Mountain Stone Works LLC has $15K in proposed MSHA penalties and $0 outstanding across 2 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
8
Years on record
1992–2014
Latest incident
Jun 2014
Compliance record
MSHA citations since 2000
66
citations
12
significant & substantial
$14,655
proposed penalties
$12,655
paid to date
86% of proposed penalties paid to date, a $2,000 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
42
inspections on record
508
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: 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.
Mountain Stone Works LLC has $15K in proposed MSHA penalties and $0 outstanding across 2 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.
$15K
proposed penalties
$13K
current assessed
$13K
paid to date
$0
outstanding
66 assessments are final orders; 2 contested dockets.
Of $7K in penalties contested before the Commission, $5K was upheld in final decisions.
As of the most recent assessment on 2025-08-12.
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.
9citations taken to the federal commission · 14% of citations on record
Settled
9 · 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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 3 decided S&S contests · industry: 79%
30%
Penalty reduction in decided contests
$7K proposed, $5K 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 2011-07-29.
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: 2019-08-06, 7 years ago
3
samples
0
limit-tested
Most sampled contaminants
Respirable dust, <.1mg2
Quartz, respirable, >1% Qtz1
Show the individual readings (3)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2019-08-06
Quartz, respirable, >1% Qtz
0.23
Front-end Loader Operator
2019-08-06
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-08-06
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
3
2025
4
2024
3
2023
3
2022
2
2021
1
2020
3
2019
2
2018
3
2017
3
2016
2
2015
3
2014
3
2013
4
2012
4
2011
4
2010
5
2009
5
2008
4
2007
5
2006
5
2005
5
2004
7
2003
6
2002
7
2001
7
2000
8
Source: MSHA quarterly employment and production, updated weekly.
Mountain Stone Works LLC sits in Oconto County, Wisconsin, 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.
Oconto County, Wisconsin · Population 39,329
0.0%
Mining share of county employment
$75,886
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
600
0
0
0.0
2026 Q1
48
0
0
0.0
2025 Q4
280
0
0
0.0
2025 Q3
519
6
0
11560.7
2025 Q2
569
0
0
0.0
2025 Q1
62
0
0
0.0
2024 Q4
440
0
0
0.0
2024 Q3
1,150
4
0
3478.3
Show 97 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
1,323
0
0
0.0
2024 Q1
40
0
0
0.0
2023 Q4
40
0
0
0.0
2023 Q3
2,560
0
0
0.0
2023 Q2
80
8
1
100000.0
2023 Q1
0
0
0
2022 Q4
40
0
0
0.0
2022 Q3
40
3
0
75000.0
2022 Q2
40
0
0
0.0
2022 Q1
40
0
0
0.0
2021 Q3
1,194
0
0
0.0
2021 Q2
985
1
1
1015.2
2021 Q1
0
0
0
2020 Q4
1,099
0
0
0.0
2020 Q3
1,221
3
0
2457.0
2020 Q2
1,282
0
0
0.0
2020 Q1
0
0
0
2019 Q4
1,525
0
0
0.0
2019 Q3
1,680
5
0
2976.2
2019 Q2
753
0
0
0.0
2019 Q1
0
0
0
2018 Q4
833
0
0
0.0
2018 Q3
1,693
2
0
1181.3
2018 Q2
973
0
0
0.0
2018 Q1
0
0
0
2017 Q4
898
0
0
0.0
2017 Q3
2,473
0
0
0.0
2017 Q2
1,185
0
0
0.0
2017 Q1
0
0
0
2016 Q4
733
0
0
0.0
2016 Q3
1,616
0
0
0.0
2016 Q2
1,216
0
0
0.0
2016 Q1
0
0
0
2015 Q4
917
2
0
2181.0
2015 Q3
1,066
1
0
938.1
2015 Q2
1,377
5
0
3631.1
2015 Q1
83
0
0
0.0
2014 Q4
160
0
0
0.0
2014 Q3
1,507
1
0
663.6
2014 Q2
740
0
0
0.0
2014 Q1
30
0
0
0.0
2013 Q4
485
0
0
0.0
2013 Q3
2,382
0
0
0.0
2013 Q2
850
0
0
0.0
2013 Q1
35
0
0
0.0
2012 Q4
335
0
0
0.0
2012 Q3
2,300
3
0
1304.3
2012 Q2
1,010
0
0
0.0
2012 Q1
57
0
0
0.0
2011 Q4
445
0
0
0.0
2011 Q3
2,240
0
0
0.0
2011 Q2
980
9
3
9183.7
2011 Q1
40
0
0
0.0
2010 Q4
1,020
0
0
0.0
2010 Q3
2,560
1
1
390.6
2010 Q2
1,428
0
0
0.0
2010 Q1
897
0
0
0.0
2009 Q4
1,768
0
0
0.0
2009 Q3
3,289
1
1
304.0
2009 Q2
1,946
0
0
0.0
2009 Q1
192
0
0
0.0
2008 Q4
906
0
0
0.0
2008 Q3
3,325
1
1
300.8
2008 Q2
2,393
2
0
835.8
2008 Q1
128
0
0
0.0
2007 Q4
1,490
0
0
0.0
2007 Q3
5,051
0
0
0.0
2007 Q2
4,203
2
1
475.9
2007 Q1
602
0
0
0.0
2006 Q4
1,768
0
0
0.0
2006 Q3
5,218
0
0
0.0
2006 Q2
4,072
0
0
0.0
2006 Q1
683
0
0
0.0
2005 Q4
1,728
0
0
0.0
2005 Q3
4,070
0
0
0.0
2005 Q2
3,685
2
1
542.7
2005 Q1
632
0
0
0.0
2004 Q4
2,185
0
0
0.0
2004 Q3
6,279
1
1
159.3
2004 Q2
4,411
0
0
0.0
2004 Q1
600
0
0
0.0
2003 Q4
2,510
0
0
0.0
2003 Q3
5,122
1
0
195.2
2003 Q2
4,218
0
0
0.0
2003 Q1
256
0
0
0.0
2002 Q4
2,722
0
0
0.0
2002 Q3
5,424
0
0
0.0
2002 Q2
4,316
0
0
0.0
2002 Q1
660
0
0
0.0
2001 Q4
3,313
0
0
0.0
2001 Q3
4,725
0
0
0.0
2001 Q2
4,301
0
0
0.0
2001 Q1
638
0
0
0.0
2000 Q4
3,957
0
0
0.0
2000 Q3
4,284
2
1
466.9
2000 Q2
6,493
0
0
0.0
2000 Q1
1,172
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
8 on file
2014 · 1 incident
June 10, 2014WI · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON
The miner was doing routine maintenance on the screen plant which required him to be on a ladder to check for excessive heat. While doing this the ladder shifted and the miner fell breaking his left wrist. The miner was three and a half feet up on the ladder when the fall happened. He was transported to a hospital and received medical attention for his injury.
2004 · 1 incident
May 11, 2004WI · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDTOOLS (NONPOWERED)
HE WAS GREASING VIB FEEDER AND STEPPED BACK AWAYFROM FEEDER, STEPPED ON SOMETHING AND SPRAINED HIS RIGHT ANKLE. WAS NOT REPORTED UNTIL 6/18 AND THEN SENT TO CLINIC FOR EXAM.
1999 · 1 incident
March 31, 1999WI · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
CHANGING TIRE WITH IMPACK WRENCH. STUCK FINGER IN SOCKET TO TAKE OUT LUGNUT. BUMPED TRIGGER ON IMPACT WRENCH. WRENCH STARTED AND THREADED NUT ONTO FINGER.
1996 · 1 incident
September 12, 1996WI · Metal/Non-Metalbeltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor riderHANDLING OF MATERIALS