Mining Incidents

Plant #34: 9 MSHA citations Metal/Non-Metal

Onalaska, La Crosse County, WI  ·  Intermittent
MSHA Mine ID: 4702646

Plant #34 has $922 in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
9
Years on record
1996–2025
Latest incident
Mar 2025
Compliance record
MSHA citations since 2002
9
citations
1
significant & substantial
$922
proposed penalties
$922
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
32
inspections on record
233
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: 233 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Plant #34 has $922 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.
$922
proposed penalties
$922
current assessed
$922
paid to date
$0
outstanding
9 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-04-01.
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.
11.1%
significant & substantial
0.0%
high negligence or reckless
11.1%
reasonably likely or greater
44.4%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 11.1% low, 88.9% moderate, 0.0% 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: 2025-11-13
0%
of limit-tested samples over the exposure limit
7
samples
1
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg6
  • Nuisance dust, respirable, <1% Qtz1
Show the individual readings (7)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-11-13 Respirable dust, <.1mg 0 Front-end Loader Operator
2025-04-02 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-10-04 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-10-14 Respirable dust, <.1mg 0 Washer Operator
2017-04-25 Respirable dust, <.1mg 0 Washer Operator
2009-04-15 Respirable dust, <.1mg 0 Front-end Loader Operator
2002-07-10 Nuisance dust, respirable, <1% Qtz 1.12 10 0.11 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.
Ownership history
  1. Arthur Overgaard Inc 1980 to 1989
  2. Milestone Materials Div/Mathy Construction Co 1989 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 1
2025 1
2024 1
2023 1
2022 1
2021 2
2020 2
2019 2
2018 2
2017 2
2016 2
2015 2
2014 1
2013 1
2012 2
2011 3
2010 2
2009 3
2008 2
2007 5
2006 3
2005 2
2004 2
2003 3
2002 4
2001 3
2000 2
Source: MSHA quarterly employment and production, updated weekly.

Plant #34 sits in La Crosse 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.
La Crosse County, Wisconsin · Population 120,262
0.0%
Mining share of county employment
$70,704
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 881 0 0 0.0
2026 Q1 13 0 0 0.0
2025 Q4 709 0 0 0.0
2025 Q3 913 0 0 0.0
2025 Q2 934 1 0 1070.7
2025 Q1 144 0 0 0.0
2024 Q4 698 0 0 0.0
2024 Q3 873 0 0 0.0
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 1,020 0 0 0.0
2024 Q1 131 0 0 0.0
2023 Q4 721 0 0 0.0
2023 Q3 976 0 0 0.0
2023 Q2 1,236 0 0 0.0
2023 Q1 61 0 0 0.0
2022 Q4 380 0 0 0.0
2022 Q3 1,041 0 0 0.0
2022 Q2 1,581 0 0 0.0
2022 Q1 309 0 0 0.0
2021 Q4 1,390 0 0 0.0
2021 Q3 1,405 0 0 0.0
2021 Q2 1,658 0 0 0.0
2021 Q1 131 0 0 0.0
2020 Q4 1,109 0 0 0.0
2020 Q3 1,474 0 0 0.0
2020 Q2 1,344 0 0 0.0
2020 Q1 352 0 0 0.0
2019 Q4 857 0 0 0.0
2019 Q3 1,691 0 0 0.0
2019 Q2 1,296 0 0 0.0
2019 Q1 89 0 0 0.0
2018 Q4 813 0 0 0.0
2018 Q3 1,381 0 0 0.0
2018 Q2 1,297 0 0 0.0
2018 Q1 440 0 0 0.0
2017 Q4 937 1 0 1067.2
2017 Q3 1,453 0 0 0.0
2017 Q2 1,666 0 0 0.0
2017 Q1 1 0 0 0.0
2016 Q4 992 0 0 0.0
2016 Q3 1,160 0 0 0.0
2016 Q2 1,480 0 0 0.0
2016 Q1 1 0 0 0.0
2015 Q4 1,791 0 0 0.0
2015 Q3 1,640 0 0 0.0
2015 Q2 1,601 0 0 0.0
2015 Q1 152 0 0 0.0
2014 Q4 383 0 0 0.0
2014 Q3 1,107 0 0 0.0
2014 Q2 1,195 0 0 0.0
2014 Q1 1 0 0 0.0
2013 Q4 727 0 0 0.0
2013 Q3 1,132 0 0 0.0
2013 Q2 1,037 0 0 0.0
2013 Q1 1 0 0 0.0
2012 Q4 432 1 0 2314.8
2012 Q3 1,425 0 0 0.0
2012 Q2 1,371 0 0 0.0
2012 Q1 185 0 0 0.0
2011 Q4 2,568 0 0 0.0
2011 Q3 2,883 0 0 0.0
2011 Q2 2,595 2 0 770.7
2011 Q1 1 0 0 0.0
2010 Q4 763 0 0 0.0
2010 Q3 2,391 1 0 418.2
2010 Q2 1,486 0 0 0.0
2010 Q1 205 0 0 0.0
2009 Q4 2,247 0 0 0.0
2009 Q3 2,685 0 0 0.0
2009 Q2 2,188 0 0 0.0
2009 Q1 725 0 0 0.0
2008 Q4 1,492 0 0 0.0
2008 Q3 1,949 0 0 0.0
2008 Q2 2,052 0 0 0.0
2008 Q1 1 0 0 0.0
2007 Q4 3,421 2 1 584.6
2007 Q3 4,742 0 0 0.0
2007 Q2 4,287 0 0 0.0
2007 Q1 360 0 0 0.0
2006 Q4 2,390 0 0 0.0
2006 Q3 3,294 0 0 0.0
2006 Q2 2,658 0 0 0.0
2006 Q1 472 0 0 0.0
2005 Q4 1,237 0 0 0.0
2005 Q3 1,837 0 0 0.0
2005 Q2 2,063 0 0 0.0
2005 Q1 1 0 0 0.0
2004 Q4 1,168 0 0 0.0
2004 Q3 2,070 0 0 0.0
2004 Q2 2,189 0 0 0.0
2004 Q1 1 0 0 0.0
2003 Q4 1,994 0 0 0.0
2003 Q3 2,320 0 0 0.0
2003 Q2 4,418 0 0 0.0
2003 Q1 821 0 0 0.0
2002 Q4 4,437 1 0 225.4
2002 Q3 6,698 0 0 0.0
2002 Q2 692 0 0 0.0
2002 Q1 1 0 0 0.0
2001 Q4 1,920 0 0 0.0
2001 Q3 3,614 0 0 0.0
2001 Q2 2,123 0 0 0.0
2001 Q1 50 0 0 0.0
2000 Q4 1,234 0 0 0.0
2000 Q3 661 0 0 0.0
2000 Q2 1,762 0 0 0.0
2000 Q1 407 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

9 on file

2025 · 1 incident

March 26, 2025 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Caught in, under or between a moving and a stationary object

EE was installing a tire on equipment when their middle finger got caught between the snap wire and the rim flange causing an injury and cut on the right middle finger.

2011 · 1 incident

June 24, 2011 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Caught in, under or between a moving and a stationary object

While moving rock around metal culvert pipe, rock rolled back towards pipe pinching finger between the rock and the pipe.

2003 · 1 incident

August 16, 2003 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)

EE WAS HELPING TO PUT A BEARING ON A SHAFT. WHEN THEY BEGAN TO STRIKE A PUNCH WITH A HAMMER A FRAGMENT FLEW OFF THE PUNCH. THE FRAGMENT STRUCK EE'S BICEP AND EMBEDDED.

2000 · 1 incident

1999 · 2 incidents

December 3, 1999 WI · Metal/Non-Metal beltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor rider POWERED HAULAGE
Milestone Materials Div/Mathy Construction Co · Fall to the walkway or working surface

AN IRON DEFLECTOR CAME OFF THE END OF THE CONVEYOR, CAUGHT DAYS SLEEVE AND CAUSED HIM TO FALL TO THE GROUND, LANDING ON HIS LEFT SHOULDER.

1998 · 2 incidents

April 22, 1998 WI · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Caught in, under or between a moving and a stationary object

WHILE LOADING SCRAP METAL INTO THE LOADER BUCKET WITH OTHER EE ON THE OTHER END, EE INDICATED HE SMASHED HIS FINGER BETWEEN LOADER BUCKET AND SCRAP.

1996 · 1 incident

June 10, 1996 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Milestone Materials Div/Mathy Construction Co · Caught in, under or between a moving and a stationary object

WORKER WAS ATTEMPTING TO REMOVE A LARGE ROCK FROM THE FEEDER BIN, WHEN HIS THUMB WAS PINCHED BETWEEN THE ROCK AND METAL FRAME.