NORDBERG has $18K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
5
Years on record
1983–2007
Latest incident
Jan 2007
Compliance record
MSHA citations since 2000
122
citations
21
significant & substantial
$18,148
proposed penalties
$17,716
paid to date
98% of proposed penalties paid to date, a $432 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
43
inspections on record
560
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: 560 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
NORDBERG has $18K in proposed MSHA penalties and $0 outstanding across 1 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.
$18K
proposed penalties
$18K
current assessed
$18K
paid to date
$0
outstanding
122 assessments are final orders; 1 contested dockets.
Of $540 in penalties contested before the Commission, $108 was upheld in final decisions.
As of the most recent assessment on 2026-04-08.
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.
1citations taken to the federal commission · 1% of citations on record
Settled
1 · 100%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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%
80%
Penalty reduction in decided contests
$540 proposed, $108 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 2011-12-20.
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: 2026-04-09
0%
of limit-tested samples over the exposure limit
8
samples
3
limit-tested
Most sampled contaminants
Respirable dust, <.1mg5
Nuisance dust, respirable, <1% Qtz2
Nuisance dust, total, <1% Qtz1
Show the individual readings (8)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-04-09
Respirable dust, <.1mg
0
Crusher Oper/Worker
2026-04-09
Respirable dust, <.1mg
0
Utility Man
2018-07-18
Respirable dust, <.1mg
0
Front-end Loader Operator
2018-07-18
Nuisance dust, total, <1% Qtz
1.94
10
0.19
Cleanup Man
2018-07-18
Respirable dust, <.1mg
0
Front-end Loader Operator
2010-06-29
Respirable dust, <.1mg
0
Supervisor, Co. Official
2002-12-04
Nuisance dust, respirable, <1% Qtz
0.49
10
0.05
Dry Screen Plant Operator
2002-12-04
Nuisance dust, respirable, <1% Qtz
0.33
10
0.03
Dry Screen Plant 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.
Southern Wisconsin Aggregate Corporation2019 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
1
2025
1
2024
2
2023
2
2022
2
2021
1
2020
2
2019
2
2018
5
2017
3
2016
3
2015
3
2014
3
2013
5
2012
5
2011
4
2010
4
2009
4
2008
4
2007
5
2006
4
2005
5
2004
3
2003
5
2002
4
2001
6
2000
5
Source: MSHA quarterly employment and production, updated weekly.
NORDBERG sits in Rock County, Wisconsin, where the Census mining category is 0.1% 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.
Rock County, Wisconsin · Population 163,944
0.1%
Mining share of county employment
$74,390
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
745
4
0
5369.1
2026 Q1
0
0
0
2025 Q4
0
0
0
2025 Q3
0
0
0
2025 Q2
40
6
1
150000.0
2025 Q1
536
0
0
0.0
2024 Q4
445
0
0
0.0
2024 Q3
472
2
0
4237.3
Show 97 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
658
0
0
0.0
2024 Q1
0
0
0
2023 Q4
857
0
0
0.0
2023 Q3
909
0
0
0.0
2023 Q2
760
10
1
13157.9
2023 Q1
0
0
0
2022 Q4
758
0
0
0.0
2022 Q3
778
0
0
0.0
2022 Q2
836
3
0
3588.5
2022 Q1
87
0
0
0.0
2021 Q4
394
0
0
0.0
2021 Q3
777
0
0
0.0
2021 Q2
707
2
1
2828.9
2021 Q1
0
0
0
2020 Q4
402
0
0
0.0
2020 Q3
671
2
2
2980.6
2020 Q2
490
4
2
8163.3
2020 Q1
0
0
0
2019 Q4
707
0
0
0.0
2019 Q2
472
0
0
0.0
2019 Q1
365
0
0
0.0
2018 Q4
1,766
0
0
0.0
2018 Q3
3,780
5
1
1322.8
2018 Q2
2,486
0
0
0.0
2018 Q1
155
0
0
0.0
2017 Q4
661
0
0
0.0
2017 Q3
546
2
0
3663.0
2017 Q2
930
0
0
0.0
2017 Q1
212
0
0
0.0
2016 Q4
610
0
0
0.0
2016 Q3
986
0
0
0.0
2016 Q2
868
8
1
9216.6
2016 Q1
40
0
0
0.0
2015 Q4
522
0
0
0.0
2015 Q3
648
4
0
6172.8
2015 Q2
565
0
0
0.0
2015 Q1
163
0
0
0.0
2014 Q4
1,114
0
0
0.0
2014 Q3
1,530
0
0
0.0
2014 Q2
1,308
3
2
2293.6
2014 Q1
0
0
0
2013 Q4
871
0
0
0.0
2013 Q3
2,096
0
0
0.0
2013 Q2
1,069
0
0
0.0
2013 Q1
1
0
0
0.0
2012 Q4
1,466
4
0
2728.5
2012 Q3
1,737
0
0
0.0
2012 Q2
1,800
0
0
0.0
2012 Q1
119
0
0
0.0
2011 Q4
855
8
0
9356.7
2011 Q3
1,231
0
0
0.0
2011 Q2
463
0
0
0.0
2011 Q1
1
0
0
0.0
2010 Q4
554
9
1
16245.5
2010 Q3
1,158
0
0
0.0
2010 Q2
962
5
2
5197.5
2010 Q1
1
0
0
0.0
2009 Q4
708
0
0
0.0
2009 Q3
1,556
0
0
0.0
2009 Q2
661
0
0
0.0
2009 Q1
1
0
0
0.0
2008 Q4
667
3
0
4497.8
2008 Q3
1,604
0
0
0.0
2008 Q2
1,094
0
0
0.0
2008 Q1
1
0
0
0.0
2007 Q4
972
2
0
2057.6
2007 Q3
1,271
0
0
0.0
2007 Q2
1,073
0
0
0.0
2007 Q1
303
0
0
0.0
2006 Q4
213
3
0
14084.5
2006 Q3
1,438
0
0
0.0
2006 Q2
1,273
0
0
0.0
2006 Q1
1
0
0
0.0
2005 Q4
1,227
1
0
815.0
2005 Q3
1,999
0
0
0.0
2005 Q2
1,306
3
0
2297.1
2005 Q1
152
0
0
0.0
2004 Q4
1,326
0
0
0.0
2004 Q3
1,267
0
0
0.0
2004 Q2
862
0
0
0.0
2004 Q1
0
0
0
2003 Q4
1,200
3
0
2500.0
2003 Q3
1,376
0
0
0.0
2003 Q2
1,241
0
0
0.0
2003 Q1
531
0
0
0.0
2002 Q4
1,325
2
0
1509.4
2002 Q3
1,724
6
1
3480.3
2002 Q2
698
0
0
0.0
2002 Q1
354
0
0
0.0
2001 Q4
1,558
5
0
3209.2
2001 Q3
1,299
5
4
3849.1
2001 Q2
1,086
0
0
0.0
2001 Q1
0
0
0
2000 Q4
1,011
0
0
0.0
2000 Q3
1,142
3
2
2627.0
2000 Q2
1,182
0
0
0.0
2000 Q1
16
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
5 on file
2007 · 1 incident
January 8, 2007WI · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
Changing screens in a screening plant. He threw the old screen into a bucket of a loader and it got caught on his glove. It slid down his leg and cut through his pants and cut his leg. He went to Mercy Clinic East, Janesville and received 9 stitches.
WHILE LOADING A SHOT (TEMPERATURE WAS 95 DEGREES), THE EE COMPLAINED OF NAUSEA, AND OTHER SIGNS OF HEATSTROKE. THE LOCATION MANAGER WAS NOT MADE AWARE OF THIS INCIDENT UNTIL 6-16-95, THE DRIVE R WAS THEN SENT TO THE DOCTOR.
1987 · 2 incidents
March 9, 1987WI · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSTEPPING OR KNEELING ON OBJECT
WHILE WORKING F2R I NAME HAD PART OF MACHINE SPIN OFF HITTING HIM ON RIGHT FLANK,HAS CONTINUED SORENESS.NO BLOOD IN URINE,NO COUGHING.
1983 · 1 incident
November 17, 1983WI · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
CRUSHER WAS BEING DISMANTLED FOR MOVING. HE WAS TAKING APART AIR STACK AND GETTING CHAIN ON GROUND. HE MISJUDGED A STEP WHEN ATTEMPTING TO CRAWL DOWN THE CRUSHER AND FELL ABOUT 12FT TO THE GR OUND.
Related mines
Other mines operated by Southern Wisconsin Aggregate Corporation