
$14,388
paid to date
53% of proposed penalties paid to date, a $12,800 gap.
Source: MSHA violations data, updated weekly.
See Arcosa Aggregates West, LLC.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2002
47
inspections on record
647
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: 647 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

1050 Estrella Pit has $27K in proposed MSHA penalties and $13K outstanding across 4 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.
$27K
proposed penalties
$27K
current assessed
$14K
paid to date
$13K
outstanding
106 assessments are final orders; 4 contested dockets.
Of $2K in penalties contested before the Commission, $1K was upheld in final decisions.
As of the most recent assessment on 2026-06-01.
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.
31.7%
significant & substantial
5.0%
high negligence or reckless
31.7%
reasonably likely or greater
60.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 5.0% low, 90.0% moderate, 5.0% 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.
9 citations taken to the federal commission · 7% of citations on record
  • Settled 5 · 56%
  • Stood as issued 1 · 11%
  • Vacated or withdrawn 3 · 33%
60%
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 5 decided S&S contests · industry: 79%
36%
Penalty reduction in decided contests
$2K proposed, $1K 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 2025-01-06.
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
WEST 2025-0130 Settlement Simonton 2025 $1K → $721
WEST 2017-0576 Settlement Miller 2017 $160 → $160
WEST 2014-0907 Dismissal Manning 2014 $127 → $127
WEST 2014-0934 Withdrawal Manning 2014 $100 → $0
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: 2026-02-10
25%
of limit-tested samples over the exposure limit
19
samples
12
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz123 over
  • Respirable dust, <.1mg6
  • Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (19)
Date Contaminant Concentration Limit Conc / limit Occupation
2024-09-10 Quartz, respirable, >1% Qtz 2.19 0.55 3.98 Crusher Oper/Worker
2024-09-10 Quartz, respirable, >1% Qtz 1.89 0.54 3.50 Laborer, Bullgang
2017-04-26 Quartz, respirable, >1% Qtz 0.78 0.54 1.44 Laborer, Bullgang
2026-02-10 Respirable dust, <.1mg 0 Front-end Loader Operator
2026-02-10 Quartz, respirable, >1% Qtz 0.29 0.46 0.63 Crusher Oper/Worker
2024-10-17 Quartz, respirable, >1% Qtz 0.24 0.61 0.39 Crusher Oper/Worker
2024-10-17 Quartz, respirable, >1% Qtz 0.16 0.67 0.24 Laborer, Bullgang
2024-09-10 Quartz, respirable, >1% Qtz 0.43 0.55 0.78 Welder, etc.
2024-09-10 Quartz, respirable, >1% Qtz 0.45 0.81 0.56 Crusher Oper/Worker
2018-05-30 Respirable dust, <.1mg 0 Truck Driver
2018-05-30 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-05-30 Unlisted Particulate, respirable, <1% Qtz 0.29 Crusher Oper/Worker
2017-06-07 Quartz, respirable, >1% Qtz 0.31 1.16 0.27 Laborer, Bullgang
2017-04-26 Respirable dust, <.1mg 0 Laborer, Bullgang
2017-04-26 Respirable dust, <.1mg 0 Front-end Loader Operator
2014-05-14 Respirable dust, <.1mg 0 Front-end Loader Operator
2005-07-20 Quartz, respirable, >1% Qtz 0.23 0.43 0.53 Crusher Oper/Worker
2005-07-20 Quartz, respirable, >1% Qtz 0.22 0.94 0.23 Front-end Loader Operator
2005-07-20 Quartz, respirable, >1% Qtz 0.18 0.49 0.37 Laborer, Bullgang
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.

1050 Estrella Pit recorded 3.30 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.
3.30
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.
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. Day and Sons LLC 1987 to 2005
  2. White Mountain Rock Products, LLC 2005 to 2014
  3. Southwest Rock Products LLC 2014 to 2021
  4. White Mountain Properties 2021 to 2024
  5. Arcosa Aggregates West, LLC. 2024 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 22
2025 22
2024 24
2021 3
2020 3
2019 3
2018 3
2017 3
2016 3
2015 3
2014 4
2013 2
2012 3
2011 1
2010 2
2009 1
2008 3
2007 4
2006 7
2005 7
2004 3
2003 2
2002 3
2001 2
2000 3
Source: MSHA quarterly employment and production, updated weekly.

1050 Estrella Pit sits in Apache County, Arizona, where the Census mining category is 0.7% 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.
Apache County, Arizona · Population 65,680
0.7%
Mining share of county employment
$40,338
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 13,095 5 1 381.8
2026 Q1 12,613 3 0 237.8
2025 Q4 13,082 0 0 0.0
2025 Q3 15,529 4 1 257.6
2025 Q2 16,308 0 0 0.0
2025 Q1 15,623 0 0 0.0
2024 Q4 14,752 0 0 0.0
2024 Q3 17,158 19 2 1107.4
Show 85 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2021 Q4 615 0 0 0.0
2021 Q3 1,250 0 0 0.0
2021 Q2 1,676 0 0 0.0
2021 Q1 437 0 0 0.0
2020 Q4 1,569 0 0 0.0
2020 Q3 1,967 0 0 0.0
2020 Q2 1,639 1 0 610.1
2020 Q1 1,436 0 0 0.0
2019 Q4 1,443 0 0 0.0
2019 Q3 1,292 0 0 0.0
2018 Q4 1,028 0 0 0.0
2018 Q3 1,509 0 0 0.0
2018 Q2 2,764 0 0 0.0
2018 Q1 1,130 0 0 0.0
2017 Q4 1,378 0 0 0.0
2017 Q3 1,106 0 0 0.0
2017 Q2 2,551 1 1 392.0
2017 Q1 1,381 0 0 0.0
2016 Q4 1,488 0 0 0.0
2016 Q3 1,777 0 0 0.0
2016 Q2 1,472 0 0 0.0
2016 Q1 1,049 0 0 0.0
2015 Q4 2,127 0 0 0.0
2015 Q3 1,511 0 0 0.0
2015 Q2 1,230 0 0 0.0
2015 Q1 1,133 0 0 0.0
2014 Q4 813 0 0 0.0
2014 Q3 1,512 0 0 0.0
2014 Q2 1,339 1 1 746.8
2014 Q1 1,253 0 0 0.0
2013 Q4 1,157 0 0 0.0
2013 Q3 1,391 0 0 0.0
2013 Q2 1,306 0 0 0.0
2013 Q1 0 0 0
2012 Q4 1,260 0 0 0.0
2012 Q3 1,220 0 0 0.0
2012 Q2 2,263 3 1 1325.7
2012 Q1 1,345 0 0 0.0
2011 Q4 0 0 0
2011 Q3 507 6 1 11834.3
2011 Q2 600 0 0 0.0
2011 Q1 959 0 0 0.0
2010 Q4 567 0 0 0.0
2010 Q3 2,669 3 3 1124.0
2010 Q2 248 0 0 0.0
2010 Q1 544 0 0 0.0
2009 Q4 496 0 0 0.0
2009 Q3 400 0 0 0.0
2009 Q2 60 1 0 16666.7
2009 Q1 277 2 0 7220.2
2008 Q4 340 0 0 0.0
2008 Q3 1,482 0 0 0.0
2008 Q2 1,232 6 1 4870.1
2008 Q1 1,460 3 1 2054.8
2007 Q4 1,859 0 0 0.0
2007 Q3 2,340 2 1 854.7
2007 Q2 828 0 0 0.0
2007 Q1 2,563 1 0 390.2
2006 Q4 3,228 0 0 0.0
2006 Q3 3,596 6 0 1668.5
2006 Q2 1,772 0 0 0.0
2006 Q1 2,940 6 3 2040.8
2005 Q4 3,093 9 4 2909.8
2005 Q3 6,147 26 11 4229.7
2005 Q2 2,400 0 0 0.0
2005 Q1 2,000 0 0 0.0
2004 Q4 1,800 0 0 0.0
2004 Q3 2,400 0 0 0.0
2004 Q2 1,080 9 6 8333.3
2004 Q1 1,800 0 0 0.0
2003 Q4 1,560 0 0 0.0
2003 Q3 1,188 0 0 0.0
2003 Q2 960 0 0 0.0
2003 Q1 0 0 0
2002 Q4 1,648 0 0 0.0
2002 Q3 2,717 0 0 0.0
2002 Q2 0 0 0
2001 Q4 0 0 0
2001 Q3 0 0 0
2001 Q2 542 0 0 0.0
2001 Q1 1,073 0 0 0.0
2000 Q4 977 0 0 0.0
2000 Q3 1,169 0 0 0.0
2000 Q2 1,281 0 0 0.0
2000 Q1 650 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

2 on file

2025 · 1 incident

June 5, 2025 AZ · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDTOOLS (NONPOWERED)
Arcosa Aggregates West, LLC. · Struck by flying object

The employee was working with another employee replacing a conveyor roller. The injured employee was holding the roller as another employee was taping it in place with a 3-pound hammer. The injured employee moved their hand, and it was struck by the hammer.

1992 · 1 incident

July 2, 1992 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Day and Sons LLC · Caught in, under or between a moving and a stationary object

LIFTING ROCK BUMPED ANOTHER ROCK.MASHED END OF FINGER BETWEEN THE 2 ROCKS.