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Troy Quarry: 178 MSHA citations Metal/Non-Metal

Moscow Mills, Lincoln County, MO  ·  Active
MSHA Mine ID: 2302324

Troy Quarry has $82K in proposed MSHA penalties and $151 outstanding across 10 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
Mar 2026
Compliance record
MSHA citations since 2006
178
citations
51
significant & substantial
$81,694
proposed penalties
$76,769
paid to date
94% of proposed penalties paid to date, a $4,925 gap.
Source: MSHA violations data, updated weekly.
See Martin Marietta Materials, Inc.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2006
69
inspections on record
952
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: 952 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Troy Quarry has $82K in proposed MSHA penalties and $151 outstanding across 10 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.
$82K
proposed penalties
$77K
current assessed
$77K
paid to date
$151
outstanding
173 assessments are final orders; 10 contested dockets.
Of $37K in penalties contested before the Commission, $32K was upheld in final decisions.
As of the most recent assessment on 2026-05-05.
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.
29.3%
significant & substantial
7.5%
high negligence or reckless
27.0%
reasonably likely or greater
61.5%
permanently disabling or fatal if injury occurs
Negligence coding: 2.3% none, 14.4% low, 75.9% moderate, 7.5% 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.
18 citations taken to the federal commission · 10% of citations on record
  • Settled 15 · 83%
  • Stood as issued 3 · 17%
75%
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 16 decided S&S contests · industry: 79%
13%
Penalty reduction in decided contests
$37K proposed, $32K 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 2025-03-02.
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
CENT 2019-0332 Settlement Paez 2019 $7K → $7K
CENT 2025-0164 Dismissal 2025 $7K → $7K
CENT 2023-0090 Settlement 2023 $5K → $3K
CENT 2010-1004M Settlement Pope II 2012 $4K → $4K
CENT 2013-258M Settlement Miller 2013 $4K → $2K
CENT 2025-0073 Default 2025 $3K → $3K
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: 2025-10-29
0%
of limit-tested samples over the exposure limit
61
samples
32
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz30
  • Respirable dust, <.1mg20
  • Nuisance dust, respirable, <1% Qtz11
Show the individual readings (61)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-10-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2025-10-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2024-12-20 Respirable dust, <.1mg 0 Supervisor, Co. Official
2024-12-20 Respirable dust, <.1mg 0 Front-end Loader Operator
2024-07-31 Quartz, respirable, >1% Qtz 0.24 Crusher Oper/Worker
2024-07-31 Quartz, respirable, >1% Qtz 0.69 1.79 0.39 Front-end Loader Operator
2024-07-31 Respirable dust, <.1mg 0 Front-end Loader Operator
2022-11-03 Respirable dust, <.1mg 0 Front-end Loader Operator
2022-11-03 Quartz, respirable, >1% Qtz 0.25 Utility Man
2022-11-03 Quartz, respirable, >1% Qtz 0.63 Front-end Loader Operator
2021-10-20 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-10-20 Nuisance dust, respirable, <1% Qtz 0.18 10 0.02 Front-end Loader Operator
2021-10-20 Quartz, respirable, >1% Qtz 0.38 Dry Screen Plant Operator
2021-10-20 Quartz, respirable, >1% Qtz 0.68 Front-end Loader Operator
2020-04-22 Quartz, respirable, >1% Qtz 0.45 Scale Man
2020-04-22 Quartz, respirable, >1% Qtz 0.19 Front-end Loader Operator
2020-04-22 Quartz, respirable, >1% Qtz 0.37 Crusher Oper/Worker
2020-04-22 Quartz, respirable, >1% Qtz 0.64 1.27 0.50 Cleanup Man
2020-04-22 Quartz, respirable, >1% Qtz 0.53 Front-end Loader Operator
2018-05-16 Nuisance dust, respirable, <1% Qtz 0.19 10 0.02 Front-end Loader Operator
2018-05-16 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-05-16 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-05-16 Respirable dust, <.1mg 0 Dry Screen Plant Operator
2017-04-27 Nuisance dust, respirable, <1% Qtz 0.24 10 0.02 Front-end Loader Operator
2017-04-27 Quartz, respirable, >1% Qtz 0.12 1.44 0.08 Front-end Loader Operator
2017-04-27 Nuisance dust, respirable, <1% Qtz 0.12 10 0.01 Laborer, Bullgang
2015-05-13 Respirable dust, <.1mg 0 Front-end Loader Operator
2015-05-13 Nuisance dust, respirable, <1% Qtz 0.16 10 0.02 Front-end Loader Operator
2015-05-13 Respirable dust, <.1mg 0 Truck Driver
2015-05-13 Quartz, respirable, >1% Qtz 0.32 1.86 0.17 Crusher Oper/Worker
2014-01-14 Quartz, respirable, >1% Qtz 1.38 2.06 0.67 Bobcat Operator
2013-11-14 Quartz, respirable, >1% Qtz 0.58 2.88 0.20 Front-end Loader Operator
2013-11-14 Respirable dust, <.1mg 0 Front-end Loader Operator
2013-11-14 Quartz, respirable, >1% Qtz 0.25 1.57 0.16 Utility Man
2013-03-20 Respirable dust, <.1mg 0 Complete Load-Haul-Dump
2013-03-20 Quartz, respirable, >1% Qtz 0.63 1.54 0.41 Crusher Oper/Worker
2013-03-20 Nuisance dust, respirable, <1% Qtz 0.46 10 0.05 Front-end Loader Operator
2012-11-20 Nuisance dust, respirable, <1% Qtz 0.2 10 0.02 Front-end Loader Operator
2012-11-20 Quartz, respirable, >1% Qtz 0.29 1.86 0.16 Utility Man
2012-11-20 Nuisance dust, respirable, <1% Qtz 0.32 10 0.03 Front-end Loader Operator
2012-07-12 Quartz, respirable, >1% Qtz 0.3 2.26 0.13 Truck Driver
2012-07-12 Nuisance dust, respirable, <1% Qtz 0.45 10 0.05 Front-end Loader Operator
2012-07-12 Respirable dust, <.1mg 0 Front-end Loader Operator
2011-04-13 Respirable dust, <.1mg 0 Front-end Loader Operator
2011-04-13 Quartz, respirable, >1% Qtz 0.47 1.71 0.27 Laborer, Bullgang
2011-04-13 Quartz, respirable, >1% Qtz 0.22 1.89 0.12 Crusher Oper/Worker
2011-04-13 Nuisance dust, respirable, <1% Qtz 0.4 10 0.04 Front-end Loader Operator
2010-04-21 Quartz, respirable, >1% Qtz 0.3 1.31 0.23 Mechanic
2010-04-21 Quartz, respirable, >1% Qtz 0.27 1.44 0.19 Front-end Loader Operator
2010-04-21 Quartz, respirable, >1% Qtz 0.38 1.42 0.27 Dry Screen Plant Operator
2009-02-19 Nuisance dust, respirable, <1% Qtz 0.22 10 0.02 Front-end Loader Operator
2009-02-19 Respirable dust, <.1mg 0 Shovel Operator
2007-10-24 Respirable dust, <.1mg 0 Front-end Loader Operator
2007-10-24 Quartz, respirable, >1% Qtz 0.15 0.94 0.16 Complete Load-Haul-Dump
2007-10-24 Respirable dust, <.1mg 0 Backhoe Operator
2006-06-28 Quartz, respirable, >1% Qtz 0.42 1.16 0.36 Utility Man
2006-06-28 Quartz, respirable, >1% Qtz 0.93 1.61 0.58 Utility Man
2006-01-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2006-01-25 Quartz, respirable, >1% Qtz 0.9 0.98 0.92 Utility Man
2006-01-25 Quartz, respirable, >1% Qtz 0.26 2.09 0.12 Utility Man
2006-01-25 Quartz, respirable, >1% Qtz 0.28 2.42 0.12 Front-end Loader 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.

Troy Quarry recorded 0.00 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.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
No reportable injury cases in any year shown. Employee-hours were reported in each of those years, so these are true zeros rather than missing data. Citations, listed in the compliance record above, are inspector-found violations and are counted separately from worker injuries.
Below 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 Missouri, metal and nonmetal mining averaged 2.13 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. Tri County Quarry 2005 to 2010
  2. Bedrock Quarry LLC 2011 to 2025
  3. New Frontier Materials Beta, LLC 2025 to 2026
  4. Martin Marietta Materials, Inc. 2026 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 10
2025 11
2024 7
2023 10
2022 11
2021 10
2020 9
2019 8
2018 7
2017 6
2016 6
2015 8
2014 9
2013 8
2012 7
2011 7
2010 7
2009 6
2008 6
2007 7
2006 6
2005 3
Source: MSHA quarterly employment and production, updated weekly.

Troy Quarry sits in Lincoln County, Missouri, where the Census mining category is 0.4% 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.
Lincoln County, Missouri · Population 61,636
0.4%
Mining share of county employment
$85,276
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 3,280 1 0 304.9
2026 Q1 4,089 0 0 0.0
2025 Q4 4,824 1 0 207.3
2025 Q3 5,321 4 0 751.7
2025 Q2 9,694 0 0 0.0
2025 Q1 3,942 0 0 0.0
2024 Q4 3,525 3 1 851.1
2024 Q3 4,775 5 1 1047.1
Show 75 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 7,044 0 0 0.0
2024 Q1 2,397 7 1 2920.3
2023 Q4 3,444 0 0 0.0
2023 Q3 4,781 0 0 0.0
2023 Q2 5,199 7 0 1346.4
2023 Q1 3,441 0 0 0.0
2022 Q4 3,812 8 0 2098.6
2022 Q3 5,865 0 0 0.0
2022 Q2 5,629 5 0 888.3
2022 Q1 3,491 0 0 0.0
2021 Q4 4,904 4 0 815.7
2021 Q3 4,887 0 0 0.0
2021 Q2 4,888 2 0 409.2
2021 Q1 4,162 2 0 480.5
2020 Q4 4,946 0 0 0.0
2020 Q3 3,648 0 0 0.0
2020 Q2 4,011 2 0 498.6
2019 Q4 4,103 9 2 2193.5
2019 Q3 3,627 7 3 1930.0
2019 Q2 4,519 0 0 0.0
2019 Q1 3,376 18 11 5331.8
2018 Q4 2,876 0 0 0.0
2018 Q3 3,295 0 0 0.0
2018 Q2 3,720 2 0 537.6
2018 Q1 3,218 0 0 0.0
2017 Q4 3,035 7 5 2306.4
2017 Q3 3,372 0 0 0.0
2017 Q2 3,024 3 1 992.1
2017 Q1 3,056 0 0 0.0
2016 Q4 2,698 5 2 1853.2
2016 Q3 3,644 8 4 2195.4
2016 Q2 4,339 0 0 0.0
2016 Q1 3,226 3 1 929.9
2015 Q4 3,843 0 0 0.0
2015 Q3 5,875 0 0 0.0
2015 Q2 4,800 2 0 416.7
2015 Q1 4,487 0 0 0.0
2014 Q4 4,279 2 1 467.4
2014 Q3 5,060 0 0 0.0
2014 Q2 4,324 3 0 693.8
2014 Q1 3,057 0 0 0.0
2013 Q4 3,402 4 1 1175.8
2013 Q3 4,538 3 2 661.1
2013 Q2 4,465 0 0 0.0
2013 Q1 3,474 0 0 0.0
2012 Q4 3,078 6 1 1949.3
2012 Q3 3,716 9 3 2422.0
2012 Q2 4,264 0 0 0.0
2012 Q1 3,416 0 0 0.0
2011 Q4 3,419 3 2 877.4
2011 Q3 4,391 0 0 0.0
2011 Q2 3,765 3 1 796.8
2011 Q1 3,039 0 0 0.0
2010 Q4 3,830 0 0 0.0
2010 Q3 4,093 2 1 488.6
2010 Q2 4,198 5 3 1191.0
2010 Q1 3,736 0 0 0.0
2009 Q4 3,002 4 0 1332.4
2009 Q3 3,910 0 0 0.0
2009 Q2 3,282 1 0 304.7
2009 Q1 2,667 0 0 0.0
2008 Q4 2,693 2 0 742.7
2008 Q3 2,436 0 0 0.0
2008 Q2 3,443 1 1 290.4
2008 Q1 2,735 0 0 0.0
2007 Q4 3,185 2 0 627.9
2007 Q3 4,181 0 0 0.0
2007 Q2 4,208 1 0 237.6
2007 Q1 3,741 0 0 0.0
2006 Q4 4,101 1 0 243.8
2006 Q3 3,784 0 0 0.0
2006 Q2 3,849 1 0 259.8
2006 Q1 3,026 4 1 1321.9
2005 Q4 2,826 0 0 0.0
2005 Q3 304 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

1 on file

2026 · 1 incident

March 18, 2026 MO · Metal/Non-Metal groundman, yardman POWERED HAULAGE
New Frontier Materials Beta, LLC · Caught in, under or between running or meshing objects

The employee was entering a skid steer, lost their footing and fell backwards, catching their left leg between the skid steer and the fork attachment fracturing their leg.