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Crusher #1: 100 MSHA citations Metal/Non-Metal

Controlled by Knife River Corporation
Boise, Ada County, ID  ·  Active
MSHA Mine ID: 1002089

Crusher #1 has $98K in proposed MSHA penalties and $0 outstanding across 5 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
11
Years on record
2009–2026
Latest incident
Jul 2026
Compliance record
MSHA citations since 2006
100
citations
23
significant & substantial
$98,414
proposed penalties
$56,006
paid to date
57% of proposed penalties paid to date, a $42,408 gap.
Source: MSHA violations data, updated weekly.
See Knife River Corporation Mountain West's full MSHA compliance history →
Inspection activity
MSHA inspections since 2006
56
inspections on record
641
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: 641 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘ A Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
1
Section 107(a) orders
Most recent order: 2020-09-16.
On record since 2020.
Source: MSHA imminent-danger order records, updated weekly.

Crusher #1 has $98K in proposed MSHA penalties and $0 outstanding across 5 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.
$98K
proposed penalties
$56K
current assessed
$56K
paid to date
$0
outstanding
98 assessments are final orders; 5 contested dockets.
Of $72K in penalties contested before the Commission, $29K was upheld in final decisions.
As of the most recent assessment on 2025-01-13.
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.
23.5%
significant & substantial
3.1%
high negligence or reckless
23.5%
reasonably likely or greater
67.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 18.4% low, 78.6% moderate, 3.1% 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.
5 citations taken to the federal commission · 5% of citations on record
  • Settled 4 · 80%
  • Stood as issued 1 · 20%
75%
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 4 decided S&S contests · industry: 79%
59%
Penalty reduction in decided contests
$72K proposed, $29K 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 2020-12-09.
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 2021-0076 Settlement Manning 2021 $32K → $4K
WEST 2019-0415 Settlement Miller 2019 $28K → $15K
WEST 2019-0336 Settlement Miller 2019 $9K → $9K
WEST 2020-0270 Settlement Manning 2020 $2K → $536
WEST 2007-432M Dismissal Weisberger 2007 $60 → $0
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: 2025-11-25
7%
of limit-tested samples over the exposure limit
23
samples
14
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz151 over
  • Respirable dust, <.1mg8
Show the individual readings (23)
Date Contaminant Concentration Limit Conc / limit Occupation
2020-09-16 Quartz, respirable, >1% Qtz 0.96 0.94 1.02 Laborer, Bullgang
2025-11-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2025-11-25 Respirable dust, <.1mg 0 Truck Driver
2025-11-25 Respirable dust, <.1mg 0 Truck Driver
2025-11-25 Respirable dust, <.1mg 0 Laborer, Bullgang
2020-09-16 Quartz, respirable, >1% Qtz 0.79 0.83 0.95 Laborer, Bullgang
2018-12-04 Quartz, respirable, >1% Qtz 0.17 Truck Driver
2018-12-04 Quartz, respirable, >1% Qtz 0.25 0.7 0.36 Laborer, Bullgang
2016-06-22 Respirable dust, <.1mg 0 Bulldozer Operator
2016-06-22 Respirable dust, <.1mg 0 Front-end Loader Operator
2016-06-22 Quartz, respirable, >1% Qtz 0.38 1.92 0.20 Laborer, Bullgang
2016-06-22 Quartz, respirable, >1% Qtz 0.45 1.3 0.35 Laborer, Bullgang
2016-01-20 Quartz, respirable, >1% Qtz 0.76 0.92 0.83 Laborer, Bullgang
2016-01-20 Quartz, respirable, >1% Qtz 0.18 1 0.18 Front-end Loader Operator
2016-01-20 Quartz, respirable, >1% Qtz 0.25 0.85 0.29 Truck Driver
2014-12-23 Respirable dust, <.1mg 0 Truck Driver
2014-12-23 Quartz, respirable, >1% Qtz 0.13 0.98 0.13 Laborer, Bullgang
2014-12-23 Quartz, respirable, >1% Qtz 0.14 0.94 0.15 Front-end Loader Operator
2013-02-20 Quartz, respirable, >1% Qtz 0.35 0.68 0.51 Laborer, Bullgang
2013-02-20 Quartz, respirable, >1% Qtz 0.31 0.67 0.46 Laborer, Bullgang
2009-10-14 Quartz, respirable, >1% Qtz 0.25 0.98 0.26 Laborer, Bullgang
2009-10-14 Quartz, respirable, >1% Qtz 0.24 0.76 0.32 Laborer, Bullgang
2009-10-14 Respirable dust, <.1mg 0 Bulldozer 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.

Crusher #1 recorded 0.00 reportable injury cases per 100 full-time workers in 2025.

Injury rate, 2025
ⓘ 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 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In Idaho, metal and nonmetal mining averaged 2.26 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
2025 * 0.00 0.00 0.000
2024 * 9.82 0.00 0.000
2023 * 0.00 0.00 0.000
2022 * 0.00 0.00 0.000
2021 * 0.00 0.00 0.000
2020 * 0.00 0.00 0.000
2019 * 15.47 10.31 0.000
2018 * 5.31 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. Knife River 2006 to 2009
  2. Knife River Southern Idaho Division 2010 to 2023
  3. Knife River Corporation Mountain West 2023 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 16
2025 9
2024 10
2023 23
2022 18
2021 15
2020 12
2019 15
2018 15
2017 13
2016 12
2015 15
2014 21
2013 19
2012 17
2011 11
2010 11
2009 10
2008 6
2007 9
2006 5
Source: MSHA quarterly employment and production, updated weekly.

Crusher #1 sits in Ada County, Idaho, where the Census mining category is 0.1% 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.
Ada County, Idaho · Population 508,052
0.1%
Mining share of county employment
$88,907
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 11,175 0 0 0.0
2026 Q1 6,923 0 0 0.0
2025 Q4 5,936 0 0 0.0
2025 Q3 6,455 0 0 0.0
2025 Q2 6,014 0 0 0.0
2025 Q1 4,940 9 2 1821.9
2024 Q4 5,109 3 0 587.2
2024 Q3 6,320 4 0 632.9
Show 73 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 5,698 0 0 0.0
2024 Q1 3,235 1 0 309.1
2023 Q4 9,718 0 0 0.0
2023 Q3 12,414 0 0 0.0
2023 Q2 10,570 0 0 0.0
2023 Q1 10,451 1 1 95.7
2022 Q4 9,728 0 0 0.0
2022 Q3 8,491 0 0 0.0
2022 Q2 8,557 0 0 0.0
2022 Q1 8,529 0 0 0.0
2021 Q4 9,398 0 0 0.0
2021 Q3 8,982 0 0 0.0
2021 Q2 8,399 1 0 119.1
2021 Q1 9,020 0 0 0.0
2020 Q4 8,077 1 0 123.8
2020 Q3 8,551 3 1 350.8
2020 Q2 8,021 0 0 0.0
2020 Q1 8,226 1 0 121.6
2019 Q4 9,180 0 0 0.0
2019 Q3 10,323 0 0 0.0
2019 Q2 10,708 10 1 933.9
2019 Q1 8,577 4 2 466.4
2018 Q4 10,966 2 2 182.4
2018 Q3 9,231 0 0 0.0
2018 Q2 9,355 1 0 106.9
2018 Q1 8,089 0 0 0.0
2017 Q4 8,068 6 1 743.7
2017 Q3 9,318 1 1 107.3
2017 Q2 8,253 1 0 121.2
2017 Q1 6,400 2 0 312.5
2016 Q4 4,706 0 0 0.0
2016 Q3 4,526 0 0 0.0
2016 Q2 5,462 1 0 183.1
2016 Q1 11,045 2 0 181.1
2015 Q4 8,145 0 0 0.0
2015 Q3 6,154 0 0 0.0
2015 Q2 10,570 1 0 94.6
2015 Q1 3,239 0 0 0.0
2014 Q4 10,078 2 0 198.5
2014 Q3 12,956 0 0 0.0
2014 Q2 13,373 0 0 0.0
2014 Q1 11,157 0 0 0.0
2013 Q4 7,377 4 1 542.2
2013 Q3 7,401 0 0 0.0
2013 Q2 11,792 0 0 0.0
2013 Q1 10,027 1 0 99.7
2012 Q4 11,636 2 2 171.9
2012 Q3 11,022 2 1 181.5
2012 Q2 9,174 1 1 109.0
2012 Q1 5,824 0 0 0.0
2011 Q4 8,363 0 0 0.0
2011 Q3 9,316 0 0 0.0
2011 Q2 4,351 2 0 459.7
2011 Q1 3,292 0 0 0.0
2010 Q4 5,346 3 1 561.2
2010 Q3 6,867 0 0 0.0
2010 Q2 7,330 2 1 272.9
2010 Q1 4,979 0 0 0.0
2009 Q4 4,609 5 0 1084.8
2009 Q3 9,649 0 0 0.0
2009 Q2 5,034 2 0 397.3
2009 Q1 4,098 0 0 0.0
2008 Q4 3,661 0 0 0.0
2008 Q3 3,883 0 0 0.0
2008 Q2 2,829 0 0 0.0
2008 Q1 2,221 1 0 450.2
2007 Q4 2,955 0 0 0.0
2007 Q3 9,328 0 0 0.0
2007 Q2 7,694 0 0 0.0
2007 Q1 8,000 2 0 250.0
2006 Q4 3,152 0 0 0.0
2006 Q3 5,184 16 5 3086.4
2006 Q2 3,463 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

11 on file

2026 · 2 incidents

July 30, 2026 ID · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Knife River Corporation Mountain West · Struck by flying object

An employee was tightening countersink allen bolts on a rock shelf for an impactor. TM was holding an allen wrench on the bolt head while another TM put an impact gun on the backside nut. Force of impact gun on the nut threw the allen wrench from TM's hand toward EE's mouth and fractured a tooth.

July 21, 2026 ID · Metal/Non-Metal superintendent SLIP OR FALL OF PERSON
Knife River Corporation Mountain West · Fall to the walkway or working surface

EE was stepping back after hooking up rigging and stepped into a low spot which caught EE's foot as EE fell. EE applied ice and rested it for 6 days with little improvement so got x rays on 7/27 which showed a broken bone in EE's ankle. EE is cleared for light duty work at this time.

2024 · 1 incident

October 30, 2024 ID · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer OTHER
Knife River Corporation Mountain West · Bodily reaction, (Not Elsewhere Classified)

Employee bent down and knee popped and shooting pain up employee's leg.

2019 · 3 incidents

September 12, 2019 ID · Metal/Non-Metal outside foreman, leadman ELECTRICAL
Knife River Southern Idaho Division · Struck by flying object

Trouble shooting on electrical starter in control van. Employee went to de-energize breaker and the breaker malfunctioned causing small debris to discharge into employee's work area. Debris went inside the top employee's safety glasses. Employee suffered laceration to surface of eye and no impairment is expected.

February 28, 2019 ID · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator POWERED HAULAGE
Knife River Southern Idaho Division · Caught in, under or between a moving and a stationary object

The employee was trying to adjust a chain on the telescoping conveyor. The cable clamp holding the sliding conveyor in place came apart and the conveyor belt slid down crushing the employee.

2018 · 1 incident

August 7, 2018 ID · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Knife River Southern Idaho Division · Fall from machine

The employee was on a conveyer belt. Harness was on. The employee failed to follow lockout tagout procedures. The belt was started and the employee jumped from the belt causing a hairline fracture to the right ankle. Employee is currently on light duty.

2017 · 1 incident

September 13, 2017 ID · Metal/Non-Metal crusher attendant/operator, pan feeder operator/worker MACHINERY
Knife River Southern Idaho Division · Caught in, under or between running or meshing objects

The employee attempted to stop a pulley and belt system with employee's left hand.

2014 · 1 incident

April 12, 2014 ID · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Knife River Southern Idaho Division · Caught in, under or between a moving and a stationary object

Running a half inch Drill Motor the bit caught and the drill twisted around and fractured the employees right hand,

2010 · 1 incident

November 30, 2010 ID · Metal/Non-Metal ledgeman/hand, quarry man MACHINERY
Knife River Southern Idaho Division · Struck by... (Not Elsewhere Classified)

Mine operator sitting in seat of excavator turned to see what other miner wanted as he had yelled. When he turned in the seat coat sleeve caught swing lever and swung excavator into other operator's foot.

2009 · 1 incident

July 21, 2009 ID · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Knife River · Contact with electrical current

Employee Failed to follow Posted Lock Out TagOut Procedure Wrench fell into electrical box and caused Arc Flash