Mining Incidents

Portable Crusher: 158 MSHA citations Metal/Non-Metal

Hollow Contracting Inc · Surface
Controlled by William J Hollow
Butte, Silver Bow County, MT  ·  Intermittent
MSHA Mine ID: 2401986

Portable Crusher has $36K in proposed MSHA penalties and $0 outstanding across 6 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
0
Years on record
Latest incident
Compliance record
MSHA citations since 2000
158
citations
58
significant & substantial
$36,209
proposed penalties
$29,728
paid to date
82% of proposed penalties paid to date, a $6,481 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
41
inspections on record
612
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: 612 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Portable Crusher has $36K in proposed MSHA penalties and $0 outstanding across 6 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.
$36K
proposed penalties
$30K
current assessed
$30K
paid to date
$0
outstanding
157 assessments are final orders; 6 contested dockets.
Of $18K in penalties contested before the Commission, $11K was upheld in final decisions.
As of the most recent assessment on 2025-05-28.
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.
36.7%
significant & substantial
7.6%
high negligence or reckless
36.7%
reasonably likely or greater
56.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 7.0% low, 85.4% moderate, 6.3% high, 1.3% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
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.
Docket Decision Judge Year Proposed / upheld
WEST20030111M Settlement Hodgdon 2003 $10K → $6K
WEST20030019M Settlement Hodgdon 2003 $3K → $2K
WEST20030020M Settlement Hodgdon 2003 $2K → $1K
WEST 2004-158-M Default Lesnick 2004 $2K → $2K
WEST20030158M Settlement Hodgdon 2003 $1K → $600
WEST20030062M Settlement Hodgdon 2003 $55 → $33
Source: FMSHRC civil penalty dockets and decisions (public record), 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: 2018-10-04, 7 years ago
20%
of limit-tested samples over the exposure limit
9
samples
5
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz51 over
  • Respirable dust, <.1mg4
Show the individual readings (9)
Date Contaminant Concentration Limit Conc / limit Occupation
2001-06-21 Quartz, respirable, >1% Qtz 1.53 0.43 3.56 Crusher Oper/Worker
2018-10-04 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-10-04 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-11-03 Quartz, respirable, >1% Qtz 0.33 0.5 0.66 Crusher Oper/Worker
2009-11-03 Respirable dust, <.1mg 0 Front-end Loader Operator
2002-12-18 Quartz, respirable, >1% Qtz 0.23 0.59 0.39 Front-end Loader Operator
2002-12-18 Respirable dust, <.1mg 0 Front-end Loader Operator
2002-12-18 Quartz, respirable, >1% Qtz 0.16 0.31 0.52 Crusher Oper/Worker
2001-06-21 Quartz, respirable, >1% Qtz 0.74 0.76 0.97 Front-end Loader Operator

Area samples (mill and shop air)

Last sampled: 2016-03-23, 10 years ago
1
samples
Show the individual readings (1)
Date Contaminant Concentration Limit Conc / limit Area sampled
2016-03-23 Quartz, respirable, >1% Qtz 0.71 MP DRY SCEENING
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. Hollow Contracting Inc 1992 to present
  2. Montana Materials Llc 1995 to 1998
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 7
2025 3
2024 2
2023 2
2022 1
2021 2
2020 2
2019 2
2018 2
2017 2
2016 2
2015 2
2014 3
2013 2
2012 4
2011 3
2010 3
2009 3
2008 1
2007 1
2006 3
2005 1
2004 1
2003 2
2002 3
2001 2
2000 1
Source: MSHA quarterly employment and production, updated weekly.

Portable Crusher sits in Silver Bow County, Montana, where the Census mining category is 2.4% 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.
Silver Bow County, Montana · Population 35,589
2.4%
Mining share of county employment
$57,504
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 847 0 0 0.0
2026 Q1 346 0 0 0.0
2025 Q4 981 0 0 0.0
2025 Q3 618 0 0 0.0
2025 Q2 2,039 2 1 980.9
2025 Q1 0 0 0
2024 Q4 62 0 0 0.0
2024 Q3 43 0 0 0.0
Show 95 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 232 0 0 0.0
2024 Q1 338 11 0 32544.4
2023 Q4 257 0 0 0.0
2023 Q3 408 0 0 0.0
2023 Q2 170 0 0 0.0
2023 Q1 484 0 0 0.0
2022 Q4 0 0 0
2022 Q3 0 0 0
2022 Q2 218 10 3 45871.6
2022 Q1 0 0 0
2021 Q4 0 0 0
2021 Q3 886 0 0 0.0
2021 Q2 294 0 0 0.0
2021 Q1 99 0 0 0.0
2020 Q4 0 0 0
2020 Q3 660 2 1 3030.3
2020 Q2 157 0 0 0.0
2020 Q1 0 0 0
2019 Q4 275 0 0 0.0
2019 Q3 544 0 0 0.0
2019 Q2 674 0 0 0.0
2019 Q1 314 0 0 0.0
2018 Q4 128 1 0 7812.5
2018 Q3 177 0 0 0.0
2018 Q2 202 0 0 0.0
2018 Q1 169 1 0 5917.2
2017 Q4 764 0 0 0.0
2017 Q3 300 0 0 0.0
2017 Q2 164 0 0 0.0
2017 Q1 171 8 0 46783.6
2016 Q4 0 0 0
2016 Q3 396 0 0 0.0
2016 Q2 606 0 0 0.0
2016 Q1 500 5 1 10000.0
2015 Q4 262 0 0 0.0
2015 Q3 399 0 0 0.0
2015 Q1 777 0 0 0.0
2014 Q4 1,115 0 0 0.0
2014 Q3 816 0 0 0.0
2014 Q2 621 0 0 0.0
2014 Q1 146 5 0 34246.6
2013 Q4 105 0 0 0.0
2013 Q3 209 0 0 0.0
2013 Q2 523 13 1 24856.6
2013 Q1 0 0 0
2012 Q4 507 0 0 0.0
2012 Q3 1,653 0 0 0.0
2012 Q2 704 0 0 0.0
2012 Q1 1,161 6 3 5168.0
2011 Q4 45 2 0 44444.4
2011 Q3 1,276 0 0 0.0
2011 Q2 1,000 3 1 3000.0
2011 Q1 345 0 0 0.0
2010 Q4 669 0 0 0.0
2010 Q3 1,321 0 0 0.0
2010 Q2 146 0 0 0.0
2010 Q1 621 0 0 0.0
2009 Q4 551 12 4 21778.6
2009 Q3 1,278 3 1 2347.4
2009 Q2 363 7 3 19283.7
2009 Q1 248 0 0 0.0
2008 Q4 105 0 0 0.0
2008 Q3 0 0 0
2008 Q2 0 0 0
2008 Q1 0 0 0
2007 Q4 0 0 0
2007 Q3 0 0 0
2007 Q2 1,102 0 0 0.0
2007 Q1 906 0 0 0.0
2006 Q4 183 0 0 0.0
2006 Q3 355 6 0 16901.4
2006 Q2 441 0 0 0.0
2006 Q1 393 0 0 0.0
2005 Q4 0 0 0
2005 Q3 0 0 0
2005 Q2 93 2 0 21505.4
2005 Q1 222 0 0 0.0
2004 Q4 0 0 0
2004 Q3 4 0 0 0.0
2004 Q2 0 0 0
2004 Q1 0 0 0
2003 Q4 0 0 0
2003 Q3 36 0 0 0.0
2003 Q2 870 0 0 0.0
2003 Q1 784 0 0 0.0
2002 Q4 635 2 0 3149.6
2002 Q3 211 38 27 180094.8
2002 Q2 1,038 5 5 4817.0
2002 Q1 0 0 0
2001 Q3 743 0 0 0.0
2001 Q2 1,271 8 4 6294.3
2001 Q1 0 0 0
2000 Q4 0 0 0
2000 Q3 0 0 0
2000 Q1 309 5 3 16181.2

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.