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Jeff City Quarry: 90 MSHA citations Metal/Non-Metal

Loose Creek, Cole County, MO  ·  Intermittent
MSHA Mine ID: 2302221

Jeff City Quarry has $20K in proposed MSHA penalties and $0 outstanding across 4 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
1
Years on record
2004
Latest incident
Nov 2004
Compliance record
MSHA citations since 2002
90
citations
21
significant & substantial
$20,010
proposed penalties
$17,175
paid to date
86% of proposed penalties paid to date, a $2,835 gap.
Source: MSHA violations data, updated weekly.
See Martin Marietta Materials, Inc.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2002
59
inspections on record
661
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: 661 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Jeff City Quarry has $20K in proposed MSHA penalties and $0 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.
$20K
proposed penalties
$17K
current assessed
$17K
paid to date
$0
outstanding
90 assessments are final orders; 4 contested dockets.
Of $6K in penalties contested before the Commission, $3K was upheld in final decisions.
As of the most recent assessment on 2025-03-25.
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.
23.3%
significant & substantial
7.8%
high negligence or reckless
23.3%
reasonably likely or greater
62.2%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 13.3% low, 78.9% moderate, 7.8% 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.
4 citations taken to the federal commission · 4% of citations on record
  • Settled 3 · 75%
  • Vacated or withdrawn 1 · 25%
67%
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 3 decided S&S contests · industry: 79%
51%
Penalty reduction in decided contests
$6K proposed, $3K 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 2019-01-28.
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 2015-0594 Settlement Miller 2016 $3K → $1K
CENT 2015-0529 Settlement Miller 2016 $2K → $1K
CENT 2013-650M Settlement Lesnick 2014 $971 → $486
CENT 2019-0115 Withdrawal Gill 2019 $118 → $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: 2025-10-14
0%
of limit-tested samples over the exposure limit
26
samples
6
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg18
  • Quartz, respirable, >1% Qtz7
  • Nuisance dust, respirable, <1% Qtz1
Show the individual readings (26)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-10-14 Respirable dust, <.1mg 0 Front-end Loader Operator
2025-03-26 Respirable dust, <.1mg 0 Front-end Loader Operator
2024-09-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2019-12-18 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-03-15 Respirable dust, <.1mg 0 Crusher Oper/Worker
2018-03-15 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-03-15 Quartz, respirable, >1% Qtz 0.22 Laborer, Bullgang
2018-03-15 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-03-15 Quartz, respirable, >1% Qtz 0.19 Truck Driver
2016-06-08 Respirable dust, <.1mg 0 Front-end Loader Operator
2016-06-08 Nuisance dust, respirable, <1% Qtz 0.12 10 0.01 Front-end Loader Operator
2012-10-02 Respirable dust, <.1mg 0 Mechanic
2012-10-02 Respirable dust, <.1mg 0 Front-end Loader Operator
2012-04-19 Respirable dust, <.1mg 0 Backhoe Operator
2012-04-19 Quartz, respirable, >1% Qtz 0.21 0.49 0.43 Laborer, Bullgang
2012-04-19 Quartz, respirable, >1% Qtz 0.14 0.59 0.24 Front-end Loader Operator
2011-04-06 Quartz, respirable, >1% Qtz 0.12 0.79 0.15 Front-end Loader Operator
2011-04-06 Respirable dust, <.1mg 0 Front-end Loader Operator
2010-04-28 Respirable dust, <.1mg 0 Front-end Loader Operator
2010-04-28 Respirable dust, <.1mg 0 Truck Driver
2010-04-28 Quartz, respirable, >1% Qtz 0.2 1.35 0.15 Backhoe Operator
2006-02-15 Quartz, respirable, >1% Qtz 0.13 0.78 0.17 Front-end Loader Operator
2006-02-15 Respirable dust, <.1mg 0 Mechanic
2006-02-15 Respirable dust, <.1mg 0 Mechanic
2006-02-15 Respirable dust, <.1mg 0 Front-end Loader Operator
2004-05-13 Respirable dust, <.1mg 0 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.
Ownership history
  1. Muenks Bros Quarries Inc 2000 to 2008
  2. Stockman Quarry, LLC 2008 to 2017
  3. Con-Agg Companies, LLC 2017 to 2026
  4. Martin Marietta Materials, Inc. 2026 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 1
2025 1
2024 1
2023 1
2022 1
2021 1
2020 2
2019 2
2018 3
2017 4
2016 4
2015 5
2014 6
2013 5
2012 6
2011 4
2010 3
2009 4
2008 2
2007 2
2006 4
2005 6
2004 7
2003 6
2002 4
2001 4
Source: MSHA quarterly employment and production, updated weekly.

Jeff City Quarry sits in Cole County, Missouri, where the Census mining category is 0.1% 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.
Cole County, Missouri · Population 76,924
0.1%
Mining share of county employment
$73,273
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 650 0 0 0.0
2026 Q1 54 0 0 0.0
2025 Q4 585 0 0 0.0
2025 Q3 564 0 0 0.0
2025 Q2 643 0 0 0.0
2025 Q1 520 1 0 1923.1
2024 Q4 585 0 0 0.0
2024 Q3 361 0 0 0.0
Show 92 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 640 0 0 0.0
2024 Q1 595 0 0 0.0
2023 Q4 585 0 0 0.0
2023 Q3 1,286 0 0 0.0
2023 Q2 649 0 0 0.0
2023 Q1 487 0 0 0.0
2022 Q4 599 0 0 0.0
2022 Q3 680 0 0 0.0
2022 Q2 615 0 0 0.0
2022 Q1 688 0 0 0.0
2021 Q4 611 0 0 0.0
2021 Q3 755 0 0 0.0
2021 Q2 979 1 0 1021.5
2021 Q1 1,151 0 0 0.0
2020 Q4 1,412 0 0 0.0
2020 Q3 1,626 0 0 0.0
2020 Q2 1,790 1 0 558.7
2020 Q1 2,586 0 0 0.0
2019 Q4 1,776 3 0 1689.2
2019 Q3 1,611 0 0 0.0
2019 Q2 2,159 4 1 1852.7
2019 Q1 1,192 0 0 0.0
2018 Q4 1,487 0 0 0.0
2018 Q3 2,436 1 0 410.5
2018 Q2 2,617 0 0 0.0
2018 Q1 1,080 1 0 925.9
2017 Q4 887 0 0 0.0
2017 Q3 1,125 0 0 0.0
2017 Q2 1,380 3 1 2173.9
2017 Q1 1,567 2 0 1276.3
2016 Q4 1,383 0 0 0.0
2016 Q3 1,059 0 0 0.0
2016 Q2 1,218 2 0 1642.0
2016 Q1 1,201 0 0 0.0
2015 Q4 1,399 2 0 1429.6
2015 Q3 1,348 0 0 0.0
2015 Q2 2,912 4 3 1373.6
2015 Q1 2,482 0 0 0.0
2014 Q4 2,468 4 3 1620.7
2014 Q3 2,964 0 0 0.0
2014 Q2 2,211 2 1 904.6
2014 Q1 2,293 0 0 0.0
2013 Q4 2,530 1 0 395.3
2013 Q3 2,246 0 0 0.0
2013 Q2 2,260 4 1 1769.9
2013 Q1 2,916 0 0 0.0
2012 Q4 2,476 3 1 1211.6
2012 Q3 2,651 0 0 0.0
2012 Q2 3,419 2 1 585.0
2012 Q1 2,793 0 0 0.0
2011 Q4 2,289 2 1 873.7
2011 Q3 1,999 0 0 0.0
2011 Q2 1,744 5 0 2867.0
2011 Q1 1,108 0 0 0.0
2010 Q4 1,145 3 1 2620.1
2010 Q3 1,587 0 0 0.0
2010 Q2 1,627 3 1 1843.9
2010 Q1 1,514 0 0 0.0
2009 Q4 1,167 5 2 4284.5
2009 Q3 1,647 3 0 1821.5
2009 Q2 1,363 0 0 0.0
2009 Q1 1,218 3 1 2463.1
2008 Q4 1,101 0 0 0.0
2008 Q3 821 0 0 0.0
2008 Q2 380 5 1 13157.9
2008 Q1 154 0 0 0.0
2007 Q4 410 0 0 0.0
2007 Q3 245 1 0 4081.6
2007 Q2 540 6 1 11111.1
2007 Q1 1,285 0 0 0.0
2006 Q4 1,684 0 0 0.0
2006 Q3 4,690 0 0 0.0
2006 Q2 3,246 1 0 308.1
2006 Q1 1,254 0 0 0.0
2005 Q4 2,380 0 0 0.0
2005 Q3 2,175 0 0 0.0
2005 Q2 1,742 0 0 0.0
2005 Q1 2,406 0 0 0.0
2004 Q4 2,314 0 0 0.0
2004 Q3 2,228 0 0 0.0
2004 Q2 1,879 0 0 0.0
2004 Q1 1,912 0 0 0.0
2003 Q4 2,171 0 0 0.0
2003 Q3 2,698 7 1 2594.5
2003 Q2 2,940 0 0 0.0
2002 Q4 2,116 3 0 1417.8
2002 Q3 2,513 0 0 0.0
2002 Q2 1,812 0 0 0.0
2002 Q1 1,712 0 0 0.0
2001 Q4 2,174 0 0 0.0
2001 Q3 2,588 0 0 0.0
2001 Q2 1,369 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

1 on file

2004 · 1 incident

November 16, 2004 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Muenks Bros Quarries Inc · Over-exertion in lifting objects

EMPLOYEE PUSHED UPWARD ON A CONVEYOR GUARD TO FREE ROCK THAT WAS TRAPPED WITHIN. HE FELT BACK PAIN LATER IN THE DAY AND HAD DIFFICULTY CLIMBING INTO EQUIPMENT.