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Minnetonka Pit: 130 MSHA citations Metal/Non-Metal

Dyna Rock LLC · Surface
Mesa, Navajo County, AZ  ·  Intermittent
MSHA Mine ID: 0202894

Minnetonka Pit has $92K in proposed MSHA penalties and $0 outstanding across 5 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
1
Years on record
2003
Latest incident
Feb 2003
Compliance record
MSHA citations since 2001
130
citations
38
significant & substantial
$91,557
proposed penalties
$79,247
paid to date
87% of proposed penalties paid to date, a $12,310 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
56
inspections on record
692
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: 692 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Minnetonka Pit has $92K in proposed MSHA penalties and $0 outstanding across 5 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.
$92K
proposed penalties
$79K
current assessed
$79K
paid to date
$0
outstanding
129 assessments are final orders; 5 contested dockets.
Of $60K in penalties contested before the Commission, $47K was upheld in final decisions.
As of the most recent assessment on 2023-11-01.
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.
29.5%
significant & substantial
2.3%
high negligence or reckless
29.5%
reasonably likely or greater
62.8%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 7.0% low, 90.7% moderate, 2.3% 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.
31 citations taken to the federal commission · 24% of citations on record
  • Settled 28 · 90%
  • Vacated or withdrawn 3 · 10%
69%
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 13 decided S&S contests · industry: 79%
21%
Penalty reduction in decided contests
$60K proposed, $47K 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 2012-03-20.
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 2012-623M Settlement Lesnick 2013 $31K → $26K
WEST 2011-563M Settlement Lewis 2011 $25K → $18K
WEST 2012-666M Settlement Lesnick 2013 $2K → $2K
WEST 2006-112M Settlement Feldman 2006 $2K → $2K
WEST 2012-118M Settlement Lesnick 2012 $100 → $100
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: 2025-11-05
0%
of limit-tested samples over the exposure limit
6
samples
1
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg4
  • Quartz, respirable, >1% Qtz2
Show the individual readings (6)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-11-05 Respirable dust, <.1mg 0 Front-end Loader Operator
2025-11-05 Quartz, respirable, >1% Qtz 0.14 Crusher Oper/Worker
2021-05-04 Quartz, respirable, >1% Qtz 0.61 0.71 0.86 Crusher Oper/Worker
2021-05-04 Respirable dust, <.1mg 0 Front-end Loader Operator
2012-01-04 Respirable dust, <.1mg 0 Front-end Loader Operator
2012-01-04 Respirable dust, <.1mg 0 Crusher Oper/Worker

Area samples (mill and shop air)

Last sampled: 2014-05-14, 12 years ago
1
samples
Show the individual readings (1)
Date Contaminant Concentration Limit Conc / limit Area sampled
2014-05-14 Respirable dust, <.1mg 0 MP CRUSHING
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.
Ownership history
  1. Dyna Rock & Sand Inc. 2000 to 2024
  2. Dyna Rock LLC 2024 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 4
2025 4
2024 4
2023 5
2022 4
2021 4
2020 4
2019 4
2018 4
2017 5
2016 4
2015 4
2014 4
2013 3
2012 5
2011 3
2010 4
2009 5
2008 5
2007 5
2006 5
2005 4
2004 4
2003 4
2002 3
2001 2
2000 2
Source: MSHA quarterly employment and production, updated weekly.

Minnetonka Pit sits in Navajo County, Arizona, where the Census mining category is 0.8% 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.
Navajo County, Arizona · Population 107,744
0.8%
Mining share of county employment
$52,752
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 1,166 0 0 0.0
2026 Q1 806 0 0 0.0
2025 Q4 763 0 0 0.0
2025 Q3 999 0 0 0.0
2025 Q2 598 0 0 0.0
2025 Q1 263 0 0 0.0
2024 Q4 401 0 0 0.0
2024 Q3 590 0 0 0.0
Show 95 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 736 0 0 0.0
2024 Q1 493 0 0 0.0
2023 Q4 559 1 1 1788.9
2023 Q3 848 4 0 4717.0
2023 Q2 1,234 0 0 0.0
2023 Q1 1,235 0 0 0.0
2022 Q4 1,118 0 0 0.0
2022 Q3 1,216 1 0 822.4
2022 Q2 748 0 0 0.0
2022 Q1 771 1 1 1297.0
2021 Q4 395 0 0 0.0
2021 Q3 422 0 0 0.0
2021 Q2 592 0 0 0.0
2021 Q1 674 0 0 0.0
2020 Q4 685 0 0 0.0
2020 Q3 748 0 0 0.0
2020 Q2 845 2 0 2366.9
2020 Q1 592 1 0 1689.2
2019 Q4 458 0 0 0.0
2019 Q3 864 0 0 0.0
2019 Q2 607 1 0 1647.4
2019 Q1 635 0 0 0.0
2018 Q4 603 0 0 0.0
2018 Q3 486 1 1 2057.6
2018 Q2 667 0 0 0.0
2018 Q1 934 3 0 3212.0
2017 Q4 687 0 0 0.0
2017 Q3 1,178 0 0 0.0
2017 Q2 1,369 3 0 2191.4
2017 Q1 1,076 1 0 929.4
2016 Q4 966 0 0 0.0
2016 Q3 1,097 0 0 0.0
2016 Q2 838 0 0 0.0
2016 Q1 745 9 1 12080.5
2015 Q4 782 0 0 0.0
2015 Q3 1,136 0 0 0.0
2015 Q2 931 0 0 0.0
2015 Q1 522 0 0 0.0
2014 Q4 695 0 0 0.0
2014 Q3 932 0 0 0.0
2014 Q2 526 6 1 11406.8
2014 Q1 726 0 0 0.0
2013 Q4 290 0 0 0.0
2013 Q3 1,206 0 0 0.0
2013 Q2 930 3 1 3225.8
2013 Q1 1,688 0 0 0.0
2012 Q4 1,937 0 0 0.0
2012 Q3 2,238 0 0 0.0
2012 Q2 2,358 1 0 424.1
2012 Q1 2,224 25 9 11241.0
2011 Q4 1,724 0 0 0.0
2011 Q3 2,179 1 0 458.9
2011 Q2 2,309 0 0 0.0
2011 Q1 2,053 0 0 0.0
2010 Q4 1,559 14 5 8980.1
2010 Q3 1,922 22 9 11446.4
2010 Q2 1,568 0 0 0.0
2010 Q1 1,023 0 0 0.0
2009 Q4 1,186 0 0 0.0
2009 Q3 1,440 0 0 0.0
2009 Q2 2,127 0 0 0.0
2009 Q1 2,166 0 0 0.0
2008 Q4 2,742 2 0 729.4
2008 Q3 2,680 0 0 0.0
2008 Q2 2,616 0 0 0.0
2008 Q1 2,182 2 0 916.6
2007 Q4 2,608 0 0 0.0
2007 Q3 2,862 0 0 0.0
2007 Q2 2,784 0 0 0.0
2007 Q1 2,397 0 0 0.0
2006 Q4 1,871 1 0 534.5
2006 Q3 3,192 0 0 0.0
2006 Q2 2,690 0 0 0.0
2006 Q1 3,196 2 1 625.8
2005 Q4 2,217 0 0 0.0
2005 Q3 2,121 1 0 471.5
2005 Q2 1,795 0 0 0.0
2005 Q1 1,138 0 0 0.0
2004 Q4 624 9 4 14423.1
2004 Q3 1,570 0 0 0.0
2004 Q2 1,173 0 0 0.0
2004 Q1 1,783 6 3 3365.1
2003 Q4 444 0 0 0.0
2003 Q3 1,156 3 0 2595.2
2003 Q2 993 0 0 0.0
2003 Q1 970 0 0 0.0
2002 Q4 636 0 0 0.0
2002 Q3 394 0 0 0.0
2002 Q2 1,178 1 0 848.9
2002 Q1 447 0 0 0.0
2001 Q4 502 0 0 0.0
2001 Q3 358 3 1 8379.9
2001 Q2 657 0 0 0.0
2001 Q1 873 0 0 0.0
2000 Q4 240 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

1 on file

2003 · 1 incident

February 5, 2003 AZ · Metal/Non-Metal mine manager, mine foreman, mine owner SLIP OR FALL OF PERSON
Dyna Rock & Sand Inc. · Fall onto or against objects

THE CREW WAS SETTING A CONVEYOR FOR THE SAND SCREW. THE TAIL END OF THE CONVEYOR WAS SETTING ON AN ABUTTMENT APPROX.5'OFF THE GROUND. THE CREW STARTED BUILDING LEGS UNDER THE HEAD END OF THE CONVEYOR, SECURED BY THE LOADER BUCKET. EE STEPPED ON THE TAIL END TO SECURE THE SAFETY CHAINS BEFORE IT WAS LIFTED TO GET MEASUREMENTS. THE CONVEYOR ROLLED & DROPPED EE FELL ON STABILIZER.