Mining Incidents

Crusher #1: 38 MSHA citations Metal/Non-Metal

MT Rock INC. · Surface
Viroqua, Vernon County, WI  ·  Intermittent
MSHA Mine ID: 4703354

Crusher #1 has $6K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

Watch this mine

Email me when a new MSHA incident is filed at Crusher #1.

Fatalities
0
Total incidents
0
Years on record
Latest incident
Compliance record
MSHA citations since 2003
38
citations
6
significant & substantial
$6,123
proposed penalties
$6,123
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2003
37
inspections on record
311
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: 311 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Crusher #1 has $6K 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.
$6K
proposed penalties
$6K
current assessed
$6K
paid to date
$0
outstanding
37 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2019-10-16.
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.
16.2%
significant & substantial
13.5%
high negligence or reckless
16.2%
reasonably likely or greater
43.2%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 10.8% low, 75.7% moderate, 13.5% high, 0.0% reckless.
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: 2021-08-12, 5 years ago
2
samples
0
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg2
Show the individual readings (2)
Date Contaminant Concentration Limit Conc / limit Occupation
2021-08-12 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-08-12 Respirable dust, <.1mg 0 Cleanup Man
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.
Ownership history
  1. MT Rock INC. 2003 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 2
2025 2
2024 1
2023 2
2022 2
2021 2
2020 2
2019 2
2018 2
2017 2
2016 2
2015 2
2014 2
2013 2
2012 2
2011 2
2010 2
2009 2
2008 2
2007 1
2005 1
2004 2
2003 2
Source: MSHA quarterly employment and production, updated weekly.

Crusher #1 sits in Vernon 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.
Vernon County, Wisconsin · Population 30,915
0.1%
Mining share of county employment
$69,556
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 4 0 0 0.0
2026 Q1 6 0 0 0.0
2025 Q4 5 0 0 0.0
2025 Q3 10 0 0 0.0
2025 Q2 4 0 0 0.0
2025 Q1 2 0 0 0.0
2024 Q4 0 0 0
2024 Q3 0 0 0
Show 75 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 8 0 0 0.0
2024 Q1 14 0 0 0.0
2023 Q4 325 0 0 0.0
2023 Q3 610 0 0 0.0
2023 Q2 55 0 0 0.0
2023 Q1 10 0 0 0.0
2022 Q4 310 0 0 0.0
2022 Q3 580 0 0 0.0
2022 Q2 40 0 0 0.0
2021 Q4 300 0 0 0.0
2021 Q3 720 0 0 0.0
2021 Q2 40 0 0 0.0
2021 Q1 10 0 0 0.0
2020 Q4 10 0 0 0.0
2020 Q3 10 0 0 0.0
2020 Q2 10 0 0 0.0
2019 Q3 250 2 0 8000.0
2019 Q2 120 0 0 0.0
2019 Q1 20 0 0 0.0
2018 Q4 5 0 0 0.0
2018 Q3 5 0 0 0.0
2018 Q2 5 0 0 0.0
2018 Q1 20 0 0 0.0
2017 Q4 145 0 0 0.0
2017 Q3 170 0 0 0.0
2017 Q2 85 0 0 0.0
2017 Q1 15 0 0 0.0
2016 Q4 140 0 0 0.0
2016 Q3 245 0 0 0.0
2016 Q2 85 0 0 0.0
2016 Q1 20 0 0 0.0
2015 Q4 85 0 0 0.0
2015 Q3 280 3 0 10714.3
2015 Q2 60 0 0 0.0
2015 Q1 20 0 0 0.0
2014 Q4 160 0 0 0.0
2014 Q3 320 1 0 3125.0
2014 Q2 75 0 0 0.0
2014 Q1 110 0 0 0.0
2013 Q4 240 0 0 0.0
2013 Q3 375 2 0 5333.3
2013 Q2 420 0 0 0.0
2013 Q1 170 0 0 0.0
2012 Q4 320 0 0 0.0
2012 Q3 480 1 0 2083.3
2012 Q2 480 0 0 0.0
2012 Q1 180 0 0 0.0
2011 Q4 460 0 0 0.0
2011 Q3 700 4 0 5714.3
2011 Q2 660 0 0 0.0
2011 Q1 160 0 0 0.0
2010 Q4 560 0 0 0.0
2010 Q3 720 2 1 2777.8
2010 Q2 600 0 0 0.0
2010 Q1 320 1 0 3125.0
2009 Q4 368 0 0 0.0
2009 Q3 360 0 0 0.0
2009 Q2 480 5 3 10416.7
2009 Q1 0 0 0
2008 Q4 480 0 0 0.0
2008 Q3 307 0 0 0.0
2008 Q2 180 0 0 0.0
2008 Q1 0 0 0
2007 Q4 0 3 0
2007 Q3 235 0 0 0.0
2007 Q2 80 7 1 87500.0
2007 Q1 0 0 0
2005 Q2 300 0 0 0.0
2005 Q1 0 0 0
2004 Q4 1,300 0 0 0.0
2004 Q3 1,300 0 0 0.0
2004 Q2 1,256 0 0 0.0
2004 Q1 0 0 0
2003 Q3 1,060 1 1 943.4
2003 Q2 985 0 0 0.0

No reportable incidents on file.

MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.