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

Denniston Quarry: 40 MSHA citations Metal/Non-Metal

Controlled by CRH PLC
Monroe, Monroe County, MI  ·  Active
MSHA Mine ID: 2002934

Denniston Quarry has $5K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.

Watch this mine

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

Fatalities
0
Total incidents
15
Years on record
1995–2015
Latest incident
Mar 2015
Compliance record
MSHA citations since 2000
40
citations
4
significant & substantial
$4,651
proposed penalties
$4,619
paid to date
99% of proposed penalties paid to date, a $32 gap.
Source: MSHA violations data, updated weekly.
See Michigan Paving and Materials Company's full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
52
inspections on record
941
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: 941 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Denniston Quarry has $5K in proposed MSHA penalties and $0 outstanding across 1 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.
$5K
proposed penalties
$5K
current assessed
$5K
paid to date
$0
outstanding
39 assessments are final orders; 1 contested dockets.
Of $148 in penalties contested before the Commission, $116 was upheld in final decisions.
As of the most recent assessment on 2025-08-12.
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.
10.0%
significant & substantial
2.5%
high negligence or reckless
10.0%
reasonably likely or greater
40.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 22.5% low, 75.0% moderate, 2.5% 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.
1 citations taken to the federal commission · 3% of citations on record
  • Settled 1 · 100%
22%
Penalty reduction in decided contests
$148 proposed, $116 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 2017-11-09.
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
LAKE 2018-0043 Settlement Feldman 2018 $148 → $116
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: 2026-05-27
0%
of limit-tested samples over the exposure limit
23
samples
6
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg17
  • Nuisance dust, respirable, <1% Qtz6
Show the individual readings (23)
Date Contaminant Concentration Limit Conc / limit Occupation
2026-05-27 Respirable dust, <.1mg 0 Truck Driver
2026-05-27 Respirable dust, <.1mg 0 Front-end Loader Operator
2026-05-27 Respirable dust, <.1mg 0 Front-end Loader Operator
2026-05-27 Respirable dust, <.1mg 0 Laborer, Bullgang
2024-05-09 Respirable dust, <.1mg 0 Laborer, Bullgang
2024-05-09 Nuisance dust, respirable, <1% Qtz 0.26 10 0.03 Backhoe Operator
2024-05-09 Respirable dust, <.1mg 0 Truck Driver
2024-05-09 Respirable dust, <.1mg 0 Washer Operator
2020-11-04 Respirable dust, <.1mg 0 Truck Driver
2020-11-04 Respirable dust, <.1mg 0 Crusher Oper/Worker
2020-11-04 Respirable dust, <.1mg 0 Front-end Loader Operator
2016-05-02 Nuisance dust, respirable, <1% Qtz 0.12 10 0.01 Front-end Loader Operator
2016-05-02 Nuisance dust, respirable, <1% Qtz 0.16 10 0.02 Utility Man
2016-05-02 Respirable dust, <.1mg 0 Front-end Loader Operator
2016-05-02 Nuisance dust, respirable, <1% Qtz 0.18 10 0.02 Supervisor, Co. Official
2016-05-02 Respirable dust, <.1mg 0 Truck Driver
2016-04-27 Nuisance dust, respirable, <1% Qtz 0.14 10 0.01 Backhoe Operator
2016-04-27 Respirable dust, <.1mg 0 Truck Driver
2016-04-27 Respirable dust, <.1mg 0 Truck Driver
2016-04-27 Respirable dust, <.1mg 0 Bulldozer Operator
2011-04-21 Nuisance dust, respirable, <1% Qtz 0.28 10 0.03 Washer Operator
2011-04-21 Respirable dust, <.1mg 0 Truck Driver
2011-04-21 Respirable dust, <.1mg 0 Cleanup Man
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.

Denniston 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 Michigan, metal and nonmetal mining averaged 2.06 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
2025 * 0.00 0.00 0.000
2024 * 0.00 0.00 0.000
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
2019 * 0.00 0.00 0.000
2018 * 0.00 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. Hanson Aggregates Midwest Inc 1994 to 2003
  2. Stoneco of Michigan 2003 to 2008
  3. Michigan Paving and Materials Company 2008 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 14
2025 15
2024 19
2023 19
2022 14
2021 14
2020 15
2019 23
2018 25
2017 17
2016 15
2015 11
2014 8
2013 5
2012 5
2011 5
2010 3
2009 8
2008 15
2007 17
2006 23
2005 20
2004 18
2003 23
2002 28
2001 27
2000 28
Source: MSHA quarterly employment and production, updated weekly.

Denniston Quarry sits in Monroe County, Michigan, where the Census mining category is 0.2% 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.
Monroe County, Michigan · Population 155,001
0.2%
Mining share of county employment
$75,272
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 9,771 0 0 0.0
2026 Q1 6,600 0 0 0.0
2025 Q4 7,858 0 0 0.0
2025 Q3 9,145 1 0 109.3
2025 Q2 9,435 0 0 0.0
2025 Q1 6,835 0 0 0.0
2024 Q4 9,554 0 0 0.0
2024 Q3 10,700 0 0 0.0
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 10,586 2 0 188.9
2024 Q1 7,913 1 0 126.4
2023 Q4 11,126 0 0 0.0
2023 Q3 12,012 0 0 0.0
2023 Q2 10,327 0 0 0.0
2023 Q1 6,941 0 0 0.0
2022 Q4 9,928 0 0 0.0
2022 Q3 10,440 0 0 0.0
2022 Q2 9,871 2 0 202.6
2022 Q1 3,789 0 0 0.0
2021 Q4 8,373 0 0 0.0
2021 Q3 9,753 0 0 0.0
2021 Q2 9,056 0 0 0.0
2021 Q1 4,859 0 0 0.0
2020 Q4 8,938 1 0 111.9
2020 Q3 8,331 0 0 0.0
2020 Q2 8,205 0 0 0.0
2020 Q1 8,304 0 0 0.0
2019 Q4 10,243 0 0 0.0
2019 Q3 13,239 0 0 0.0
2019 Q2 13,472 0 0 0.0
2019 Q1 9,546 0 0 0.0
2018 Q4 12,376 0 0 0.0
2018 Q3 13,882 2 0 144.1
2018 Q2 14,622 0 0 0.0
2018 Q1 10,233 0 0 0.0
2017 Q4 12,531 0 0 0.0
2017 Q3 13,648 4 0 293.1
2017 Q2 10,380 0 0 0.0
2017 Q1 3,914 2 0 511.0
2016 Q4 8,685 0 0 0.0
2016 Q3 10,821 0 0 0.0
2016 Q2 9,139 0 0 0.0
2016 Q1 4,835 0 0 0.0
2015 Q4 6,687 1 0 149.5
2015 Q3 8,092 0 0 0.0
2015 Q2 6,743 0 0 0.0
2015 Q1 3,091 0 0 0.0
2014 Q4 4,888 0 0 0.0
2014 Q3 3,893 0 0 0.0
2014 Q2 4,587 0 0 0.0
2014 Q1 1,182 0 0 0.0
2013 Q4 4,565 0 0 0.0
2013 Q3 2,849 4 0 1404.0
2013 Q2 2,919 0 0 0.0
2013 Q1 1,284 0 0 0.0
2012 Q4 2,240 0 0 0.0
2012 Q3 2,922 0 0 0.0
2012 Q2 3,919 0 0 0.0
2012 Q1 1,061 0 0 0.0
2011 Q4 2,439 0 0 0.0
2011 Q3 1,975 0 0 0.0
2011 Q2 4,509 0 0 0.0
2011 Q1 1,421 0 0 0.0
2010 Q4 1,231 0 0 0.0
2010 Q3 1,345 0 0 0.0
2010 Q2 1,280 0 0 0.0
2010 Q1 1,155 2 0 1731.6
2009 Q4 2,982 0 0 0.0
2009 Q3 5,301 0 0 0.0
2009 Q2 3,670 0 0 0.0
2009 Q1 1,024 0 0 0.0
2008 Q4 5,213 0 0 0.0
2008 Q3 8,402 0 0 0.0
2008 Q2 8,093 0 0 0.0
2008 Q1 5,457 0 0 0.0
2007 Q4 8,187 0 0 0.0
2007 Q3 9,416 0 0 0.0
2007 Q2 11,677 0 0 0.0
2007 Q1 3,942 0 0 0.0
2006 Q4 10,015 0 0 0.0
2006 Q3 12,294 0 0 0.0
2006 Q2 13,926 0 0 0.0
2006 Q1 12,759 0 0 0.0
2005 Q4 10,224 0 0 0.0
2005 Q3 12,486 0 0 0.0
2005 Q2 10,978 0 0 0.0
2005 Q1 7,085 0 0 0.0
2004 Q4 10,339 0 0 0.0
2004 Q3 11,248 0 0 0.0
2004 Q2 11,721 0 0 0.0
2004 Q1 8,978 1 0 111.4
2003 Q4 13,219 0 0 0.0
2003 Q3 10,478 0 0 0.0
2003 Q2 15,185 0 0 0.0
2003 Q1 11,275 0 0 0.0
2002 Q4 14,599 0 0 0.0
2002 Q3 15,782 0 0 0.0
2002 Q2 16,237 0 0 0.0
2002 Q1 13,216 0 0 0.0
2001 Q4 15,047 2 0 132.9
2001 Q3 15,880 0 0 0.0
2001 Q2 15,783 0 0 0.0
2001 Q1 13,951 0 0 0.0
2000 Q4 15,463 2 0 129.3
2000 Q3 15,996 0 0 0.0
2000 Q2 15,889 0 0 0.0
2000 Q1 14,330 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

15 on file

2015 · 1 incident

March 18, 2015 MI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Michigan Paving and Materials Company · Struck by... (Not Elsewhere Classified)

Employee was prying apart 2 pieces of plate to add a spacer to be able to cut the top piece. While prying the pry bar slipped out from in between the two pieces and struck the employee in the lower mouth causing the inside of his lip to be cut by his teeth.

2014 · 1 incident

July 30, 2014 MI · Metal/Non-Metal trespasser OTHER
Michigan Paving and Materials Company · Unclassified, insufficient data

The MSP contacted Stoneco on Monday, July 28, in regards to a missing Monroe resident. The individual was last seen in the Dunbar & South Telegraph area on March 15, 2014 at 11:15 am. MSP requested to search the Northeast high wall & slurry ponds for the missing individual. At 11:19 am on July 30th the MSP K-9 unit discovered human remains at the base of the Northeast high wall.

2007 · 1 incident

July 3, 2007 MI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Stoneco of Michigan · Struck by flying object

Employee and Co-Worker were working on a CAT 365 Excavator in preparation of moving the machine to another facility. The injured employee was struck by a ladder when the counterweight was removed. The injured employee was standing on the ground and fell when he was struck by the ladder.

2004 · 3 incidents

October 13, 2004 MI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Stoneco of Michigan · Caught in, under or between (Not Elsewhere Classified)

Employee was lifting a roller from the back of a pick-up truck. The roller unexpectedly turned and pinched the employee's left index finger.

May 7, 2004 MI · Metal/Non-Metal outside foreman, leadman SLIP OR FALL OF PERSON
Stoneco of Michigan · Fall onto or against objects

Employee was throwing scrap material into a dumpster when he turned around he tripped and fell onto two brake disc. The employee struck his left knee on the brake disc.

February 26, 2004 MI · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator MACHINERY
Stoneco of Michigan · Over-exertion (Not Elsewhere Classified)

EE WAS BENDING OVER TO CUT A HOLE IN A CHUTE WITH A CUTTING TORCH. IN THE PROCESS OF THIS HE STRAINED A MUSCLE IN HIS BACK.

2003 · 2 incidents

October 6, 2003 MI · Metal/Non-Metal
Stoneco of Michigan · -

EE WAS FUELING HIS EXCAVATOR, WHEN THE FUEL NOZZLE SLIPPED OUT OF THE TANK AND SPRAYED A CO-WORKER WITH DIESEL FUEL. THE DIESEL FUEL CAUSED AN IRRITATION TO HIS LEFT EYE.

August 13, 2003 MI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Stoneco of Michigan · Struck by... (Not Elsewhere Classified)

EE WAS WORKING ON LOADER WHEN HIS WRENCH SLIPPED OFF THE BOLT CAUSING THE EE TO CUT HIS LEFT RING FINGER. EE SUFFERED MINOR LACERATION TO HIS FINGER & DIDN'T REPORT THE ACCIDENT TO HIS SUPERVI SOR UNTIL 8/18/03. SUPERVISOR SENT EE TO THE HOSPITAL BECAUSE OF SWELLING HAD OCCURED. THE EE'S ILLNESS WAS AN INFECTION TO HIS FINGER. HE RECEIVED TWO INJECTIONS FROM THE DR. & RTW THAT DAY.

2000 · 1 incident

October 4, 2000 MI · Metal/Non-Metal mine manager, mine foreman, mine owner OTHER
Hanson Aggregates Midwest Inc · Struck by flying object

NOTICED AN IRRITATION IN LEFT EYE AROUND 2:OOPM.NOT SURE WHEN HE GOT DEBRIS IN HIS EYE. WENT TO HOSPITAL TO HAVE IT REMOVED.

1999 · 1 incident

September 10, 1999 MI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech NONPOWERED HAULAGE
Hanson Aggregates Midwest Inc · Struck by falling object

WHILE INJURED WAS CLEANING WORK AREA IN MAINT. GARAGE. HE HAD TO USE A DRUM DOLLY TO RELOCATED 4- DRUMS 55 GAL OF OIL THAT WERE IN HIS WAY. WHILE DOING SO INJURED MOVED A 55 GAL DRUM OF OIL WH EN IT WAS SLAT DOWN HE NOTICED ONE EDGE OF THE DRUM WAS ABOUT 1 1/2" OFF THE FLOOR WITH RIGHT PALM. HE PUSHED TOP OF DRUM AND INDEX FINGER UNDER EDGE OF DRUM HE ATTEMPTED TO LEVEL DRUM, DRUM

1998 · 3 incidents

October 22, 1998 MI · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Hanson Aggregates Midwest Inc · Struck against a moving object

AT THE END OF SHIFT, EE COMPLAINED OF STIFF BACK. HE HAD BEEN OPERATING LOADER ALL DAY.

April 7, 1998 MI · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDTOOLS (NONPOWERED)
Hanson Aggregates Midwest Inc · Struck by falling object

WHILE CLEANING STONE SPILLAGE FROM C-2 CATWALK A ROCK 6"X8" FROM THE PILE 3' HIGH ROLLED DOWN AND STRUCK EMPLOYEE ON LEFT KNEE.

January 26, 1998 MI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Midwest Inc · Caught in, under or between a moving and a stationary object

INJURED WAS BOOST STARTING SNORKEL MAN LIFT, WENT TO CLOSE FLIP TYPE HOOD. RIGHT MIDDLE FINGER BECAME PINCHED BETWEEN HOOD & FRAME WORK ON MACHINE, CAUSING INJURY.

1996 · 1 incident

December 19, 1996 MI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Hanson Aggregates Midwest Inc · Fall to the walkway or working surface

INJURED WAS SPLICING BELT ON C-20 CONVEYOR. LEFTCONVEYOR TO GO OVER TO MAINTENANCE GARAGE TO GETPENETRATING OIL. WHILE WALKING ON ICE IN YARD SLIPPED AND FELL ON ICE CAUSING INJURY.

1995 · 1 incident

November 2, 1995 MI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Hanson Aggregates Midwest Inc · Struck by flying object

WHILE WELDING ON PIPELINE AT DENNISTON QUARRY, FOREIGN OBJECT IMBEDDED ITSELF IN LEFT; EYE CAUSING IRRITATING ABRASIONS.