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Portable Crusher #1: 52 MSHA citations Metal/Non-Metal

Controlled by Knife River Corporation
Missoula, Missoula County, MT  ·  Intermittent
MSHA Mine ID: 2402022

Portable Crusher #1 has $7K in proposed MSHA penalties and $0 outstanding across 2 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
6
Years on record
1993–2007
Latest incident
Apr 2007
Compliance record
MSHA citations since 2001
52
citations
7
significant & substantial
$6,605
proposed penalties
$6,515
paid to date
99% of proposed penalties paid to date, a $90 gap.
Source: MSHA violations data, updated weekly.
See Knife River Missoula's full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
49
inspections on record
595
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: 595 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 #1 has $7K in proposed MSHA penalties and $0 outstanding across 2 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.
$7K
proposed penalties
$7K
current assessed
$7K
paid to date
$0
outstanding
52 assessments are final orders; 2 contested dockets.
Of $317 in penalties contested before the Commission, $227 was upheld in final decisions.
As of the most recent assessment on 2024-08-13.
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.
13.5%
significant & substantial
0.0%
high negligence or reckless
13.5%
reasonably likely or greater
44.2%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 23.1% low, 76.9% moderate, 0.0% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
ⓘ Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
2 citations taken to the federal commission · 4% of citations on record
  • Settled 1 · 50%
  • Stood as issued 1 · 50%
50%
S&S designation survived the contest
ⓘ Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 2 decided S&S contests · industry: 79%
28%
Penalty reduction in decided contests
$317 proposed, $227 after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2014-01-23.
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
WEST 2013-719M Settlement Lesnick 2013 $190 → $100
WEST 2014-290M Dismissal Manning 2014 $127 → $127
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: 2026-06-16
53%
of limit-tested samples over the exposure limit
26
samples
19
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz1910 over
  • Respirable dust, <.1mg7
Show the individual readings (26)
Date Contaminant Concentration Limit Conc / limit Occupation
2011-06-28 Quartz, respirable, >1% Qtz 0.5 0.39 1.28 Bobcat Operator
2011-03-29 Quartz, respirable, >1% Qtz 0.52 0.52 1.00 Crusher Oper/Worker
2011-03-29 Quartz, respirable, >1% Qtz 0.72 0.44 1.64 Laborer, Bullgang
2003-08-20 Quartz, respirable, >1% Qtz 0.98 0.38 2.58 Crusher Oper/Worker
2003-08-20 Quartz, respirable, >1% Qtz 0.76 0.4 1.90 Front-end Loader Operator
2003-06-24 Quartz, respirable, >1% Qtz 0.56 0.39 1.44 Crusher Oper/Worker
2003-06-24 Quartz, respirable, >1% Qtz 0.57 0.38 1.50 Cleanup Man
2002-11-06 Quartz, respirable, >1% Qtz 0.6 0.44 1.36 Front-end Loader Operator
2002-11-06 Quartz, respirable, >1% Qtz 1.97 0.35 5.63 Crusher Oper/Worker
2002-11-06 Quartz, respirable, >1% Qtz 1.02 0.6 1.70 Cleanup Man
2026-06-16 Respirable dust, <.1mg 0 Crusher Oper/Worker
2026-06-16 Respirable dust, <.1mg 0 Crusher Oper/Worker
2026-06-16 Respirable dust, <.1mg 0 Front-end Loader Operator
2026-06-16 Respirable dust, <.1mg 0 Bobcat Operator
2019-04-03 Respirable dust, <.1mg 0 Front-end Loader Operator
2019-04-03 Quartz, respirable, >1% Qtz 0.21 0.34 0.62 Crusher Oper/Worker
2019-04-03 Respirable dust, <.1mg 0 Supervisor, Co. Official
2019-04-03 Quartz, respirable, >1% Qtz 0.32 0.48 0.67 Bobcat Operator
2014-06-03 Quartz, respirable, >1% Qtz 0.19 1.55 0.12 Crusher Oper/Worker
2014-06-03 Quartz, respirable, >1% Qtz 0.24 0.51 0.47 Cleanup Man
2014-06-03 Respirable dust, <.1mg 0 Front-end Loader Operator
2011-03-29 Quartz, respirable, >1% Qtz 0.32 0.47 0.68 Front-end Loader Operator
2003-08-20 Quartz, respirable, >1% Qtz 0.56 0.61 0.92 Cleanup Man
2003-06-24 Quartz, respirable, >1% Qtz 0.38 0.4 0.95 Front-end Loader Operator
2000-10-26 Quartz, respirable, >1% Qtz 0.13 0.55 0.24 Cleanup Man
2000-10-26 Quartz, respirable, >1% Qtz 0.72 1.11 0.65 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. Jtl Group Inc 1993 to 2002
  2. Knife River Missoula 2002 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 4
2025 4
2024 4
2023 5
2022 4
2021 5
2020 5
2019 4
2018 5
2017 7
2016 6
2015 10
2014 6
2013 7
2012 6
2011 6
2010 5
2009 7
2008 4
2007 5
2006 5
2005 6
2004 8
2003 8
2002 7
2001 5
2000 5
Source: MSHA quarterly employment and production, updated weekly.

Portable Crusher #1 sits in Missoula County, Montana, where the Census mining category is 0.2% 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.
Missoula County, Montana · Population 119,639
0.2%
Mining share of county employment
$71,246
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 2,645 0 0 0.0
2026 Q1 867 0 0 0.0
2025 Q4 1,382 0 0 0.0
2025 Q3 2,011 0 0 0.0
2025 Q2 2,060 0 0 0.0
2025 Q1 522 0 0 0.0
2024 Q4 2,358 0 0 0.0
2024 Q3 1,844 1 0 542.3
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 1,521 0 0 0.0
2024 Q1 0 0 0
2023 Q4 1,595 0 0 0.0
2023 Q3 2,539 0 0 0.0
2023 Q2 2,211 0 0 0.0
2023 Q1 1,614 0 0 0.0
2022 Q4 1,468 0 0 0.0
2022 Q3 2,351 0 0 0.0
2022 Q2 2,279 0 0 0.0
2022 Q1 0 0 0
2021 Q4 2,819 0 0 0.0
2021 Q3 2,699 0 0 0.0
2021 Q2 945 5 1 5291.0
2021 Q1 1,556 0 0 0.0
2020 Q4 2,258 0 0 0.0
2020 Q3 2,222 0 0 0.0
2020 Q2 2,237 0 0 0.0
2020 Q1 1,583 0 0 0.0
2019 Q4 1,815 0 0 0.0
2019 Q3 1,836 0 0 0.0
2019 Q2 1,867 2 0 1071.2
2019 Q1 1,067 0 0 0.0
2018 Q4 1,121 0 0 0.0
2018 Q3 3,136 2 0 637.8
2018 Q2 2,698 0 0 0.0
2018 Q1 452 2 0 4424.8
2017 Q4 1,695 0 0 0.0
2017 Q3 3,175 0 0 0.0
2017 Q2 2,926 0 0 0.0
2017 Q1 2,000 0 0 0.0
2016 Q4 2,545 2 0 785.9
2016 Q3 4,265 0 0 0.0
2016 Q2 0 0 0
2016 Q1 1,107 1 0 903.3
2015 Q4 3,427 0 0 0.0
2015 Q3 3,604 0 0 0.0
2015 Q2 4,489 1 0 222.8
2015 Q1 3,644 0 0 0.0
2014 Q4 3,266 2 1 612.4
2014 Q3 2,622 0 0 0.0
2014 Q2 3,756 6 1 1597.4
2014 Q1 3,014 0 0 0.0
2013 Q4 2,897 3 1 1035.6
2013 Q3 3,789 0 0 0.0
2013 Q2 3,802 0 0 0.0
2013 Q1 3,141 2 0 636.7
2012 Q4 2,374 0 0 0.0
2012 Q3 2,985 2 0 670.0
2012 Q2 3,498 0 0 0.0
2012 Q1 1,428 2 0 1400.6
2011 Q4 1,919 0 0 0.0
2011 Q3 2,273 0 0 0.0
2011 Q2 1,940 1 1 515.5
2011 Q1 2,222 1 0 450.0
2010 Q4 0 0 0
2010 Q3 2,622 0 0 0.0
2010 Q2 2,881 0 0 0.0
2010 Q1 2,303 0 0 0.0
2009 Q4 1,626 0 0 0.0
2009 Q3 3,385 0 0 0.0
2009 Q2 3,185 0 0 0.0
2009 Q1 3,879 2 0 515.6
2008 Q4 439 0 0 0.0
2008 Q3 1,528 0 0 0.0
2008 Q2 1,977 0 0 0.0
2008 Q1 2,169 1 0 461.0
2007 Q4 2,482 0 0 0.0
2007 Q3 2,566 0 0 0.0
2007 Q2 2,685 0 0 0.0
2007 Q1 1,940 0 0 0.0
2006 Q4 2,205 0 0 0.0
2006 Q3 2,676 0 0 0.0
2006 Q2 2,868 0 0 0.0
2006 Q1 1,486 0 0 0.0
2005 Q4 2,136 0 0 0.0
2005 Q3 2,887 1 0 346.4
2005 Q2 2,880 0 0 0.0
2005 Q1 2,677 0 0 0.0
2004 Q4 3,212 0 0 0.0
2004 Q3 3,756 1 0 266.2
2004 Q2 3,230 0 0 0.0
2004 Q1 2,290 0 0 0.0
2003 Q4 2,265 0 0 0.0
2003 Q3 4,369 2 0 457.8
2003 Q2 3,452 2 0 579.4
2003 Q1 1,378 0 0 0.0
2002 Q4 2,876 7 2 2433.9
2002 Q3 3,657 0 0 0.0
2002 Q2 3,535 0 0 0.0
2002 Q1 2,040 0 0 0.0
2001 Q4 1,367 1 0 731.5
2001 Q3 2,660 0 0 0.0
2001 Q2 1,991 0 0 0.0
2001 Q1 1,765 0 0 0.0
2000 Q4 2,435 0 0 0.0
2000 Q3 2,046 0 0 0.0
2000 Q2 3,489 0 0 0.0
2000 Q1 1,227 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

6 on file

2007 · 1 incident

April 16, 2007 MT · Metal/Non-Metal outside foreman, leadman SLIP OR FALL OF PERSON
Knife River Missoula · Fall to the walkway or working surface

Employee slipped and fell. He caught himself with outstreched arm, dislocating shoulder.

1998 · 3 incidents

November 22, 1998 MT · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Jtl Group Inc · Over-exertion (Not Elsewhere Classified)

PRIMING THE WATER PUMP FOR THE CRUSHER DUST ABATEMENT APPRATUS. EMPLOYEE LIFTED A FIVE GALLON BUCKE TOF WATER AND POURED IT INTO THE PUMP. HE BENT OVER AND REPLACED THE PLUG AND WHEN HE STOO D UP HE FELT A SHARP PAIN IN HIS LOWER BACK. HE KEPT WORKING, RUNNING LOADER, FOR FOUR HOURS AND THEN SAID HE WANTED TO SEE A DR.

May 26, 1998 MT · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator ELECTRICAL
Jtl Group Inc · Contact with electrical current

THE CRUSHER SHUT DOWN AND HE TURNED OFF THE MAIN SWITCH AND LOCKED OUT THE MAIN POWER. WHILE PERFORMING MAINTENANCE ON THE CONVEYOR PULLEYS, AN ELECTRICAL STORM PASSED THROUGH THE AREA. HE WAS HOLDING UP A GUARD PLATE, READY TO GREASE THE TAIL PULLEY, WHEN LIGHTENING HIT THE UNIT HE WAS WORKING ON. A BOLT OF POWER ARCHED FROM THE PLATE TO THE GROUND, CAUSING HIS MUSCLES TO CONSTRIC

April 17, 1998 MT · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Jtl Group Inc · Over-exertion in pulling or pushing objects

EE WAS INSPECTING THE BLOW BARS FOR WEAR ON THE HSI CRUSHER THAT MORNING. HE WAS REACHING THROUGH THE INSPECTION PLATE HOLE ACCESS AND ROTATING THE ROLLER. WITH HIS RIGHT ARM FULLY EXTENDED AN D PULLING THE ROLLER FROM RIGHT TO LEFT, HE FELTADN HEARD A POPPING NOISE IN HIS RIGHT SHOULDER. THE PAIN WOULD NOT GO AWAY AND DECIDED TO SEE A DR. BY THAT AFTERNOON.

1997 · 1 incident

July 31, 1997 MT · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Jtl Group Inc · Struck by... (Not Elsewhere Classified)

EE WAS REMOVING THE PROTECTIVE COVER FROM A BELTPUNCH WITH A UTILITY KNIFE. HE WAS HOLDING THE PUNCH IN HIS LEFT HAND AND CUTTING WITH HIS RIGHTHAND. THE KNIFE BLADE SLIPPED OFF AND CUT INTO HIS LEFT INDEX FINGER.

1993 · 1 incident

October 26, 1993 MT · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Jtl Group Inc · Caught in, under or between (Not Elsewhere Classified)

WHILE REPLACING A STEEL RING ON THE VSI CRUSHER. THE EMPLOYEE'S MIDDLE AND RING FINGERS ON HIS RIGHT HAND, BECAME CAUGHT IN A PINCH POINT BETWEEN THE STEEL RING AND THE STEEL BODY OF THE VSI. HE RECEIVED CUTS WHICH REQUIRED STICHES.