Mining Incidents

Ferguson Quarry: 98 MSHA citations Metal/Non-Metal

Ferguson, Marshall County, IA  ·  Active
MSHA Mine ID: 1300124

Ferguson Quarry has $13K 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
19
Years on record
1985–2024
Latest incident
May 2024
Compliance record
MSHA citations since 2000
98
citations
11
significant & substantial
$12,797
proposed penalties
$12,797
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
63
inspections on record
843
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: 843 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Ferguson Quarry has $13K 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.
$13K
proposed penalties
$13K
current assessed
$13K
paid to date
$0
outstanding
98 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-11-25.
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.
11.2%
significant & substantial
7.1%
high negligence or reckless
11.2%
reasonably likely or greater
59.2%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 18.4% low, 74.5% moderate, 7.1% 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: 2025-11-25
0%
of limit-tested samples over the exposure limit
27
samples
10
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg16
  • Quartz, respirable, >1% Qtz7
  • Nuisance dust, respirable, <1% Qtz4
Show the individual readings (27)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-11-25 Respirable dust, <.1mg 0 Cleanup Man
2024-11-26 Respirable dust, <.1mg 0 Truck Driver
2024-11-26 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-10-05 Quartz, respirable, >1% Qtz 0.3 Cleanup Man
2023-10-05 Nuisance dust, respirable, <1% Qtz 0.21 10 0.02 Truck Driver
2023-03-15 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-03-15 Respirable dust, <.1mg 0 Jackhammer Operator
2021-06-09 Respirable dust, <.1mg 0 Washer Operator
2021-06-09 Respirable dust, <.1mg 0 Front-end Loader Operator
2017-09-20 Respirable dust, <.1mg 0 Supervisor, Co. Official
2017-09-20 Quartz, respirable, >1% Qtz 0.39 2.57 0.15 Truck Driver
2017-09-20 Nuisance dust, respirable, <1% Qtz 0.16 10 0.02 Crusher Oper/Worker
2017-09-20 Respirable dust, <.1mg 0 Laborer, Bullgang
2017-09-20 Respirable dust, <.1mg 0 Front-end Loader Operator
2014-10-21 Respirable dust, <.1mg 0 Front-end Loader Operator
2014-10-21 Respirable dust, <.1mg 0 Truck Driver
2013-11-20 Respirable dust, <.1mg 0 Front-end Loader Operator
2012-05-02 Nuisance dust, respirable, <1% Qtz 0.29 10 0.03 Truck Driver
2012-05-02 Quartz, respirable, >1% Qtz 0.51 1.59 0.32 Truck Driver
2012-05-02 Nuisance dust, respirable, <1% Qtz 0.16 10 0.02 Mechanic
2012-05-02 Quartz, respirable, >1% Qtz 0.33 1.76 0.19 Crusher Oper/Worker
2010-06-16 Respirable dust, <.1mg 0 Truck Driver
2003-05-28 Respirable dust, <.1mg 0 Front-end Loader Operator
2003-05-28 Quartz, respirable, >1% Qtz 0.79 1.71 0.46 Truck Driver
2003-05-28 Quartz, respirable, >1% Qtz 0.7 2.16 0.32 Front-end Loader Operator
2003-05-28 Respirable dust, <.1mg 0 Utility Man
2003-05-28 Quartz, respirable, >1% Qtz 0.34 1.6 0.21 Truck Driver
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.

Ferguson Quarry recorded 0.00 reportable injury cases per 100 full-time workers in 2024.

Injury rate, 2024
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 1.77 and the all-US-mining average was 2.08 cases per 100 workers.
In Iowa, metal and nonmetal mining averaged 1.47 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
2024 * 0.00 0.00 0.000
2023 * 7.36 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
2017 * 15.13 0.00 0.000
2006 * 0.00 0.00 0.000
2005 * 4.37 4.37 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 1950 to 2006
  2. Martin Marietta Materials, Inc. 2006 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 6
2025 10
2024 12
2023 12
2022 11
2021 10
2020 11
2019 7
2018 8
2017 11
2016 3
2015 2
2014 2
2013 4
2012 8
2011 10
2010 6
2009 5
2008 4
2007 5
2006 11
2005 17
2004 17
2003 17
2002 17
2001 18
2000 17
Source: MSHA quarterly employment and production, updated weekly.

Ferguson Quarry sits in Marshall County, Iowa, where the Census mining category is 0.6% 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.
Marshall County, Iowa · Population 39,971
0.6%
Mining share of county employment
$72,785
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 2,763 0 0 0.0
2026 Q1 2,437 0 0 0.0
2025 Q4 6,693 1 0 149.4
2025 Q3 6,050 2 1 330.6
2025 Q2 2,562 0 0 0.0
2025 Q1 2,663 0 0 0.0
2024 Q4 10,247 0 0 0.0
2024 Q3 8,787 2 0 227.6
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 7,602 0 0 0.0
2024 Q1 3,079 0 0 0.0
2023 Q4 3,471 3 0 864.3
2023 Q3 11,058 0 0 0.0
2023 Q2 8,602 0 0 0.0
2023 Q1 4,037 1 0 247.7
2022 Q4 10,611 1 0 94.2
2022 Q3 8,200 0 0 0.0
2022 Q2 4,764 0 0 0.0
2022 Q1 3,612 0 0 0.0
2021 Q4 9,363 0 0 0.0
2021 Q3 4,290 0 0 0.0
2021 Q2 3,970 1 0 251.9
2021 Q1 3,508 0 0 0.0
2020 Q4 4,610 0 0 0.0
2020 Q3 10,805 0 0 0.0
2020 Q2 6,978 2 0 286.6
2020 Q1 3,892 0 0 0.0
2019 Q4 4,258 2 0 469.7
2019 Q3 3,896 0 0 0.0
2019 Q2 3,762 0 0 0.0
2019 Q1 3,982 0 0 0.0
2018 Q4 9,440 1 0 105.9
2018 Q3 1,800 0 0 0.0
2018 Q2 1,530 0 0 0.0
2018 Q1 1,782 0 0 0.0
2017 Q4 10,157 0 0 0.0
2017 Q3 4,268 0 0 0.0
2017 Q2 6,254 0 0 0.0
2017 Q1 5,764 2 0 347.0
2016 Q4 3,960 2 0 505.1
2016 Q3 3,734 0 0 0.0
2016 Q2 1,936 1 0 516.5
2016 Q1 2,122 0 0 0.0
2015 Q4 1,230 2 0 1626.0
2015 Q3 1,358 3 1 2209.1
2015 Q2 1,650 0 0 0.0
2015 Q1 1,340 0 0 0.0
2014 Q4 2,562 0 0 0.0
2014 Q3 1,872 0 0 0.0
2014 Q2 1,928 0 0 0.0
2014 Q1 1,663 1 0 601.3
2013 Q4 1,632 0 0 0.0
2013 Q3 2,330 1 1 429.2
2013 Q2 2,462 0 0 0.0
2013 Q1 1,810 0 0 0.0
2012 Q4 1,884 0 0 0.0
2012 Q3 2,120 0 0 0.0
2012 Q2 3,206 2 0 623.8
2012 Q1 2,262 0 0 0.0
2011 Q4 2,733 0 0 0.0
2011 Q3 2,639 0 0 0.0
2011 Q2 3,106 0 0 0.0
2011 Q1 3,212 0 0 0.0
2010 Q4 2,332 0 0 0.0
2010 Q3 1,967 0 0 0.0
2010 Q2 2,267 4 1 1764.4
2010 Q1 1,541 0 0 0.0
2009 Q4 4,428 0 0 0.0
2009 Q3 2,666 0 0 0.0
2009 Q2 2,311 0 0 0.0
2009 Q1 2,311 3 0 1298.1
2008 Q4 2,637 0 0 0.0
2008 Q3 2,351 0 0 0.0
2008 Q2 2,577 0 0 0.0
2008 Q1 1,931 0 0 0.0
2007 Q4 1,915 8 1 4177.5
2007 Q3 2,428 0 0 0.0
2007 Q2 2,206 0 0 0.0
2007 Q1 1,510 0 0 0.0
2006 Q4 1,897 8 1 4217.2
2006 Q3 9,951 0 0 0.0
2006 Q2 6,050 0 0 0.0
2006 Q1 9,911 0 0 0.0
2005 Q4 9,984 1 0 100.2
2005 Q3 14,677 3 1 204.4
2005 Q2 12,737 0 0 0.0
2005 Q1 8,409 2 1 237.8
2004 Q4 11,356 0 0 0.0
2004 Q3 11,409 0 0 0.0
2004 Q2 10,927 0 0 0.0
2004 Q1 7,437 0 0 0.0
2003 Q4 10,031 5 0 498.5
2003 Q3 12,831 0 0 0.0
2003 Q2 10,574 4 0 378.3
2003 Q1 7,087 1 1 141.1
2002 Q4 8,885 0 0 0.0
2002 Q3 11,874 0 0 0.0
2002 Q2 13,642 0 0 0.0
2002 Q1 12,096 5 0 413.4
2001 Q4 10,736 0 0 0.0
2001 Q3 10,740 0 0 0.0
2001 Q2 11,083 4 0 360.9
2001 Q1 5,503 0 0 0.0
2000 Q4 7,655 0 0 0.0
2000 Q3 10,571 0 0 0.0
2000 Q2 11,357 6 2 528.3
2000 Q1 8,974 4 0 445.7
No fatalities recorded at this mine.

Reportable incidents

19 on file

2024 · 1 incident

2023 · 2 incidents

June 7, 2023 IA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Martin Marietta Materials, Inc. · Fall from machine

Employee was loosing a bolt on a hammer attachment mounted to an excavator. Lost EE's balance and fell, fracturing EE's left wrist.

2017 · 2 incidents

August 9, 2017 IA · Metal/Non-Metal electrician, lineman MACHINERY
Martin Marietta Materials, Inc. · Struck by... (Not Elsewhere Classified)

EE was using a cordless drill and a 3/8 drill bit. EE was drilling a hole in a 1/8 inch thick aluminum mounting plate when the drill bit caught causing the drill to grab and twist in EE's hand.

May 25, 2017 IA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer STEPPING OR KNEELING ON OBJECT
Martin Marietta Materials, Inc. · Struck against stationary object

EE stepped on a board and twisted EE's ankle. After being seen at the doctor's office it was determined that a bone in EE's ankle was broken resulting in restricted duty.

2005 · 1 incident

July 18, 2005 IA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Martin Marietta Aggregates · Struck against a moving object

EE claims that the brakes failed at the top of the slope leading into the pit. EE was on his way to get his 9th load of the night. EE had conducted pre-shift on the haul unit. The vehicle str4uck the highwall as he attempted to negotiate a curve and ramp leading out of the pit.EE received a laceration to left forehead area and was hospitalized.

2003 · 1 incident

February 19, 2003 IA · Metal/Non-Metal truck driver POWERED HAULAGE
Martin Marietta Aggregates · Caught in, under or between running or meshing objects

EE WAS GREASING NEW PLANT WHEN START UP ALARMS WENT OFF. EE WHO WAS NOT LOCKED OUT, WAS STANDING ON A CONVEYOR WHEN IT STARTED. THE EE WAS KNOCKED DOWN AND CARRIED INTO A CHUTE WHERE HE EXITE D AN 8 1/2"X 30"OPENING ONTO ANOTHER BELT. HE WAS SEEN BY CO-WORKERS AND THE BELT WAS STOPPED.EE SUFFERED BRUISES AND A BROKEN LEFT ARM. EE CLAIMED IT WOULD TAKE TOO MUCH TIME TO LOTO TO

2002 · 3 incidents

November 12, 2002 IA · Metal/Non-Metal truck driver SLIP OR FALL OF PERSON
Martin Marietta Aggregates · Fall from machine

EMPLOYEE WAS EXITING HIS MACK TRUCK WHEN HIS RIGHT FOOT SLIPPED OFF THE TRUCK STEP. THE EE FELL TO THE GROUND, TWISTING HIS RIGHT ANKLE IN THE PROCESS. EE WALKED TO A NEARBY CONTROL HOUSE BEFORE HE NOTICED SWELLING IN HIS RIGHT ANKLE. X RAY EXAMINATION REVEALED THE ANKLE WAS BROKEN.

November 7, 2002 IA · Metal/Non-Metal truck driver HANDLING OF MATERIALS
Martin Marietta Aggregates · Caught in, under or between a moving and a stationary object

EE WAS STANDING AT EMPLOYEE BUILDING DOORWAY WITH HIS LEFT HAND ON THE DOOR JAM. A CO-WORKER ENTERED THE BUILDING THROUGH THE DOOR AND THE EE'S LEFT LITTLE FINGER SLIPPED INTO THE HINGE AND WA S PINCHED OFF AS THE DOOR SLAMMED SHUT. LEFT LITTLE FINGER TIP WAS CRUSHED OFF TO THE FIRST KNUCKLE.

October 28, 2002 IA · Metal/Non-Metal drill helper SLIP OR FALL OF PERSON
Martin Marietta Aggregates · Fall from machine

EE WAS CLIMBING ONTO LOADER. HIS LEFT FOOT WAS ON A STEP AND HIS HANDS ON THE HANDRAILS. HIS LEFT HAND SLIPPED FROM THE HAND RAIL CAUSING HIM TO FALL BACKWARD ONTO HIS RIGHT FOOT TWISTING HIS BACK. INITIAL CHIROPRACTIC DIAGNOSIS FROM EE'S PRIVATED DR. INDICATED COMPRESSED DISKS. FURTHER MEDICAL EXAMINATION DISPORVES THIS INITIAL DIAGNOSIS.

2000 · 1 incident

June 24, 2000 IA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech ELECTRICAL
Martin Marietta Aggregates · Contact with electrical current

DURING THE MORNING WORKPLACE INSPECTION A GROUND FAULT WAS DETECTED IN THE PRIMARY CRUSHER TOWER SYSTEM. IN THE TROUBLE SHOOTING THE PROBLEM THE EMPLOYEE NEGLECTED TO FULLY LOCK OUT ALL POWER SOURCES AND RECEIVED AN ELECTRICAL SHOCK AND BURN TO HIS RIGHT MIDDLE FINGER. HE WAS PULLED FREE OF THE POWER SOURCE AND TAKEN DIRECTLY TO A HOSPITAL.

1999 · 1 incident

July 15, 1999 IA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDTOOLS (NONPOWERED)
Martin Marietta Aggregates · Struck by... (Not Elsewhere Classified)

EMPLOYEE WAS USING A SLEDGE HAMMER TO POUND IN MILL PIN IN A HAMMER MILL. HE SWUNG AT THE PIN AND MISSED, PINCHING HIS FINGERS BETWEEN THE PIN AND THE SLEDGE HAMMER HANDLE. HE LACERATED THE TW O OUTSIDE FINGERS ON HIS RIGHT HAND AND FRACTURED HIS RIGHT LITTLE FINGER.

1997 · 1 incident

November 24, 1997 IA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Martin Marietta Aggregates · Struck against a moving object

EMPLOYEE WAS HAULING MUD FROMA REA OF PRIMARY CRUHER. THE MUDDY MATERIAL SLID TO THE REAR OF THE CAB 1 UNIT AS THE NIT STARTED UP THE RAMP. THE UNIT PROCEEDED TO TIP STRAIGHT UP AND LANDED O N IT'S TAIL GATE. BY RAISING THE BOX THE EMPLOYEE RIGHTED THE UNIT. HE SUFFERED A SLIGHT CONCUSSION FROM HITTING HIS HEAD ON AN UNKNOWN OBJECT.

1995 · 1 incident

August 3, 1995 IA · Metal/Non-Metal mine manager, mine foreman, mine owner HANDLING OF MATERIALS
Martin Marietta Aggregates · Caught in, under or between a moving and a stationary object

EE WAS MOVING A RAILROAD TIE INTO POSITION IN SETTING DOWN THE TIE HE CAUGHT HIS LEFT HAND RING FINGER BETWEEN THE RAILROAD TIE HE WAS MOVING AND OUR THAT WAS ALREADY IN POSITION. THE END OF H IS FINGER WAS SPLIT OPEN AND FRACTURED.

1993 · 1 incident

July 15, 1993 IA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Martin Marietta Aggregates · Struck against stationary object

EMPLOYEE WAS ATTEMPTING TO OPEN VENT WINDOW ON A STOCK PILE TRUCK. THE LOCKING DEVICE ON THE WINDOW WAS RUSTED AND UPON TRYING TO LOOSEN AND MOVE IT, THE LOCK BROKE OFF LEAVING A SHARP POINT. THE EMPLOYEE'S ARM CONTINUED THROUGH THE WINDOW ACROSS THE BROKEN REMAINS. THE RESULTING ARM LACERATION REQUIRED 13 STITCHES.

1986 · 1 incident

November 3, 1986 IA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Martin Marietta Aggregates · Fall onto or against objects

EMPLOYEE WAS CL9ANING MUD OUT OF THE CHUTE AT TRANSFER POINT BETWEEN #2 AND #3 CONVEYORS SIGNALS WERE MISINTERPETED AND BELT WAS STARTED WHILE EMPLOYEE WAS GOING TO CLIMB DOWN BRUISES TO LEFT SHOULDER BLADE 2 BROKEN RIBS AND A BRUISED LUNG WERE THE INJURIES

1985 · 3 incidents

December 11, 1985 IA · Metal/Non-Metal blaster, shooter, shotfirer, explosive worker, powder gang/monkey HANDTOOLS (NONPOWERED)
Martin Marietta Aggregates · Struck by flying object

EMPLOYEE WAS RE4OVING WEDGES IN PREPARATION TO CHANGE SCREENS WEDGE CAME OUT OF PIN GOING UNDER SAFETY GLASSES AND STRIKING HIS LEFT EYE AND CUTTING HIS NOSE

September 28, 1985 IA · Metal/Non-Metal outside foreman, leadman SLIP OR FALL OF PERSON
Martin Marietta Aggregates · Fall from machine

TWO EMPLOYEES WERE REPAIRING WASH PLANT IN A VERY CONFINED AREA MEN DECIDED THAT ONE WOULD WELD FOR A PERIOD OF TIME IN TIGHT AREA THEN THEY WOULD CHANGE JOBS I.NAME WELDED FIRST & GOT OUT T O CHANGE WITH OTHER EMPLOYEE OTHER EMPLOYEE REMOVED HIS COAT & HANDED IT TO I.NAME I.NAME TURNED TO PLACE COAT IN AN OUT OF THE WAY PLACE & MISSTEPPED RESULTING IN A FALL OF 12 TO 15 FT TO GR

February 8, 1985 IA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Martin Marietta Aggregates · Caught in, under or between a moving and a stationary object

EMPLOYEE HAD DUMPED LOAD OF MATERIAL. A ROCK HAD STUCK IN THE TAILGATE LATCH WHILE THE EMPLOYEE WAS REMOVING THE ROCK. THE TAILGATE SWUNG SHUT PINCHING OFF THE THUMBNAIL ON HIS RIGHT THUMB