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: 508 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
PLANT #854 has $4K 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.
$4K
proposed penalties
$4K
current assessed
$4K
paid to date
$0
outstanding
36 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2020-10-21.
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.
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: 2025-02-04
0%
of limit-tested samples over the exposure limit
19
samples
4
limit-tested
Most sampled contaminants
Respirable dust, <.1mg12
Quartz, respirable, >1% Qtz5
Nuisance dust, respirable, <1% Qtz2
Show the individual readings (19)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-02-04
Quartz, respirable, >1% Qtz
0.18
Truck Driver
2025-02-04
Respirable dust, <.1mg
0
Bulldozer Operator
2024-01-24
Respirable dust, <.1mg
0
Truck Driver
2024-01-24
Respirable dust, <.1mg
0
Bulldozer Operator
2023-01-05
Respirable dust, <.1mg
0
Truck Driver
2023-01-05
Respirable dust, <.1mg
0
Bulldozer Operator
2022-01-05
Quartz, respirable, >1% Qtz
0.14
Bulldozer Operator
2022-01-05
Quartz, respirable, >1% Qtz
0.22
Truck Driver
2020-10-21
Quartz, respirable, >1% Qtz
0.26
0.69
0.38
Bulldozer Operator
2020-10-21
Respirable dust, <.1mg
0
Truck Driver
2017-11-15
Respirable dust, <.1mg
0
Bulldozer Operator
2017-11-15
Respirable dust, <.1mg
0
Truck Driver
2012-08-14
Nuisance dust, respirable, <1% Qtz
0.37
10
0.04
Backhoe Operator
2012-08-14
Respirable dust, <.1mg
0
Bulldozer Operator
2012-08-14
Nuisance dust, respirable, <1% Qtz
0.3
10
0.03
Truck Driver
2009-03-04
Respirable dust, <.1mg
0
Truck Driver
2009-03-04
Respirable dust, <.1mg
0
Backhoe Operator
2009-03-04
Quartz, respirable, >1% Qtz
0.16
0.85
0.19
Truck Driver
2009-03-04
Respirable dust, <.1mg
0
Bulldozer 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.
PLANT #854 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 *
0.00
0.00
0.000
2006 *
0.00
0.00
0.000
2005 *
10.50
5.25
0.000
2004 *
6.23
6.23
0.000
2003 *
0.00
0.00
0.000
2002 *
7.42
0.00
0.000
2001 *
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
7
2025
7
2024
8
2023
8
2022
7
2021
6
2020
6
2019
6
2018
5
2017
6
2016
5
2015
4
2014
4
2013
3
2012
3
2011
3
2010
4
2009
7
2008
7
2007
6
2006
9
2005
14
2004
13
2003
14
2002
13
2001
13
2000
14
Source: MSHA quarterly employment and production, updated weekly.
PLANT #854 sits in Polk County, Iowa, where the Census mining category is 0.0% 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.
Polk County, Iowa · Population 497,441
0.0%
Mining share of county employment
$81,621
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
3,264
0
0
0.0
2026 Q1
5,756
0
0
0.0
2025 Q4
3,689
0
0
0.0
2025 Q3
3,227
0
0
0.0
2025 Q2
5,360
0
0
0.0
2025 Q1
3,605
0
0
0.0
2024 Q4
5,589
0
0
0.0
2024 Q3
6,216
0
0
0.0
Show 98 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
3,898
0
0
0.0
2024 Q1
4,751
0
0
0.0
2023 Q4
5,810
0
0
0.0
2023 Q3
5,480
0
0
0.0
2023 Q2
5,680
0
0
0.0
2023 Q1
5,072
0
0
0.0
2022 Q4
5,504
0
0
0.0
2022 Q3
5,484
0
0
0.0
2022 Q2
4,249
0
0
0.0
2022 Q1
3,987
0
0
0.0
2021 Q4
4,371
0
0
0.0
2021 Q3
3,977
0
0
0.0
2021 Q2
2,801
0
0
0.0
2021 Q1
2,801
0
0
0.0
2020 Q4
4,220
1
0
237.0
2020 Q3
4,086
0
0
0.0
2020 Q2
3,852
0
0
0.0
2020 Q1
3,908
0
0
0.0
2019 Q4
3,396
0
0
0.0
2019 Q3
3,526
0
0
0.0
2019 Q2
3,353
3
0
894.7
2019 Q1
3,907
0
0
0.0
2018 Q4
3,447
0
0
0.0
2018 Q3
3,160
0
0
0.0
2018 Q2
3,414
0
0
0.0
2018 Q1
2,890
0
0
0.0
2017 Q4
3,585
0
0
0.0
2017 Q3
3,308
0
0
0.0
2017 Q2
3,548
1
0
281.8
2017 Q1
3,988
0
0
0.0
2016 Q4
3,857
0
0
0.0
2016 Q3
3,884
0
0
0.0
2016 Q2
4,194
0
0
0.0
2016 Q1
3,475
0
0
0.0
2015 Q4
4,060
0
0
0.0
2015 Q3
0
0
0
2015 Q2
3,599
0
0
0.0
2015 Q1
3,186
1
0
313.9
2014 Q4
3,519
0
0
0.0
2014 Q3
2,876
0
0
0.0
2014 Q2
1,333
0
0
0.0
2014 Q1
1,857
0
0
0.0
2013 Q4
2,160
2
0
925.9
2013 Q3
1,589
0
0
0.0
2013 Q2
2,034
0
0
0.0
2013 Q1
759
1
0
1317.5
2012 Q4
926
0
0
0.0
2012 Q3
2,093
2
0
955.6
2012 Q2
2,248
0
0
0.0
2012 Q1
2,054
0
0
0.0
2011 Q4
2,083
0
0
0.0
2011 Q3
2,292
0
0
0.0
2011 Q2
2,964
0
0
0.0
2011 Q1
2,669
0
0
0.0
2010 Q4
2,315
1
0
432.0
2010 Q3
2,061
0
0
0.0
2010 Q2
2,328
0
0
0.0
2010 Q1
1,773
1
0
564.0
2009 Q4
2,751
0
0
0.0
2009 Q3
4,281
0
0
0.0
2009 Q2
3,421
0
0
0.0
2009 Q1
3,155
1
0
317.0
2008 Q4
3,372
0
0
0.0
2008 Q3
4,428
0
0
0.0
2008 Q2
5,180
0
0
0.0
2008 Q1
4,545
0
0
0.0
2007 Q4
4,003
1
0
249.8
2007 Q3
4,067
0
0
0.0
2007 Q2
4,372
0
0
0.0
2007 Q1
2,916
0
0
0.0
2006 Q4
3,668
0
0
0.0
2006 Q3
3,624
0
0
0.0
2006 Q2
5,180
0
0
0.0
2006 Q1
9,660
3
0
310.6
2005 Q4
9,145
0
0
0.0
2005 Q3
9,851
0
0
0.0
2005 Q2
9,848
0
0
0.0
2005 Q1
9,257
8
3
864.2
2004 Q4
9,670
0
0
0.0
2004 Q3
8,055
0
0
0.0
2004 Q2
7,591
1
0
131.7
2004 Q1
6,771
0
0
0.0
2003 Q4
6,403
0
0
0.0
2003 Q3
7,750
0
0
0.0
2003 Q2
6,615
0
0
0.0
2003 Q1
5,876
3
0
510.6
2002 Q4
5,587
0
0
0.0
2002 Q3
6,203
0
0
0.0
2002 Q2
8,314
2
0
240.6
2002 Q1
6,846
0
0
0.0
2001 Q4
5,472
0
0
0.0
2001 Q3
7,158
0
0
0.0
2001 Q2
7,164
2
1
279.2
2001 Q1
5,162
0
0
0.0
2000 Q4
4,838
0
0
0.0
2000 Q3
7,626
0
0
0.0
2000 Q2
8,381
0
0
0.0
2000 Q1
6,501
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
13 on file
2013 · 1 incident
September 28, 2013IA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON
EE was operating the D8 dozer, the weather was raining and drizzling, the side windows had a lot of mud built up and needed cleaned off. EE had just finished cleaning the last window and was stepping out and around the door of the dozer when he lost his footing and fell off of the cat walk. As he was slipping he pushed himself and fell to the ground.
The injured employee was stepping out of his piece of equipment, while maintaining three points of contact he stepped down on a rut, which gave away as he stepped down and caused him to roll his ankle.
2005 · 2 incidents
May 9, 2005IA · Metal/Non-Metalcoal/ore shovel operator, shoveler, power shovelerHANDTOOLS (NONPOWERED)
Employee was removing the teeth on a backhoe bucket using a hammer. A metal fragment broke off and entered the employee's left shoulder requiring a physician to remove it.
EE was surveying area and slipped on ice while walking down a slope. Initial diagnosis was knee sprain. EE continued to have problems with knee. Later determination was ligament damage. Physical therapy was attempted to avoid surgery. EE had orthoscopic surgery on 5/24/05 and returned to full duty on 6/29/05.
2004 · 1 incident
October 14, 2004IA · Metal/Non-Metalassayer, geologist, metallurgist, engineer, engineer managementSLIP OR FALL OF PERSON
EE STEPPED DOWN OFF OF A D8 CAT ONTO THE GROUND. AS HE WAS WALKING AWAY, THE EE STEPPED ONTO THE RIDGE OF DIRT LEFT BY THE WHEEL TRACKS AND ROLLED HIS FOOT OVER CAUSING HIM TO FALL TO THE GROUND.
EMPLOYEE WAS OPERATING A CATERPILLER, PUSHING DIRT AT A STRIPPING OPERATION. THE UNIT ROCKED OVER AND OUTCROPPING, CAUSING THE EMPLOYEE TO STRIKE HIS HEAD ON A REAR-VIEW MIRROR.
1998 · 1 incident
October 22, 1998IA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerMACHINERY
EE WAS CLEANING MUD OUT FROM TRACKS WHEN SPADE BROKE THROUGH IMPACTED AREA CAUSING EE TO STRIKE THE END OF HIS LITTLE FINGER ON THE EDGE OF A TRACK PAD. THE IMPACT BROKE THE TIP OF THE LITTLE FINGER AND TO THE NAIL LOOSE
1997 · 1 incident
January 20, 1997IA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
EMPLOYEE WAS BREAKING A RAIL APART ON A D8N DOZER. IN LIFTING THE MASTER PAD FROM THE RAIL TOLOWER IT TO THE GROUND EMPLOYEE DROPPED THE PAD 3' ANDHIT HIS LEFT FOOT.
1996 · 1 incident
April 12, 1996IA · Metal/Non-Metalcoal/ore shovel operator, shoveler, power shovelerSLIP OR FALL OF PERSON
EE WAS HELPING MECHANIC WORK ON A BACKHOE. WHEN MECHANIC ASKED EE TO START THE BACKHOE, EE WALKED ON OIL-COVERED CATWALK, SLIPPED AND CAUGHT HIMSELF INJURING HIS RIGHT SHOULDER.
1991 · 1 incident
December 18, 1991IA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON
EMPL PLACING A BLOCK UNDER TRACK OF DOZER FOR SUPPORT.THE TRACK SHIFTED AND HAND WAS BETWEEN THE BLOCK AND TRACK AND AMPUTATED 1/2" TIP OFF LEFT THUMB.
1986 · 1 incident
February 21, 1986IA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON
THE OPERATOR WA8 DISMOUNTING THE CATAPILLER STEPPED ON RAIL WHICH WAS COVERED WITH FROST AND SNOW HE SLIPPED ON FROST AND FELL TO THE GROUND HIS LEFT HAND CAME INTO CONTACT WITH A FROZEN CHUNK OF DIRT THIS CA6SED A FRACTURE TO THE 4TH METACARPAL OF HIS LEFT HAND
Related mines
Other mines operated by Martin Marietta Materials Inc