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: 497 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Pedersen Quarry has $9K 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.
$9K
proposed penalties
$9K
current assessed
$9K
paid to date
$0
outstanding
78 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2022-03-24.
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: 2025-10-02
0%
of limit-tested samples over the exposure limit
14
samples
7
limit-tested
Most sampled contaminants
Nuisance dust, respirable, <1% Qtz7
Respirable dust, <.1mg6
Quartz, respirable, >1% Qtz1
Show the individual readings (14)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-10-02
Quartz, respirable, >1% Qtz
0.31
Crusher Oper/Worker
2025-10-02
Respirable dust, <.1mg
0
Truck Driver
2017-07-06
Respirable dust, <.1mg
0
Utility Man
2017-07-06
Respirable dust, <.1mg
0
Front-end Loader Operator
2017-07-06
Respirable dust, <.1mg
0
Front-end Loader Operator
2012-03-22
Respirable dust, <.1mg
0
Front-end Loader Operator
2006-09-06
Nuisance dust, respirable, <1% Qtz
0.12
10
0.01
Truck Driver
2006-09-06
Nuisance dust, respirable, <1% Qtz
0.21
10
0.02
Crusher Oper/Worker
2006-09-06
Nuisance dust, respirable, <1% Qtz
0.45
10
0.05
Front-end Loader Operator
2004-06-03
Nuisance dust, respirable, <1% Qtz
0.59
10
0.06
Crusher Oper/Worker
2004-06-03
Nuisance dust, respirable, <1% Qtz
0.2
10
0.02
Laborer, Bullgang
2004-06-03
Nuisance dust, respirable, <1% Qtz
0.47
10
0.05
Laborer, Bullgang
2004-06-03
Respirable dust, <.1mg
0
Laborer, Bullgang
2004-06-03
Nuisance dust, respirable, <1% Qtz
0.44
10
0.04
Laborer, Bullgang
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.
Pedersen 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 Iowa, metal and nonmetal mining averaged 2.62 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
2021 *
0.00
0.00
0.000
2020 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2014 *
0.00
0.00
0.000
2013 *
0.00
0.00
0.000
2012 *
9.10
9.10
0.000
2011 *
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
9
2025
8
2024
9
2023
10
2022
8
2021
8
2020
9
2019
12
2018
9
2017
4
2016
6
2015
9
2014
9
2013
10
2012
11
2011
16
2010
12
2009
12
2008
11
2007
11
2006
10
2005
11
2004
11
2003
11
2002
10
2001
9
2000
11
Source: MSHA quarterly employment and production, updated weekly.
Pedersen Quarry sits in Humboldt County, Iowa, where the Census mining category is 0.3% 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.
Humboldt County, Iowa · Population 9,573
0.3%
Mining share of county employment
$66,994
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
Employee was operating the skid loader and it made contact with an overhead conveyor. ROPES dislodged and came down and landed on the employee's left leg causing a break to his fibula bone.
2008 · 1 incident
November 24, 2008IA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
Employee was doing routine winter maintenance on a skid loader. Employee raised the radiator to access the winter engine heater and the hydraulic cylinder that holds the radiator up malfunctioned. This allowed the radiator to drop and pinched the employee's left hand. Employee received 6 stitches on the top of his left hand and has a fractured left thumb.
2007 · 1 incident
June 13, 2007IA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
Employee was walking to the office and tripped on a rock. He put his hand out to break his fall and landed on his right knuckles resulting in a fractured bone.
2004 · 2 incidents
September 23, 2004IA · Metal/Non-Metalcoal/ore shovel operator, shoveler, power shovelerOTHER
audiological testing STS - possible recordable. Retest scheduled for 9/23 -- awaiting result. (10/4/04 review of 9/23 report: retest shows hearing loss not confirmed.)
audiological testing STS - possible recordable. Retest scheduled for 9/23 -- awaiting result. (10/4/04 review of 9/23 report: retest shows hearing loss not confirmed.)
EE WAS CUTTING A 6" EATER PUMPER RUBBER HOSE WITH HIS PERSONAL KNIFE. THE EE WAS PULLING THE KNIFE TOWARD HIMSELF WHEN IT SLIPPED AND STABBED HIS LEFT KNEE.
EE EXITED OFFICE TO GET MAIL SLIPPED ON ICE IN FRONT OF OFFICE & LANDED ON HER BACK. APPARENTLY SHE HIT HER HEAD BECAUSE SHE SUFFRED A SLIGHT CONCUSSION
1999 · 1 incident
May 7, 1999IA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDTOOLS (NONPOWERED)
EE WAS WORKING ON HEAD PULLY THAT WAS STANDING ON END. ON THE TOP END OF THIS HEAD PULLY HE HADLAID A SLEDGE HAMMER. THE HEAD PULLEY STARTED TOTIP OVER THE EE GRABBED FOR IT AND AS THE HAMMER SLID OVER ON THE END OF THE HEAD PULLEY & STRUCKHIS THUMB
1997 · 2 incidents
July 31, 1997IA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
DRILL OPERATOR WAS GOING TO HOOK ROTOR HEAD TO CORE BARREL WHE HE BUMPED ROTER LEVER AND THE CORE BARREL DROPPED ON THE EMPLOYEE HAND. EMPLOYEE DID NOT HAVE ON GLOVES.
1996 · 2 incidents
October 26, 1996IA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDLING OF MATERIALS
HE WAS RUNNING CRUSHER A LARGE ROCK PLUGGED IT UP. HE REACHED UP TO PULL IT OUT AND ROCKS BEHIND IT CAME DOWN AND INJURED HAND.
February 15, 1996IA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS