Mining Incidents

Mobile Crusher Unit: 15 MSHA citations Metal/Non-Metal

A-1 Materials Inc · Surface
Controlled by Terri Stelter
Bloomer - Portable, Chippewa County, WI  ·  Abandoned
MSHA Mine ID: 4702960

Mobile Crusher Unit has $1K 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
8
Years on record
1993–2008
Latest incident
Jun 2008
Compliance record
MSHA citations since 2001
15
citations
2
significant & substantial
$1,104
proposed penalties
$1,104
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
15
inspections on record
177
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: 177 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Mobile Crusher Unit has $1K 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.
$1K
proposed penalties
$1K
current assessed
$1K
paid to date
$0
outstanding
15 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2010-11-02.
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.
13.3%
significant & substantial
0.0%
high negligence or reckless
13.3%
reasonably likely or greater
53.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 13.3% low, 86.7% 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: 2010-06-22, 16 years ago
0%
of limit-tested samples over the exposure limit
9
samples
2
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg5
  • Quartz, respirable, >1% Qtz2
  • Unlisted Particulate, respirable, <1% Qtz2
Show the individual readings (9)
Date Contaminant Concentration Limit Conc / limit Occupation
2010-06-22 Quartz, respirable, >1% Qtz 0.28 0.39 0.72 Crusher Oper/Worker
2004-12-01 Respirable dust, <.1mg 0 Crusher Oper/Worker
2004-12-01 Respirable dust, <.1mg 0 Front-end Loader Operator
2002-10-29 Unlisted Particulate, respirable, <1% Qtz 0.4 Front-end Loader Operator
2002-10-29 Unlisted Particulate, respirable, <1% Qtz 0.15 Front-end Loader Operator
2002-10-29 Quartz, respirable, >1% Qtz 0.35 1.96 0.18 Crusher Oper/Worker
2001-05-01 Respirable dust, <.1mg 0 Front-end Loader Operator
2001-05-01 Respirable dust, <.1mg 0 Crusher Oper/Worker
2001-05-01 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.
Ownership history
  1. A-1 Materials Inc 1992 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2012 5
2011 4
2010 3
2009 3
2008 3
2007 3
2006 3
2005 5
2004 4
2003 3
2002 4
2001 5
2000 5
Source: MSHA quarterly employment and production, updated weekly.

Mobile Crusher Unit sits in Chippewa County, Wisconsin, where the Census mining category is 0.3% 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.
Chippewa County, Wisconsin · Population 66,558
0.3%
Mining share of county employment
$74,009
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
2012 Q4 2,638 0 0 0.0
2012 Q3 3,322 0 0 0.0
2012 Q2 2,916 0 0 0.0
2012 Q1 327 0 0 0.0
2011 Q4 2,513 0 0 0.0
2011 Q3 3,614 0 0 0.0
2011 Q2 2,826 0 0 0.0
2011 Q1 1 0 0 0.0
Show 44 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2010 Q4 1,690 1 0 591.7
2010 Q3 2,123 0 0 0.0
2010 Q2 2,414 1 0 414.3
2010 Q1 1 0 0 0.0
2009 Q4 2,040 0 0 0.0
2009 Q3 2,034 1 0 491.6
2009 Q2 2,342 0 0 0.0
2009 Q1 1 0 0 0.0
2008 Q4 1,635 0 0 0.0
2008 Q3 1,826 0 0 0.0
2008 Q2 1,487 0 0 0.0
2008 Q1 1 0 0 0.0
2007 Q4 1,403 0 0 0.0
2007 Q3 1,795 0 0 0.0
2007 Q2 1,836 0 0 0.0
2007 Q1 1 0 0 0.0
2006 Q4 1,573 1 0 635.7
2006 Q3 2,172 0 0 0.0
2006 Q2 2,557 0 0 0.0
2006 Q1 1 0 0 0.0
2005 Q4 1,950 0 0 0.0
2005 Q3 3,330 0 0 0.0
2005 Q2 3,832 0 0 0.0
2005 Q1 319 0 0 0.0
2004 Q4 2,666 1 0 375.1
2004 Q3 2,556 0 0 0.0
2004 Q2 2,618 0 0 0.0
2004 Q1 1 0 0 0.0
2003 Q4 2,317 0 0 0.0
2003 Q3 2,969 0 0 0.0
2003 Q2 2,934 0 0 0.0
2003 Q1 0 0 0
2002 Q4 2,567 2 0 779.1
2002 Q3 3,851 0 0 0.0
2002 Q2 3,819 2 0 523.7
2002 Q1 1 0 0 0.0
2001 Q4 3,881 0 0 0.0
2001 Q3 4,395 0 0 0.0
2001 Q2 2,686 6 2 2233.8
2001 Q1 1 0 0 0.0
2000 Q4 1,825 0 0 0.0
2000 Q3 3,225 0 0 0.0
2000 Q2 2,667 0 0 0.0
2000 Q1 263 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

8 on file

2008 · 1 incident

June 5, 2008 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
A-1 Materials Inc · Over-exertion (Not Elsewhere Classified)

Changing belts on feed hopper - pulled muscle in lower back.

2003 · 1 incident

July 16, 2003 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
A-1 Materials Inc · Struck by... (Not Elsewhere Classified)

WORKING ON DOZER AND HWY 124-HOLDING BOLT ON CUTTING EDGE ON THE DOZER BOLT SPUN AND CUT LEFT THUMB-TENDONS SURGERY ON 7-17-03.

2000 · 2 incidents

September 29, 2000 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
A-1 Materials Inc · Over-exertion in lifting objects

SLIDING A CULVERT PULLED MUSCLES IN LOWER BACK.

March 24, 2000 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
A-1 Materials Inc · Struck by flying object

ROCK FLEW OUT OF BREAKER AND HIT ARM.

1995 · 1 incident

May 23, 1995 WI · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor HANDLING OF MATERIALS
A-1 Materials Inc · Struck by falling object

DROPPED A PIECE OF ANGLE IRON ON FINGER. RIGHT POINTER FINGER - STITCHES.

1994 · 2 incidents

July 14, 1994 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
A-1 Materials Inc · Struck by falling object

SETTING UP EQUIPMENT AND ACYLINDER FELL OUT OF POCKET, FELL AND HIT EE IN FOREHEAD EE WAS WEARING HARDHAT.

May 10, 1994 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
A-1 Materials Inc · Struck against stationary object

BADLY BRUISED LEFT ARM.

1993 · 1 incident

September 22, 1993 WI · Metal/Non-Metal mine manager, mine foreman, mine owner HANDTOOLS (NONPOWERED)
A-1 Materials Inc · Struck by... (Not Elsewhere Classified)

CUTTING CONVEYOR BELT WITH AN UTILITY KNIFE--SLIPPED, CUT LEG-- REC'D ABOUT 6 STITCHES.