Mining Incidents
Search Operators Mines Alerts Research Controllers Fatalgrams About
English Español
← Back to search

DuBois Quarry: 94 MSHA citations Metal/Non-Metal

DuBoise, Pawnee County, NE  ·  Active
MSHA Mine ID: 2501046

DuBois Quarry has $20K in proposed MSHA penalties and $302 outstanding across 3 contested dockets, plus health sampling and the full incident record.

Watch this mine

Email me when a new MSHA incident is filed at DuBois Quarry.

Fatalities
0
Total incidents
11
Years on record
1990–2026
Latest incident
Jun 2026
Compliance record
MSHA citations since 2001
94
citations
16
significant & substantial
$20,290
proposed penalties
$19,484
paid to date
96% of proposed penalties paid to date, a $806 gap.
Source: MSHA violations data, updated weekly.
See Martin Marietta Materials, Inc.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2001
58
inspections on record
849
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: 849 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

DuBois Quarry has $20K in proposed MSHA penalties and $302 outstanding across 3 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
$20K
current assessed
$19K
paid to date
$302
outstanding
91 assessments are final orders; 3 contested dockets.
Of $4K in penalties contested before the Commission, $2K was upheld in final decisions.
As of the most recent assessment on 2026-06-03.
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.
17.2%
significant & substantial
5.4%
high negligence or reckless
17.2%
reasonably likely or greater
39.8%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 6.5% low, 88.2% moderate, 5.4% 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.
3 citations taken to the federal commission · 3% of citations on record
  • Settled 2 · 67%
  • Vacated or withdrawn 1 · 33%
33%
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%
34%
Penalty reduction in decided contests
$4K proposed, $2K 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 2017-08-16.
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 2017-0281 Settlement Simonton 2017 $3K → $2K
CENT 2017-0459 Withdrawal Miller 2017 $795 → $0
CENT 2017-0257 Settlement Simonton 2017 $356 → $178
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: 2024-01-03
0%
of limit-tested samples over the exposure limit
26
samples
17
limit-tested
Most sampled contaminants
  • Nuisance dust, respirable, <1% Qtz12
  • Respirable dust, <.1mg9
  • Quartz, respirable, >1% Qtz5
Show the individual readings (26)
Date Contaminant Concentration Limit Conc / limit Occupation
2024-01-03 Respirable dust, <.1mg 0 Front-end Loader Operator
2024-01-03 Respirable dust, <.1mg 0 Bobcat Operator
2024-01-03 Respirable dust, <.1mg 0 Utility Man
2017-08-09 Nuisance dust, respirable, <1% Qtz 0.12 10 0.01 Truck Driver
2017-08-09 Nuisance dust, respirable, <1% Qtz 0.35 10 0.04 Front-end Loader Operator
2017-08-09 Quartz, respirable, >1% Qtz 0.73 3.32 0.22 Crusher Oper/Worker
2017-08-09 Nuisance dust, respirable, <1% Qtz 0.13 10 0.01 Truck Driver
2016-04-21 Nuisance dust, respirable, <1% Qtz 0.77 10 0.08 Dry Screen Plant Operator
2016-04-21 Nuisance dust, respirable, <1% Qtz 0.25 10 0.03 Drill Operator, Rotary Air
2015-07-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2015-07-29 Respirable dust, <.1mg 0 Truck Driver
2015-07-29 Respirable dust, <.1mg 0 Drill Operator, Rotary
2015-07-29 Nuisance dust, respirable, <1% Qtz 0.33 10 0.03 Dry Screen Plant Operator
2014-09-24 Nuisance dust, respirable, <1% Qtz 0.85 10 0.09 Drill Operator, Jumbo Perc.
2014-09-24 Nuisance dust, respirable, <1% Qtz 1.04 10 0.10 Crusher Oper/Worker
2014-09-24 Quartz, respirable, >1% Qtz 0.46 1.53 0.30 Truck Driver
2013-01-17 Nuisance dust, respirable, <1% Qtz 0.17 10 0.02 Truck Driver
2013-01-17 Respirable dust, <.1mg 0 Truck Driver
2010-06-11 Quartz, respirable, >1% Qtz 0.52 3.16 0.16 Truck Driver
2010-06-11 Respirable dust, <.1mg 0 Front-end Loader Operator
2005-02-17 Quartz, respirable, >1% Qtz 0.14 1.16 0.12 Front-end Loader Operator
2005-02-17 Quartz, respirable, >1% Qtz 0.44 2.73 0.16 Crusher Oper/Worker
2005-02-17 Nuisance dust, respirable, <1% Qtz 0.26 10 0.03 Truck Driver
2005-02-17 Respirable dust, <.1mg 0 Truck Driver
2005-02-17 Nuisance dust, respirable, <1% Qtz 0.34 10 0.03 Drill Operator, Rotary
2001-05-08 Nuisance dust, respirable, <1% Qtz 0.47 10 0.05 Crusher Oper/Worker
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.

DuBois Quarry recorded 0.00 reportable injury cases per 100 full-time workers in 2023.

Injury rate, 2023
ⓘ 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
Below average. The US metal and nonmetal mining average was 1.78 and the all-US-mining average was 2.10 cases per 100 workers.
In Nebraska, metal and nonmetal mining averaged 2.21 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.
Year total case rate days-away fatal
2023 * 0.00 0.00 0.000
2022 * 0.00 0.00 0.000
2021 * 0.00 0.00 0.000
2020 * 0.00 0.00 0.000
2018 * 0.00 0.00 0.000
2017 * 11.83 0.00 0.000
2016 * 10.65 0.00 0.000
2015 * 5.84 0.00 0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
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. Martin Marietta Aggregates 1985 to 2006
  2. Martin Marietta Materials, Inc. 2006 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 12
2025 11
2024 10
2023 11
2022 10
2021 10
2020 10
2019 9
2018 13
2017 13
2016 14
2015 14
2014 14
2013 14
2012 13
2011 13
2010 13
2009 13
2008 12
2007 12
2006 11
2005 11
2004 11
2003 10
2002 11
2001 11
2000 12
Source: MSHA quarterly employment and production, updated weekly.

DuBois Quarry sits in Pawnee County, Nebraska, 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.
Pawnee County, Nebraska · Population 2,539
0.1%
Mining share of county employment
$54,926
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 6,001 3 0 499.9
2026 Q1 5,041 1 0 198.4
2025 Q4 4,859 0 0 0.0
2025 Q3 4,982 0 0 0.0
2025 Q2 5,560 0 0 0.0
2025 Q1 4,153 2 0 481.6
2024 Q4 4,968 0 0 0.0
2024 Q3 5,608 0 0 0.0
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 5,248 1 0 190.5
2024 Q1 3,672 0 0 0.0
2023 Q4 4,557 0 0 0.0
2023 Q3 6,393 1 0 156.4
2023 Q2 6,777 0 0 0.0
2023 Q1 4,907 0 0 0.0
2022 Q4 5,407 0 0 0.0
2022 Q3 6,962 0 0 0.0
2022 Q2 6,063 2 1 329.9
2022 Q1 4,513 4 0 886.3
2021 Q4 5,773 0 0 0.0
2021 Q3 6,813 4 3 587.1
2021 Q2 6,317 0 0 0.0
2021 Q1 3,516 0 0 0.0
2020 Q4 6,700 0 0 0.0
2020 Q3 6,502 0 0 0.0
2020 Q2 6,309 5 0 792.5
2020 Q1 3,031 0 0 0.0
2019 Q4 1,164 0 0 0.0
2019 Q3 907 0 0 0.0
2019 Q2 4,880 0 0 0.0
2019 Q1 7,477 2 0 267.5
2018 Q4 7,594 0 0 0.0
2018 Q3 7,811 2 1 256.0
2018 Q2 7,940 0 0 0.0
2018 Q1 6,920 1 0 144.5
2017 Q4 8,134 0 0 0.0
2017 Q3 9,474 0 0 0.0
2017 Q2 8,726 0 0 0.0
2017 Q1 7,484 1 1 133.6
2016 Q4 8,620 3 0 348.0
2016 Q3 10,091 0 0 0.0
2016 Q2 10,054 2 0 198.9
2016 Q1 8,793 0 0 0.0
2015 Q4 9,196 2 1 217.5
2015 Q3 9,073 3 0 330.7
2015 Q2 8,294 0 0 0.0
2015 Q1 7,686 0 0 0.0
2014 Q4 8,550 1 0 117.0
2014 Q3 9,140 12 5 1312.9
2014 Q2 8,994 0 0 0.0
2014 Q1 6,727 1 0 148.7
2013 Q4 7,774 0 0 0.0
2013 Q3 8,366 0 0 0.0
2013 Q2 7,879 0 0 0.0
2013 Q1 7,347 1 0 136.1
2012 Q4 7,802 0 0 0.0
2012 Q3 7,432 0 0 0.0
2012 Q2 7,827 3 0 383.3
2012 Q1 7,275 0 0 0.0
2011 Q4 6,998 1 0 142.9
2011 Q3 8,807 3 0 340.6
2011 Q2 7,878 2 1 253.9
2011 Q1 6,237 0 0 0.0
2010 Q4 7,639 2 0 261.8
2010 Q3 7,482 0 0 0.0
2010 Q2 7,343 3 0 408.6
2010 Q1 5,757 0 0 0.0
2009 Q4 7,328 1 0 136.5
2009 Q3 7,313 0 0 0.0
2009 Q2 6,732 0 0 0.0
2009 Q1 6,103 4 0 655.4
2008 Q4 6,767 0 0 0.0
2008 Q3 7,330 0 0 0.0
2008 Q2 7,266 1 0 137.6
2008 Q1 5,436 0 0 0.0
2007 Q4 5,828 0 0 0.0
2007 Q3 7,062 1 0 141.6
2007 Q2 6,382 0 0 0.0
2007 Q1 3,202 0 0 0.0
2006 Q4 5,483 0 0 0.0
2006 Q3 6,021 1 0 166.1
2006 Q2 6,740 0 0 0.0
2006 Q1 6,228 0 0 0.0
2005 Q4 6,403 0 0 0.0
2005 Q3 7,007 0 0 0.0
2005 Q2 6,383 0 0 0.0
2005 Q1 5,191 3 0 577.9
2004 Q4 6,421 0 0 0.0
2004 Q3 5,892 0 0 0.0
2004 Q2 6,236 0 0 0.0
2004 Q1 5,157 0 0 0.0
2003 Q4 4,797 0 0 0.0
2003 Q3 4,466 1 0 223.9
2003 Q2 4,027 0 0 0.0
2003 Q1 2,333 0 0 0.0
2002 Q4 3,976 0 0 0.0
2002 Q3 4,830 1 0 207.0
2002 Q2 5,770 0 0 0.0
2002 Q1 5,279 0 0 0.0
2001 Q4 6,208 0 0 0.0
2001 Q3 5,621 0 0 0.0
2001 Q2 5,918 3 1 506.9
2001 Q1 3,776 0 0 0.0
2000 Q4 5,717 0 0 0.0
2000 Q3 6,013 0 0 0.0
2000 Q2 6,414 0 0 0.0
2000 Q1 6,511 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

11 on file

2026 · 1 incident

June 5, 2026 NE · Metal/Non-Metal INUNDATION
Martin Marietta Materials, Inc. · Accident type, without injuries

Weather conditions caused a rise in the Big Nemaha River water level. This resulted in flood water that inundated Dubois Quarry.

2017 · 2 incidents

November 28, 2017 NE · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Martin Marietta Materials, Inc. · Over-exertion in lifting objects

Strain to lower arm requiring splint for 2 weeks. EE was lifting bags of anfo picking bags up off of the ledge. Grabbing bags with EE's left hand to load the holes. Noticed it about 6pm at home after work. Couldn't get comfortable when EE tried to go to sleep. This morning EE couldn't pick up an orange. Has a hard time opening EE's hand

September 21, 2017 NE · Metal/Non-Metal outside foreman, leadman SLIP OR FALL OF PERSON
Martin Marietta Materials, Inc. · Fall onto or against objects

Employee was ascending a set of stairs leading up and into a trailer. EE tripped at the top step and fell onto the hand rail. The end of the hand rail had an exposed burr that cut into the employees arm requiring 5 stitches.

2016 · 2 incidents

October 3, 2016 NE · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman DISORDERS (REPEATED TRAUMA)
Martin Marietta Materials, Inc. · Over-exertion (Not Elsewhere Classified)

Employee first reported on Oct. 25 2016 that EE has been having pain in EE's elbows (joint and muscle) for a while (more constant since around Oct. 3) from EE's Haul Truck position. The injury was evaluated and on December 1st, was determined to be workers comp.

July 13, 2016 NE · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Martin Marietta Materials, Inc. · Caught in, under or between (Not Elsewhere Classified)

Employee was working with the crew changing out v-belts and hand slipped resulting in one broken finger and one fractured finger on right hand.

2015 · 1 incident

2014 · 1 incident

December 31, 2014 NE · Metal/Non-Metal outside foreman, leadman MACHINERY
Martin Marietta Materials, Inc. · Struck against a moving object

EE reported that while running the dozer he backed over a frozen dirt clod which caused him to jar his back. Health Bridge was contacted. EE was informed by Health Bridge that home care was all that was needed. Ice and Ibuprofen was recommended. January 5th EE saw a doctor and was given a restriction of not operating the Dozer for 2 weeks.

1993 · 1 incident

April 19, 1993 NE · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Martin Marietta Aggregates · Fall from machine

EE WAS TIGHTENING HOOD ON HIS LOADER WHEN HIS FEET SLIPPED OUT FROM UNDERHIM HE FELL APPROX 3 FT TO THE GROUND LANDING ON HIS LEFT SHOULDER.

1992 · 2 incidents

November 10, 1992 NE · Metal/Non-Metal driller, highwall operator, highwall drill operator HANDLING OF MATERIALS
Martin Marietta Aggregates · Over-exertion in lifting objects

EE WAS MOVING 50 LB BAGS FROM ONE TRAILER TO ANOTHER WHEN HE STRAINED THE MUSCLES IN HIS BACK.

October 15, 1992 NE · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Martin Marietta Aggregates · Over-exertion (Not Elsewhere Classified)

EMPLOYEE WAS OPERATING TRUCK FOR LONG PERIODS OF TIME, FAILING TO GET OUT AND STRETCH. THIS CAUSED HIS HAMSTRINGS TO TIGHTEN UP AND PULL HIS BACK.

1990 · 1 incident

February 2, 1990 NE · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Martin Marietta Aggregates · Over-exertion (Not Elsewhere Classified)

HE SQUATTED DOWN WHILE LOADING SHOT WHEN HE GOT BACK UP HE HEARD HIS KNEE POP.