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: 770 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Oakfield Quarry has $31K 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.
$31K
proposed penalties
$30K
current assessed
$30K
paid to date
$0
outstanding
104 assessments are final orders; 4 contested dockets.
Of $17K in penalties contested before the Commission, $16K was upheld in final decisions.
As of the most recent assessment on 2026-01-15.
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.
22citations taken to the federal commission · 21% of citations on record
Settled
22 · 100%
100%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 10 decided S&S contests · industry: 79%
5%
Penalty reduction in decided contests
$19K proposed, $18K 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2011-10-13.
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: 2019-02-21, 7 years ago
0%
of limit-tested samples over the exposure limit
6
samples
3
limit-tested
Most sampled contaminants
Nuisance dust, respirable, <1% Qtz3
Quartz, respirable, >1% Qtz2
Respirable dust, <.1mg1
Show the individual readings (6)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2019-02-21
Nuisance dust, respirable, <1% Qtz
0.18
10
0.02
Washer Operator
2019-02-21
Quartz, respirable, >1% Qtz
0.36
Washer Operator
2019-02-21
Quartz, respirable, >1% Qtz
0.37
Washer Operator
2014-04-02
Nuisance dust, respirable, <1% Qtz
0.52
10
0.05
Stone Polisher/Cutter
2014-04-02
Nuisance dust, respirable, <1% Qtz
0.14
10
0.01
Stone Polisher/Cutter
2014-04-02
Respirable dust, <.1mg
0
Front-end Loader 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.
Oakfield Quarry recorded 6.96 reportable injury cases per 100 full-time workers in 2007.
Injury rate, 2007
ⓘ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.
6.96
total case rate
0.00
days-away rate
0.000
fatality rate
Above average. The US metal and nonmetal mining average was 3.30 and the all-US-mining average was 3.77 cases per 100 workers.
In Wisconsin, metal and nonmetal mining averaged 6.10 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
2007 *
6.96
0.00
0.000
2006 *
0.00
0.00
0.000
2002 *
0.00
0.00
0.000
2001 *
9.57
9.57
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
3
2025
4
2024
5
2023
5
2022
4
2021
5
2020
7
2019
8
2018
7
2017
7
2016
8
2015
9
2014
8
2013
7
2012
5
2011
4
2010
6
2009
9
2008
14
2007
17
2006
13
2005
10
2004
10
2003
11
2002
12
2001
12
2000
14
Source: MSHA quarterly employment and production, updated weekly.
Oakfield Quarry sits in Fond du Lac County, Wisconsin, 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.
Fond du Lac County, Wisconsin · Population 104,053
0.2%
Mining share of county employment
$73,154
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
709
0
0
0.0
2026 Q1
48
2
0
41666.7
2025 Q4
80
0
0
0.0
2025 Q3
1,012
0
0
0.0
2025 Q2
1,332
2
1
1501.5
2025 Q1
580
0
0
0.0
2024 Q4
2,125
0
0
0.0
2024 Q3
2,478
0
0
0.0
Show 98 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
1,916
0
0
0.0
2024 Q1
2,050
1
0
487.8
2023 Q4
2,339
0
0
0.0
2023 Q3
2,404
0
0
0.0
2023 Q2
1,507
5
0
3317.9
2023 Q1
1,228
0
0
0.0
2022 Q4
976
0
0
0.0
2022 Q3
90
0
0
0.0
2022 Q2
965
2
1
2072.5
2022 Q1
1,986
0
0
0.0
2021 Q4
2,157
0
0
0.0
2021 Q3
2,918
0
0
0.0
2021 Q2
2,243
0
0
0.0
2021 Q1
1,618
0
0
0.0
2020 Q4
1,142
4
1
3502.6
2020 Q3
3,090
4
0
1294.5
2020 Q2
3,349
0
0
0.0
2020 Q1
1,567
0
0
0.0
2019 Q4
3,785
0
0
0.0
2019 Q3
3,233
3
1
927.9
2019 Q2
4,432
0
0
0.0
2019 Q1
2,987
3
1
1004.4
2018 Q4
4,181
0
0
0.0
2018 Q3
3,886
0
0
0.0
2018 Q2
3,312
1
0
301.9
2018 Q1
2,124
0
0
0.0
2017 Q4
3,356
3
0
893.9
2017 Q3
3,224
0
0
0.0
2017 Q2
3,147
4
1
1271.1
2017 Q1
2,624
0
0
0.0
2016 Q4
3,048
4
0
1312.3
2016 Q3
3,953
0
0
0.0
2016 Q2
3,257
2
1
614.1
2016 Q1
2,390
0
0
0.0
2015 Q4
3,772
5
0
1325.6
2015 Q3
4,131
1
0
242.1
2015 Q2
4,119
0
0
0.0
2015 Q1
2,607
0
0
0.0
2014 Q4
3,888
0
0
0.0
2014 Q3
4,262
0
0
0.0
2014 Q2
3,735
1
0
267.7
2014 Q1
1,868
5
0
2676.7
2013 Q4
3,288
0
0
0.0
2013 Q3
3,379
0
0
0.0
2013 Q2
3,500
0
0
0.0
2013 Q1
1,860
0
0
0.0
2012 Q4
2,950
3
1
1016.9
2012 Q3
2,913
0
0
0.0
2012 Q2
2,568
0
0
0.0
2012 Q1
901
0
0
0.0
2011 Q4
1,494
0
0
0.0
2011 Q3
1,675
9
4
5373.1
2011 Q2
960
0
0
0.0
2011 Q1
433
0
0
0.0
2010 Q4
2,257
0
0
0.0
2010 Q3
2,541
0
0
0.0
2010 Q2
3,611
0
0
0.0
2010 Q1
1,418
0
0
0.0
2009 Q4
2,042
0
0
0.0
2009 Q3
3,534
0
0
0.0
2009 Q2
4,580
10
3
2183.4
2009 Q1
1,392
3
2
2155.2
2008 Q4
4,199
0
0
0.0
2008 Q3
5,682
1
0
176.0
2008 Q2
7,563
0
0
0.0
2008 Q1
1,380
1
0
724.6
2007 Q4
7,491
0
0
0.0
2007 Q3
8,197
0
0
0.0
2007 Q2
9,359
0
0
0.0
2007 Q1
3,697
5
1
1352.4
2006 Q4
6,244
0
0
0.0
2006 Q3
7,532
0
0
0.0
2006 Q2
7,440
2
1
268.8
2006 Q1
4,590
0
0
0.0
2005 Q4
4,527
0
0
0.0
2005 Q3
5,614
0
0
0.0
2005 Q2
5,055
2
0
395.6
2005 Q1
3,075
0
0
0.0
2004 Q4
4,393
0
0
0.0
2004 Q3
5,428
3
2
552.7
2004 Q2
5,324
0
0
0.0
2004 Q1
2,103
0
0
0.0
2003 Q4
5,042
0
0
0.0
2003 Q3
5,594
0
0
0.0
2003 Q2
5,425
9
2
1659.0
2003 Q1
2,933
0
0
0.0
2002 Q4
5,545
0
0
0.0
2002 Q3
7,620
0
0
0.0
2002 Q2
6,054
0
0
0.0
2002 Q1
2,780
2
0
719.4
2001 Q4
5,183
0
0
0.0
2001 Q3
7,181
2
0
278.5
2001 Q2
5,995
0
0
0.0
2001 Q1
2,550
0
0
0.0
2000 Q4
4,120
0
0
0.0
2000 Q3
6,595
0
0
0.0
2000 Q2
6,737
0
0
0.0
2000 Q1
2,151
1
0
464.9
No fatalities recorded at this mine.
Reportable incidents
27 on file
2021 · 2 incidents
April 21, 2021WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
Employee says EE bent over and heard something pop in EE's back. EE was not lifting anything at the time. Employee had mentioned prior to start of workday that EE's back hurt per another EE.
2015 · 1 incident
November 11, 2015WI · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON
Employee was exiting the haul truck when his right foot got caught on the last step & mud flap. He fell to the ground with his ankle still caught in the mud flap. He has a closed fracture of right wrist & sprain of right ankle.
2009 · 2 incidents
July 6, 2009WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
Quarry worker did not report initial injury till 7/23/09. He states he felt sharp pain pushing stone onto rollers. He was also told he needs to report right away, he also knows this from his MSHA training. He did not say much when asked why he did not report it immediately.
July 1, 2009WI · Metal/Non-Metalstone finishing and sizing personnel, stone/rock cut/polish/saw operator, splitter, cutter, trimmerHANDLING OF MATERIALS
HE WAS TAKING CUT STONE FROM GUILLOTINE AND STACKING ONTO A PALLET. A STONE WAS PUSHED THROUGH AND CAUGHT HIS THUMB BETWEEN TWO PIECES OF STONE AND CAUSED THE LEFT THUMB TO BREAK OPEN.
March 17, 1992WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
HE WAS CATCHING STONE (FROM CUTTING MACHINE) WHEN HE BENT DOWN & A PIECE OF STONE FLEW & CAME OVER THE TOP OF HIS SAFETY GLASSES & SDCRATCHED THE PUPLE
March 28, 1991WI · Metal/Non-Metalledgeman/hand, quarry manMACHINERY