Mining Incidents

Plant #29: 26 MSHA citations Metal/Non-Metal

Onalaska, La Crosse County, WI  ·  Intermittent
MSHA Mine ID: 4703059

Plant #29 has $3K 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
13
Years on record
1995–2010
Latest incident
May 2010
Compliance record
MSHA citations since 2001
26
citations
5
significant & substantial
$3,061
proposed penalties
$3,061
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
34
inspections on record
334
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: 334 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 #29 has $3K 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.
$3K
proposed penalties
$3K
current assessed
$3K
paid to date
$0
outstanding
26 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2024-02-29.
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.
19.2%
significant & substantial
0.0%
high negligence or reckless
19.2%
reasonably likely or greater
53.8%
permanently disabling or fatal if injury occurs
Negligence coding: 3.8% none, 42.3% low, 53.8% 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: 2025-10-30
0%
of limit-tested samples over the exposure limit
16
samples
6
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg10
  • Quartz, respirable, >1% Qtz5
  • Nuisance dust, respirable, <1% Qtz1
Show the individual readings (16)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-10-30 Respirable dust, <.1mg 0 Crusher Oper/Worker
2025-10-30 Respirable dust, <.1mg 0 Crusher Oper/Worker
2021-03-29 Respirable dust, <.1mg 0 Supervisor, Co. Official
2021-03-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-03-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2017-10-04 Respirable dust, <.1mg 0 Front-end Loader Operator
2017-10-04 Respirable dust, <.1mg 0 Front-end Loader Operator
2017-10-04 Respirable dust, <.1mg 0 Crusher Oper/Worker
2011-04-06 Quartz, respirable, >1% Qtz 0.28 1.16 0.24 Crusher Oper/Worker
2011-04-06 Respirable dust, <.1mg 0 Front-end Loader Operator
2003-05-06 Quartz, respirable, >1% Qtz 0.13 0.6 0.22 Front-end Loader Operator
2003-05-06 Respirable dust, <.1mg 0 Front-end Loader Operator
2003-05-06 Quartz, respirable, >1% Qtz 0.21 1.12 0.19 Crusher Oper/Worker
2001-10-10 Nuisance dust, respirable, <1% Qtz 0.25 10 0.03 Supervisor, Co. Official
2001-10-10 Quartz, respirable, >1% Qtz 0.37 1.2 0.31 Front-end Loader Operator
2001-10-10 Quartz, respirable, >1% Qtz 0.9 1.65 0.55 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.

Plant #29 recorded 0.00 reportable injury cases per 100 full-time workers in 2008.

Injury rate, 2008
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.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 3.15 and the all-US-mining average was 3.61 cases per 100 workers.
In Wisconsin, metal and nonmetal mining averaged 6.75 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
2008 * 0.00 0.00 0.000
2004 * 9.82 9.82 0.000
2003 * 0.00 0.00 0.000
2002 * 0.00 0.00 0.000
2001 * 19.61 0.00 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.
Ownership history
  1. Milestone Materials Division Mathy Construction 1995 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 4
2025 4
2024 4
2023 4
2022 4
2021 4
2020 5
2019 4
2018 4
2017 5
2016 4
2015 4
2014 4
2013 3
2012 5
2011 5
2010 6
2009 4
2008 8
2007 6
2006 5
2005 5
2004 6
2003 8
2002 7
2001 7
2000 5
Source: MSHA quarterly employment and production, updated weekly.

Plant #29 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 2,779 0 0 0.0
2026 Q1 1,954 0 0 0.0
2025 Q4 2,578 0 0 0.0
2025 Q3 5,140 0 0 0.0
2025 Q2 3,796 0 0 0.0
2025 Q1 1,372 0 0 0.0
2024 Q4 2,677 0 0 0.0
2024 Q3 3,793 0 0 0.0
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 3,223 0 0 0.0
2024 Q1 2,718 1 0 367.9
2023 Q4 4,498 0 0 0.0
2023 Q3 3,317 1 0 301.5
2023 Q2 3,458 0 0 0.0
2023 Q1 1,205 0 0 0.0
2022 Q4 2,231 0 0 0.0
2022 Q3 4,798 0 0 0.0
2022 Q2 3,821 0 0 0.0
2022 Q1 538 0 0 0.0
2021 Q4 2,712 0 0 0.0
2021 Q3 3,793 0 0 0.0
2021 Q2 3,641 0 0 0.0
2021 Q1 1,221 1 0 819.0
2020 Q4 2,800 0 0 0.0
2020 Q3 5,233 0 0 0.0
2020 Q2 3,910 0 0 0.0
2020 Q1 2,472 0 0 0.0
2019 Q4 2,875 0 0 0.0
2019 Q3 4,252 0 0 0.0
2019 Q2 4,018 0 0 0.0
2019 Q1 958 0 0 0.0
2018 Q4 2,119 1 0 471.9
2018 Q3 4,011 0 0 0.0
2018 Q2 4,261 0 0 0.0
2018 Q1 0 0 0
2017 Q4 3,743 1 0 267.2
2017 Q3 4,051 2 0 493.7
2017 Q2 5,950 0 0 0.0
2017 Q1 1,076 0 0 0.0
2016 Q4 2,129 0 0 0.0
2016 Q3 3,884 0 0 0.0
2016 Q2 4,398 0 0 0.0
2016 Q1 933 1 0 1071.8
2015 Q4 3,208 0 0 0.0
2015 Q3 4,379 0 0 0.0
2015 Q2 3,871 4 1 1033.3
2015 Q1 1,205 0 0 0.0
2014 Q4 4,099 0 0 0.0
2014 Q3 4,400 3 0 681.8
2014 Q2 3,470 0 0 0.0
2014 Q1 377 0 0 0.0
2013 Q4 2,426 0 0 0.0
2013 Q3 3,147 1 0 317.8
2013 Q2 3,376 0 0 0.0
2013 Q1 233 0 0 0.0
2012 Q4 2,847 0 0 0.0
2012 Q3 4,239 0 0 0.0
2012 Q2 3,960 0 0 0.0
2012 Q1 1,568 0 0 0.0
2011 Q4 2,474 0 0 0.0
2011 Q3 5,663 0 0 0.0
2011 Q2 4,106 1 0 243.5
2011 Q1 2,219 0 0 0.0
2010 Q4 1,902 0 0 0.0
2010 Q3 6,777 0 0 0.0
2010 Q2 6,239 0 0 0.0
2010 Q1 1,666 0 0 0.0
2009 Q4 2,486 1 1 402.3
2009 Q3 4,315 0 0 0.0
2009 Q2 4,471 0 0 0.0
2009 Q1 553 0 0 0.0
2008 Q4 2,477 0 0 0.0
2008 Q3 9,739 0 0 0.0
2008 Q2 6,985 0 0 0.0
2008 Q1 2,022 0 0 0.0
2007 Q4 2,549 0 0 0.0
2007 Q3 5,784 0 0 0.0
2007 Q2 6,610 0 0 0.0
2007 Q1 2,244 0 0 0.0
2006 Q4 2,768 0 0 0.0
2006 Q3 5,378 0 0 0.0
2006 Q2 6,518 1 0 153.4
2006 Q1 1,270 0 0 0.0
2005 Q4 3,429 0 0 0.0
2005 Q3 6,607 0 0 0.0
2005 Q2 1,987 0 0 0.0
2005 Q1 4,013 0 0 0.0
2004 Q4 6,254 0 0 0.0
2004 Q3 6,301 0 0 0.0
2004 Q2 5,798 0 0 0.0
2004 Q1 2,015 0 0 0.0
2003 Q4 4,476 0 0 0.0
2003 Q3 11,177 0 0 0.0
2003 Q2 6,731 1 0 148.6
2003 Q1 2,496 0 0 0.0
2002 Q4 5,228 0 0 0.0
2002 Q3 8,855 0 0 0.0
2002 Q2 8,096 0 0 0.0
2002 Q1 1,036 0 0 0.0
2001 Q4 4,295 2 1 465.7
2001 Q3 5,171 0 0 0.0
2001 Q2 8,112 0 0 0.0
2001 Q1 2,820 0 0 0.0
2000 Q4 2,702 0 0 0.0
2000 Q3 3,337 0 0 0.0
2000 Q2 5,340 0 0 0.0
2000 Q1 2,083 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

13 on file

2010 · 1 incident

2007 · 1 incident

2005 · 1 incident

2004 · 1 incident

2001 · 2 incidents

2000 · 1 incident

July 6, 2000 WI · Metal/Non-Metal assayer, geologist, metallurgist, engineer, engineer management POWERED HAULAGE
Milestone Materials Division Mathy Construction · Struck against a moving object

EE WAS USING A LOADER TO HAUL MATERIAL TO THE BREAKER-HE STRUCK A TOE ON QUARRY FLOOR WITH LOADER BUCKET AND IT THREW HIS HEAD TO THE LEFT AND THEN HE HIT ANOTHER TOE IN THE WALL WHICH CAUSED HIS HEAD TO FLY FORWARD.

1999 · 1 incident

1998 · 2 incidents

August 28, 1998 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Milestone Materials Division Mathy Construction · Caught in, under or between (Not Elsewhere Classified)

EE PINCHED FINGER BETWEEN GUARDRAIL OF CRUSHER AND CHAIN WHILE USING A WEDGE TO DISLODGE A BOULDER

1996 · 2 incidents

May 2, 1996 WI · Metal/Non-Metal assayer, geologist, metallurgist, engineer, engineer management POWERED HAULAGE
Milestone Materials Division Mathy Construction · Struck against stationary object

HOLDING ONE END OF CONVEYOR WHIEL IT WAS BEING MOVED WITH FRONT END LOADER. THE LOADER TRAVELED OVER MATERIAL PILE CAUISN GCONVEYOR TO SWING. APPARENTLY WORKER TRIED TO STEADY CONVEYOR AND T HE PUSH AGAINST SCREEN DECK STRIKIGN HIS HEA DON A MOTOR MOUNT.

April 11, 1996 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Milestone Materials Division Mathy Construction · Over-exertion in lifting objects

EE WAS CHANGING GRIZZLY BARS IN THE JAW OF THE BREAKER MACHINE WHEN HE LIFTED THE GRIZZLY OUT OFTHE JAW EE INDICATES THAT THERE WAS AN IMMEDIATED ONSET OF PAIN.

1995 · 1 incident