GREBNER-OLESON PIT has $17K in proposed MSHA penalties and $0 outstanding across 4 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
12
Years on record
1983–2026
Latest incident
May 2026
Compliance record
MSHA citations since 2001
95
citations
10
significant & substantial
$17,346
proposed penalties
$17,346
paid to date
100% of proposed penalties paid to date, a $0 gap.
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: 757 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
GREBNER-OLESON PIT has $17K in proposed MSHA penalties and $0 outstanding across 4 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.
$17K
proposed penalties
$17K
current assessed
$17K
paid to date
$0
outstanding
95 assessments are final orders; 4 contested dockets.
Of $907 in penalties contested before the Commission, $745 was upheld in final decisions.
As of the most recent assessment on 2025-10-20.
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.
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.
5citations taken to the federal commission · 5% of citations on record
Settled
4 · 80%
Vacated or withdrawn
1 · 20%
0%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 1 decided S&S contests · industry: 79%
18%
Penalty reduction in decided contests
$548 proposed, $448 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 2017-05-22.
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.
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: 2025-10-21
0%
of limit-tested samples over the exposure limit
18
samples
6
limit-tested
Most sampled contaminants
Respirable dust, <.1mg12
Nuisance dust, respirable, <1% Qtz5
Nuisance dust, total, <1% Qtz1
Show the individual readings (18)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-10-21
Respirable dust, <.1mg
0
Bulldozer Operator
2025-10-21
Respirable dust, <.1mg
0
Truck Driver
2025-09-30
Respirable dust, <.1mg
0
Crusher Oper/Worker
2025-09-30
Nuisance dust, total, <1% Qtz
0.25
10
0.03
Truck Driver
2025-09-30
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-03-26
Respirable dust, <.1mg
0
Crusher Oper/Worker
2019-03-26
Nuisance dust, respirable, <1% Qtz
0.21
10
0.02
Truck Driver
2019-03-26
Respirable dust, <.1mg
0
Backhoe Operator
2009-05-07
Respirable dust, <.1mg
0
Truck Driver
2009-05-07
Respirable dust, <.1mg
0
Crusher Oper/Worker
2003-01-06
Respirable dust, <.1mg
0
Front-end Loader Operator
2003-01-06
Respirable dust, <.1mg
0
Bulldozer Operator
2003-01-06
Nuisance dust, respirable, <1% Qtz
0.36
10
0.04
Backhoe Operator
2003-01-06
Respirable dust, <.1mg
0
Crusher Oper/Worker
2003-01-06
Nuisance dust, respirable, <1% Qtz
0.3
10
0.03
Truck Driver
2001-06-11
Nuisance dust, respirable, <1% Qtz
0.27
10
0.03
Front-end Loader Operator
2001-06-11
Nuisance dust, respirable, <1% Qtz
0.19
10
0.02
Backhoe Operator
2001-06-11
Respirable dust, <.1mg
0
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.
GREBNER-OLESON PIT 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
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 Iowa, metal and nonmetal mining averaged 1.72 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
2020 *
0.00
0.00
0.000
2019 *
7.49
7.49
0.000
2018 *
7.05
7.05
0.000
2017 *
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
13
2025
12
2024
11
2023
14
2022
13
2021
13
2020
12
2019
13
2018
13
2017
13
2016
13
2015
13
2014
13
2013
11
2012
10
2011
10
2010
10
2009
10
2008
9
2007
11
2006
16
2005
18
2004
18
2003
18
2002
18
2001
20
2000
21
Source: MSHA quarterly employment and production, updated weekly.
GREBNER-OLESON PIT sits in Webster 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.
Webster County, Iowa · Population 36,848
0.6%
Mining share of county employment
$68,054
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
6,268
0
0
0.0
2026 Q1
6,579
0
0
0.0
2025 Q4
6,208
0
0
0.0
2025 Q3
5,795
0
0
0.0
2025 Q2
6,000
0
0
0.0
2025 Q1
5,513
0
0
0.0
2024 Q4
5,138
0
0
0.0
2024 Q3
5,919
0
0
0.0
Show 98 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
5,933
0
0
0.0
2024 Q1
5,165
0
0
0.0
2023 Q4
6,348
0
0
0.0
2023 Q3
7,204
1
0
138.8
2023 Q2
8,035
0
0
0.0
2023 Q1
7,619
0
0
0.0
2022 Q4
6,600
0
0
0.0
2022 Q3
6,816
0
0
0.0
2022 Q2
6,553
0
0
0.0
2022 Q1
5,664
0
0
0.0
2021 Q4
5,863
3
0
511.7
2021 Q3
6,173
1
0
162.0
2021 Q2
1,881
0
0
0.0
2021 Q1
5,759
2
1
347.3
2020 Q4
5,344
0
0
0.0
2020 Q3
5,841
3
1
513.6
2020 Q2
6,047
2
0
330.7
2020 Q1
7,102
0
0
0.0
2019 Q4
6,257
0
0
0.0
2019 Q3
6,944
0
0
0.0
2019 Q2
5,875
0
0
0.0
2019 Q1
7,621
5
0
656.1
2018 Q4
6,669
0
0
0.0
2018 Q3
6,095
2
0
328.1
2018 Q2
8,216
0
0
0.0
2018 Q1
7,395
3
0
405.7
2017 Q4
7,038
0
0
0.0
2017 Q3
5,361
0
0
0.0
2017 Q2
6,503
6
1
922.7
2017 Q1
7,127
5
0
701.6
2016 Q4
6,225
0
0
0.0
2016 Q3
6,067
1
0
164.8
2016 Q2
6,309
0
0
0.0
2016 Q1
5,964
1
0
167.7
2015 Q4
5,686
0
0
0.0
2015 Q3
5,576
0
0
0.0
2015 Q2
5,401
0
0
0.0
2015 Q1
6,529
0
0
0.0
2014 Q4
6,225
0
0
0.0
2014 Q3
6,321
0
0
0.0
2014 Q2
5,895
0
0
0.0
2014 Q1
6,442
0
0
0.0
2013 Q4
5,779
0
0
0.0
2013 Q3
5,423
0
0
0.0
2013 Q2
5,329
5
1
938.3
2013 Q1
4,391
0
0
0.0
2012 Q4
4,372
0
0
0.0
2012 Q3
4,495
0
0
0.0
2012 Q2
3,999
0
0
0.0
2012 Q1
4,387
0
0
0.0
2011 Q4
4,456
1
0
224.4
2011 Q3
3,684
0
0
0.0
2011 Q2
3,444
2
0
580.7
2011 Q1
4,419
0
0
0.0
2010 Q4
3,770
0
0
0.0
2010 Q3
4,179
0
0
0.0
2010 Q2
3,253
0
0
0.0
2010 Q1
5,108
3
0
587.3
2009 Q4
4,317
1
0
231.6
2009 Q3
4,331
0
0
0.0
2009 Q2
3,991
1
0
250.6
2009 Q1
4,377
1
0
228.5
2008 Q4
4,177
0
0
0.0
2008 Q3
4,126
0
0
0.0
2008 Q2
3,823
0
0
0.0
2008 Q1
4,433
0
0
0.0
2007 Q4
3,878
0
0
0.0
2007 Q3
3,930
0
0
0.0
2007 Q2
5,365
0
0
0.0
2007 Q1
6,342
0
0
0.0
2006 Q4
6,809
3
0
440.6
2006 Q3
7,025
0
0
0.0
2006 Q2
6,947
0
0
0.0
2006 Q1
8,274
0
0
0.0
2005 Q4
8,225
0
0
0.0
2005 Q3
8,135
0
0
0.0
2005 Q2
7,587
0
0
0.0
2005 Q1
8,951
0
0
0.0
2004 Q4
8,039
0
0
0.0
2004 Q3
8,235
0
0
0.0
2004 Q2
7,928
0
0
0.0
2004 Q1
8,563
1
0
116.8
2003 Q4
7,796
0
0
0.0
2003 Q3
7,230
0
0
0.0
2003 Q2
7,205
0
0
0.0
2003 Q1
8,389
5
0
596.0
2002 Q4
7,667
0
0
0.0
2002 Q3
7,018
0
0
0.0
2002 Q2
5,962
0
0
0.0
2002 Q1
7,364
2
0
271.6
2001 Q4
8,109
0
0
0.0
2001 Q3
8,335
0
0
0.0
2001 Q2
8,930
0
0
0.0
2001 Q1
9,387
0
0
0.0
2000 Q4
9,253
0
0
0.0
2000 Q3
9,443
0
0
0.0
2000 Q2
9,040
0
0
0.0
2000 Q1
9,777
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
12 on file
2026 · 1 incident
May 1, 2026IA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanSLIP OR FALL OF PERSON
EE was exiting the 980loader in the shop,maintaining 3-points of contact,EE's L foot was on the ground & EEs R foot got stuck in the bottom step.This threw the EE off balance and EE fell backwards and EEs L side landed on a pallet with a cylinder on it.The pallet was approx 10'away from the loader.EE broke 4 ribs on EEs L side from the fall onto the pallet with the cylinder on it.
2024 · 1 incident
August 12, 2024IA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON
Employee had muddy boots, and did not maintain 3 points of contact. Employee slipped and fell to ground while cleaning truck windows. Employee landed on back. Employee injured back.
Associate was shoveling rock off of our 30" silo belt. EE was going to go to break and started walking down the belt. As EE was walking down the belt, EE slipped and fell onto a metal chute. The associate landed on the right side rib cage, breaking four ribs. A contributing factor was that it had started to rain, which caused the belt to become slippery.
Associate was attempting to dispose of an air filter, from a 988 FE Loader, when ee went to lift it into the dumpster ee heard shoulder pop. Upon examination from a doctor it was determined that the injury was a torn rotator cuff requiring surgery to repair.
2003 · 1 incident
December 4, 2003IA · Metal/Non-Metalcoal/ore shovel operator, shoveler, power shovelerSLIP OR FALL OF PERSON
WHILE STEPPING UP INTO A TRACTOR THE EMPLOYEE'S LEFT HAND SLIPPED OFF THE HANDLE AND HE FELL BACKWARDS TO THE SHOP FLOOR. WHILE ATTEMPTING TO CATCH HIMSELF HE INJURED HIS LEFT WRIST.
THE EMPLOYEE WAS IN THE CRUSHER HOPPER ATTEMPTING TO UNPLUG IT. HE WAS PUTTING A CHAIN AROUND A ROCK WHEN THE ROCK SLIPPED PINCHING HIS RIGHT LITTLE FINGER, FRACTURING THE TIP OF THE FINGER.
1999 · 2 incidents
August 10, 1999IA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerPOWERED HAULAGE
EE WAS OPERATING A 16G CAT MOTORGRADER AND WAS HIT HEAD-ON BY ANOTHER EE OPERATING A D400E ADT (OFF THE ROAD) DUMP TRUCK. THE IMPACT CVAUSED FIRST EE TO HAVE TINGLING IN HIS UPPER EXTREMITIES FROM JARRING MOVEMENT OF IMPACT.
THE EE WAS INSIDE A CRUSHER HOPPER TRYING TO MOVE SOME ROCKS AROUND SO THE CRUSHER WOULD RUN. WHILE MOVING THE ROCKS, HE GOT HIS LEFT HAND RING FINGER IN BETWEEN THE ROCK AND THE HOPPER WALL. HE BROKE THE TIP AND HAD A SMALL CUT ON THE FINGER.
1998 · 1 incident
January 22, 1998IA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDTOOLS (NONPOWERED)
THE EE WAS TIGHTENING A NUT WITH A RACHET AND SOCKET WITH ANOTHER EE. THE SOCKET SLIPPED OFF THE NUT AND PINCHED THE EE'S LEFT HAND RING FINGER BETWEEN THE RACHET HANDLE AND A HAND RAIL. THE TIP OF THE FINGER WAS FRACTURED AND THE FINGER NAIL WAS TORN OFF.
1995 · 1 incident
January 9, 1995IA · Metal/Non-Metalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverSLIP OR FALL OF PERSON
RUNG OF LADDER ON TRUCK WAS BENT UNDER, NOT ALLOWING OPERATOR TO PUT FULL FOOT ON RUNG OF LADDER. ALSO, OPERATOR FAILED TO REPORT THE STEP ON THE LADDER AS BEING A POSSIBLE PROBLEM.
1984 · 1 incident
August 17, 1984IA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
EMPLOYEE WAS HELPING CHANGE EDGES ON A SCRAPER. EMPLOYEE WAS USING AN AIR WRENCH & ALLEGEDLY STGRAINED A MUSCLE IN HIS BACK. THE EMPLOYEE DROVE A SCRAPER IN THE AFTERNOON & COMPLAINED OF BACK PAIN. THE EMPLOYEE HAS SEEN MD\S & CHIROPRACTORS IN THE PAST FOR HIS BACK PROBLEMS & HAS A LONG HISTORY OF BACK PROBLEMS.
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