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Boonville Quarry: 73 MSHA citations Metal/Non-Metal

Booneville, Cooper County, MO  ·  Active
MSHA Mine ID: 2300097

Boonville Quarry has $10K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
17
Years on record
1983–2021
Latest incident
Jan 2021
Compliance record
MSHA citations since 2001
73
citations
13
significant & substantial
$9,564
proposed penalties
$9,564
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Martin Marietta Materials, Inc.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2001
75
inspections on record
1,031
inspection hours
7.1
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.
73 citations across 1,031 inspection hours.
Source: MSHA inspections data, updated weekly.

Boonville Quarry has $10K in proposed MSHA penalties and $0 outstanding across 0 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.
$10K
proposed penalties
$10K
current assessed
$10K
paid to date
$0
outstanding
72 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-01-28.
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.
18.1%
significant & substantial
2.8%
high negligence or reckless
18.1%
reasonably likely or greater
55.6%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 29.2% low, 68.1% moderate, 2.8% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, 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: 2026-06-03
0%
of limit-tested samples over the exposure limit
57
samples
35
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg21
  • Nuisance dust, respirable, <1% Qtz20
  • Quartz, respirable, >1% Qtz16
Show the individual readings (57)
Date Contaminant Concentration Limit Conc / limit Occupation
2026-06-03 Respirable dust, <.1mg 0 Front-end Loader Operator
2026-06-03 Respirable dust, <.1mg 0 Front-end Loader Operator
2024-06-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2024-06-25 Quartz, respirable, >1% Qtz 0.17 0.75 0.23 Rotary Bucket Ex. Operator
2024-06-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2024-06-25 Respirable dust, <.1mg 0 Rotary Bucket Ex. Operator
2022-11-29 Respirable dust, <.1mg 0 Crusher Oper/Worker
2022-11-29 Respirable dust, <.1mg 0 Truck Driver
2022-11-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2022-11-29 Respirable dust, <.1mg 0 Utility Man
2020-09-24 Quartz, respirable, >1% Qtz 1.15 1.56 0.74 Cleanup Man
2020-09-24 Quartz, respirable, >1% Qtz 0.3 Dry Screen Plant Operator
2020-09-24 Nuisance dust, respirable, <1% Qtz 0.12 10 0.01 Rotary Bucket Ex. Operator
2017-06-21 Nuisance dust, respirable, <1% Qtz 0.14 10 0.01 Dry Screen Plant Operator
2017-06-21 Respirable dust, <.1mg 0 Truck Driver
2017-06-21 Respirable dust, <.1mg 0 Front-end Loader Operator
2017-06-21 Nuisance dust, respirable, <1% Qtz 0.39 10 0.04 Front-end Loader Operator
2017-06-21 Quartz, respirable, >1% Qtz 0.51 2.92 0.17 Utility Man
2013-05-23 Respirable dust, <.1mg 0 Truck Driver
2013-05-23 Nuisance dust, respirable, <1% Qtz 0.34 10 0.03 Front-end Loader Operator
2013-05-23 Quartz, respirable, >1% Qtz 0.28 1.98 0.14 Dry Screen Plant Operator
2013-05-23 Quartz, respirable, >1% Qtz 0.42 1.43 0.29 Crusher Oper/Worker
2013-05-23 Respirable dust, <.1mg 0 Front-end Loader Operator
2011-11-01 Nuisance dust, respirable, <1% Qtz 0.51 10 0.05 Front-end Loader Operator
2011-11-01 Nuisance dust, respirable, <1% Qtz 0.55 10 0.06 Front-end Loader Operator
2011-11-01 Respirable dust, <.1mg 0 Truck Driver
2011-11-01 Nuisance dust, respirable, <1% Qtz 0.28 10 0.03 Front-end Loader Operator
2011-04-07 Respirable dust, <.1mg 0 Front-end Loader Operator
2011-04-07 Nuisance dust, respirable, <1% Qtz 1.18 10 0.12 Complete Load-Haul-Dump
2011-04-07 Respirable dust, <.1mg 0 Front-end Loader Operator
2011-04-07 Nuisance dust, respirable, <1% Qtz 0.27 10 0.03 Truck Driver
2011-04-07 Nuisance dust, respirable, <1% Qtz 0.16 10 0.02 Bobcat Operator
2008-09-10 Quartz, respirable, >1% Qtz 0.13 1.1 0.12 Front-end Loader Operator
2008-09-10 Quartz, respirable, >1% Qtz 0.5 2.13 0.23 Front-end Loader Operator
2008-08-13 Nuisance dust, respirable, <1% Qtz 0.14 10 0.01 Front-end Loader Operator
2008-08-13 Nuisance dust, respirable, <1% Qtz 0.15 10 0.02 Truck Driver
2008-08-13 Quartz, respirable, >1% Qtz 0.63 1.7 0.37 Utility Man
2007-05-02 Nuisance dust, respirable, <1% Qtz 0.4 10 0.04 Front-end Loader Operator
2007-05-02 Nuisance dust, respirable, <1% Qtz 1.18 10 0.12 Front-end Loader Operator
2007-05-02 Respirable dust, <.1mg 0 Truck Driver
2005-11-16 Nuisance dust, respirable, <1% Qtz 0.71 10 0.07 Front-end Loader Operator
2005-11-16 Nuisance dust, respirable, <1% Qtz 0.15 10 0.02 Drill Operator, Rotary
2005-11-16 Respirable dust, <.1mg 0 Crusher Oper/Worker
2005-11-16 Quartz, respirable, >1% Qtz 0.19 1.21 0.16 Truck Driver
2005-11-16 Quartz, respirable, >1% Qtz 0.64 1.77 0.36 Laborer, Bullgang
2004-04-28 Respirable dust, <.1mg 0 Crusher Oper/Worker
2004-04-28 Quartz, respirable, >1% Qtz 0.33 1.28 0.26 Laborer, Bullgang
2002-06-05 Nuisance dust, respirable, <1% Qtz 0.12 10 0.01 Utility Man
2002-06-05 Respirable dust, <.1mg 0 Front-end Loader Operator
2002-06-05 Respirable dust, <.1mg 0 Truck Driver
2002-06-05 Quartz, respirable, >1% Qtz 0.52 0.86 0.60 Crusher Oper/Worker
2002-06-05 Nuisance dust, respirable, <1% Qtz 0.21 10 0.02 Mechanic
2001-08-16 Quartz, respirable, >1% Qtz 0.46 1.28 0.36 Laborer, Bullgang
2001-08-16 Quartz, respirable, >1% Qtz 0.4 1.68 0.24 Supervisor, Co. Official
2001-08-16 Quartz, respirable, >1% Qtz 0.33 1.88 0.18 Truck Loader
2001-08-16 Nuisance dust, respirable, <1% Qtz 0.16 10 0.02 Truck Driver
2001-08-16 Nuisance dust, respirable, <1% Qtz 0.25 10 0.03 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.

Boonville Quarry recorded 0.00 reportable injury cases per 100 full-time workers in 2000.

Injury rate, 2000
ⓘ 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 4.77 and the all-US-mining average was 5.64 cases per 100 workers.
In Missouri, metal and nonmetal mining averaged 6.34 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. Hall & Riley Quarries & Construction Co Inc 1950 to 2000
  2. Apac-Missouri, Inc. 2000 to 2016
  3. Con-Agg Companies,LLC 2016 to 2026
  4. Martin Marietta Materials, Inc. 2026 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 5
2025 4
2024 6
2023 7
2022 5
2021 5
2020 4
2019 4
2018 4
2017 4
2016 5
2015 6
2014 6
2013 8
2012 4
2011 8
2010 5
2009 6
2008 7
2007 7
2006 7
2005 10
2004 10
2003 6
2002 11
2001 14
2000 19
Source: MSHA quarterly employment and production, updated weekly.

Boonville Quarry sits in Cooper 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.
Cooper County, Missouri · Population 16,835
0.1%
Mining share of county employment
$67,548
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 3,593 0 0 0.0
2026 Q1 217 1 0 4608.3
2025 Q4 2,674 0 0 0.0
2025 Q3 2,203 0 0 0.0
2025 Q2 3,875 1 0 258.1
2025 Q1 2,690 0 0 0.0
2024 Q4 4,921 0 0 0.0
2024 Q3 5,155 0 0 0.0
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 4,718 1 0 212.0
2024 Q1 4,326 0 0 0.0
2023 Q4 3,515 0 0 0.0
2023 Q3 5,632 0 0 0.0
2023 Q2 5,325 1 0 187.8
2023 Q1 3,765 0 0 0.0
2022 Q4 3,621 0 0 0.0
2022 Q3 4,490 0 0 0.0
2022 Q2 3,985 1 0 250.9
2022 Q1 4,035 0 0 0.0
2021 Q4 4,752 0 0 0.0
2021 Q3 4,045 0 0 0.0
2021 Q2 3,072 0 0 0.0
2021 Q1 2,688 0 0 0.0
2020 Q4 2,966 1 0 337.2
2020 Q3 2,793 2 0 716.1
2020 Q2 3,086 0 0 0.0
2020 Q1 2,879 1 0 347.3
2019 Q4 2,339 0 0 0.0
2019 Q3 2,476 2 0 807.8
2019 Q2 3,326 0 0 0.0
2019 Q1 2,806 2 0 712.8
2018 Q4 2,354 0 0 0.0
2018 Q3 2,836 0 0 0.0
2018 Q2 2,236 1 0 447.2
2018 Q1 2,005 1 0 498.8
2017 Q4 2,094 0 0 0.0
2017 Q3 2,992 0 0 0.0
2017 Q2 3,229 2 0 619.4
2017 Q1 2,563 1 0 390.2
2016 Q4 3,173 0 0 0.0
2016 Q3 3,869 0 0 0.0
2016 Q2 2,818 3 1 1064.6
2016 Q1 2,355 3 1 1273.9
2015 Q4 2,797 0 0 0.0
2015 Q3 2,103 3 1 1426.5
2015 Q2 2,184 0 0 0.0
2015 Q1 2,336 1 0 428.1
2014 Q4 2,293 0 0 0.0
2014 Q3 3,192 4 1 1253.1
2014 Q2 3,861 0 0 0.0
2014 Q1 1,465 1 0 682.6
2013 Q4 2,926 0 0 0.0
2013 Q3 3,862 0 0 0.0
2013 Q2 4,512 3 0 664.9
2013 Q1 3,301 0 0 0.0
2012 Q4 2,557 1 0 391.1
2012 Q3 1,802 4 1 2219.8
2012 Q2 550 0 0 0.0
2012 Q1 549 0 0 0.0
2011 Q4 3,752 2 1 533.0
2011 Q3 4,529 0 0 0.0
2011 Q2 4,991 2 0 400.7
2011 Q1 3,022 0 0 0.0
2010 Q4 2,725 2 0 733.9
2010 Q3 2,820 0 0 0.0
2010 Q2 2,899 0 0 0.0
2010 Q1 1,909 1 0 523.8
2009 Q4 2,046 0 0 0.0
2009 Q3 3,470 3 0 864.6
2009 Q2 4,216 0 0 0.0
2009 Q1 2,923 0 0 0.0
2008 Q4 3,269 0 0 0.0
2008 Q3 4,030 1 0 248.1
2008 Q2 3,947 1 0 253.4
2008 Q1 2,786 0 0 0.0
2007 Q4 3,272 1 0 305.6
2007 Q3 3,979 0 0 0.0
2007 Q2 4,961 0 0 0.0
2007 Q1 2,122 0 0 0.0
2006 Q4 2,095 1 0 477.3
2006 Q3 2,901 0 0 0.0
2006 Q2 3,567 0 0 0.0
2006 Q1 4,140 0 0 0.0
2005 Q4 4,143 2 1 482.7
2005 Q3 5,624 0 0 0.0
2005 Q2 5,944 0 0 0.0
2005 Q1 4,224 0 0 0.0
2004 Q4 3,916 1 1 255.4
2004 Q3 4,552 2 0 439.4
2004 Q2 5,059 0 0 0.0
2004 Q1 5,602 0 0 0.0
2003 Q4 3,559 3 1 842.9
2003 Q3 2,931 6 2 2047.1
2003 Q2 1,332 0 0 0.0
2003 Q1 1,573 0 0 0.0
2002 Q4 3,598 0 0 0.0
2002 Q3 4,627 0 0 0.0
2002 Q2 6,630 0 0 0.0
2002 Q1 4,365 0 0 0.0
2001 Q4 4,608 0 0 0.0
2001 Q3 8,861 2 0 225.7
2001 Q2 2,399 0 0 0.0
2001 Q1 3,498 0 0 0.0
2000 Q4 6,369 0 0 0.0
2000 Q3 9,895 0 0 0.0
2000 Q2 8,345 0 0 0.0
2000 Q1 9,217 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

17 on file

2021 · 1 incident

2014 · 1 incident

August 14, 2014 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Apac-Missouri, Inc. · Struck against stationary object

Worker removing fuel line to bleed system; line came loose and worker struck wrist of left hand on metal bracket

2012 · 1 incident

March 6, 2012 MO · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor SLIP OR FALL OF PERSON
Apac-Missouri, Inc. · Fall from ladders

Employee was standing on the third run of a ladder (3') trying to take off a nut with a ratchet style wrench. The wrench slipped out of the employee's hand causing him to lose his balance and fall on his right side. The employee tried to break his fall with his right hand causing a facture to the wrist.

2007 · 1 incident

April 19, 2007 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Apac-Missouri, Inc. · Caught in, under or between a moving and a stationary object

After completing routine mantenance, employee was closing the hood when a stabilizing shock failed, causing the 250 lb. hood to close rapidly. He attempted to remove his hand from the area but was unsuccessful in doing so. He pinched his finger in safety latch of hood, fracturing the fingertip.

2004 · 1 incident

April 12, 2004 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Apac-Missouri, Inc. · Struck by falling object

EMPLOYEE WAS CLEANING LOOSE MATERIAL AROUND QUARRY CRUSHER WITH BOBCAT WHEN A 6"ROCK FELL FROM THE CONVEYOR AND STRUCK EE ON THE LEFT KNEE CAUSING A CONTUSION.

2003 · 1 incident

November 25, 2003 MO · Metal/Non-Metal
Apac-Missouri, Inc. · -

THE EE TRIED TO PLACE CURTAIN LINER IN THE IMPACTOR BY HIMSELF. HE WAS DOING IT WITH ANOTHER EE. AS HE PLACED THE BLOCK HE GOT HIS LEFT THUMB CAUGHT BETWEEN AND SMASHED IT, CAUSING A LACERATIO N AND CONTUSION.

1996 · 1 incident

June 27, 1996 MO · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON
Hall & Riley Quarries & Construction Co Inc · Fall to lower level, (Not Elsewhere Classified)

STEP BACK OFF OF CONCRETE PAD TO GROUND (6" STEP DOWN) AND TWISTED LEFT FOOT, CAUSING HAIRLINE CRACK TO LEFT ANKLE.

1995 · 1 incident

February 17, 1995 MO · Metal/Non-Metal ledgeman/hand, quarry man MACHINERY
Hall & Riley Quarries & Construction Co Inc · Struck by... (Not Elsewhere Classified)

THE PLANTMAN WAS DIRECTING THE FEEDERMAN ON BREAKER POSITIONING, WHEN THE BREAKER HIT TH EPLANTMANS HAND. THE RIGHT INDEX FINGER WAS INJURED WHEN HTI BETWEEN THE BREAKER & THE HARD RAILING.

1993 · 1 incident

May 14, 1993 MO · Metal/Non-Metal beltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor rider FALL OF FACE/RIB/PILLAR/SIDE/HIGHWALL
Hall & Riley Quarries & Construction Co Inc · Struck by falling object

EE WAS STANDING IN ROCK BOX TALKING TO ANOTHER PERSON WHEN A 5-10 ROCK FELL ASPPROX. 1 1/2 FT STRIKING HIM ON THE TOP OF HIS RIGHT FOOT CAUISNG A POSSIBLE SLIGHT FRACTURE TO HIS FEET.

1992 · 2 incidents

September 21, 1992 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Hall & Riley Quarries & Construction Co Inc · Fall to lower level, (Not Elsewhere Classified)

WORK WAS BEING PERFORMED ON THE IMPACT II CRUSHER GUARD RAIL HAD TEMPORAIRLY LET DOWN SO A LOADER COULD MANOVER PARTS INTO PLACE WITH THE RAILING UP BUT STILL LOOSE THE EMPLOYEE LOST HIS BALAN CE & FELL APPROX 6-8FT TO GROUND BREAKING RT WRIST

August 24, 1992 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Hall & Riley Quarries & Construction Co Inc · Fall from machine

55061S REALIGING V BELTS ON OVERHEAD CONVEYOR USING A 20 MALL TO REPOSITION THE SPEADRACER HE LOST HIS BALANCE HIT THE GUARD RAIL THE RAIL BRAKE AND HE FELL APPROX. 10 FT TO THE GROUND.

1989 · 2 incidents

July 17, 1989 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
Hall & Riley Quarries & Construction Co Inc · Caught in, under or between a moving and a stationary object

INJURED WAS ASSITING HAMMER CHANGE & DIDNT HAVE HIS RT FOOT CLEAR WHEN THE ROTER WAS ROTATED CATCHING HIS RT FOOT BETWEEN A HAMMER & THE BACK OF MILL BRUISING IT SEVERLY

1988 · 3 incidents

June 29, 1988 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hall & Riley Quarries & Construction Co Inc · Caught in, under or between a moving and a stationary object

INJURED WAS OVERHAULING ENGINE AND WHILE INSERTING PISTON IN SLEEVE SOMEHOW HIS FINGER WAS THRU A PORT HOLE AND THE PISTON DROPPED ON HIS FINGER CAUSING A CUT.

May 5, 1988 MO · Metal/Non-Metal ledgeman/hand, quarry man HANDTOOLS (NONPOWERED)
Hall & Riley Quarries & Construction Co Inc · Struck by... (Not Elsewhere Classified)

INJURED WAS ATTEMPTING TO BREAK A ROCK WITH A SLEDGE HAMMER AND MADE A WILD SWING WITH A HAMMER GLANCED OFF ROCK AND HIT HIS HAND GIVING HIM A 1 1/2CENTIMETER LACERATION OF THE SCALP REQUIRING 2 STITCHES.

1983 · 1 incident

July 8, 1983 MO · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Hall & Riley Quarries & Construction Co Inc · Struck against a moving object

INJURED SAID GEAR SHIFT JUMPED OUT OF GREAR & WHILE TRYING TO GET BACK IN GEAR TRUCK WAS ROLLING BOOK DOWNHILL & GAINED MOMENTAM & SLAMED INTO WALL BEFORE HE COULD GET IT STOPPED.