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TREMONTON PORTABLE: 1 recorded fatality Metal/Non-Metal

Controlled by Box Elder County - UT
Lynn, Box Elder County, UT  ·  Intermittent
MSHA Mine ID: 4200979

TREMONTON PORTABLE has $10K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
1
Total incidents
8
Years on record
1993–2026
Latest incident
Apr 2026
Compliance record
MSHA citations since 2002
30
citations
5
significant & substantial
$10,476
proposed penalties
$10,476
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Box Elder County Road Department's full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
44
inspections on record
497
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: 497 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

TREMONTON PORTABLE has $10K 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.
$10K
proposed penalties
$10K
current assessed
$10K
paid to date
$0
outstanding
30 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-09-09.
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.
16.7%
significant & substantial
10.0%
high negligence or reckless
16.7%
reasonably likely or greater
70.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 10.0% low, 80.0% moderate, 10.0% 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: 2025-09-24
0%
of limit-tested samples over the exposure limit
15
samples
3
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg9
  • Quartz, respirable, >1% Qtz3
  • Unlisted Particulate, respirable, <1% Qtz3
Show the individual readings (15)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-09-24 Respirable dust, <.1mg 0 Front-end Loader Operator
2025-09-24 Respirable dust, <.1mg 0 Bulldozer Operator
2021-03-30 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-03-30 Quartz, respirable, >1% Qtz 0.32 0.61 0.52 Crusher Oper/Worker
2015-06-10 Respirable dust, <.1mg 0 Crusher Oper/Worker
2015-06-10 Quartz, respirable, >1% Qtz 0.23 0.57 0.40 Front-end Loader Operator
2011-08-31 Respirable dust, <.1mg 0 Scraper Operator
2011-08-31 Quartz, respirable, >1% Qtz 0.21 1.13 0.19 Bulldozer Operator
2011-08-31 Respirable dust, <.1mg 0 Bulldozer Operator
2007-08-28 Respirable dust, <.1mg 0 Front-end Loader Operator
2007-08-28 Respirable dust, <.1mg 0 Crusher Oper/Worker
2007-08-28 Unlisted Particulate, respirable, <1% Qtz 0.15 Bulldozer Operator
2002-06-11 Unlisted Particulate, respirable, <1% Qtz 0.14 Crusher Oper/Worker
2002-06-11 Unlisted Particulate, respirable, <1% Qtz 0.25 Bulldozer Operator
2002-06-11 Respirable dust, <.1mg 0 Front-end Loader Operator

Area samples (mill and shop air)

Last sampled: 2017-04-04, 9 years ago
2
samples
Show the individual readings (2)
Date Contaminant Concentration Limit Conc / limit Area sampled
2017-04-04 Respirable dust, <.1mg 0 SF ORE PROCESSING
2017-04-04 Respirable dust, <.1mg 0 SF ACTIVE MINING
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. Box Elder County Road Department 1950 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 5
2025 4
2024 4
2023 4
2022 5
2021 4
2020 4
2019 5
2018 4
2017 3
2016 3
2015 4
2014 4
2013 3
2012 4
2011 4
2010 4
2009 3
2008 3
2007 3
2006 3
2005 4
2004 4
2003 4
2002 3
2001 3
2000 4
Source: MSHA quarterly employment and production, updated weekly.

TREMONTON PORTABLE sits in Box Elder County, Utah, where the Census mining category is 1.1% 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.
Box Elder County, Utah · Population 59,725
1.1%
Mining share of county employment
$77,865
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 1,082 0 0 0.0
2026 Q1 983 0 0 0.0
2025 Q4 709 0 0 0.0
2025 Q3 1,079 1 0 926.8
2025 Q2 207 0 0 0.0
2025 Q1 441 0 0 0.0
2024 Q4 1,024 0 0 0.0
2024 Q3 1,484 0 0 0.0
Show 96 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 1,367 1 0 731.5
2024 Q1 906 0 0 0.0
2023 Q4 333 1 1 3003.0
2023 Q3 836 0 0 0.0
2022 Q4 629 0 0 0.0
2022 Q3 902 0 0 0.0
2022 Q2 1,317 0 0 0.0
2022 Q1 649 0 0 0.0
2021 Q4 603 1 1 1658.4
2021 Q3 1,404 0 0 0.0
2021 Q2 1,357 0 0 0.0
2021 Q1 322 0 0 0.0
2020 Q4 640 0 0 0.0
2020 Q3 1,261 0 0 0.0
2020 Q2 1,631 0 0 0.0
2020 Q1 1,077 0 0 0.0
2019 Q4 1,038 0 0 0.0
2019 Q3 1,416 0 0 0.0
2019 Q2 801 1 0 1248.4
2019 Q1 75 0 0 0.0
2018 Q4 279 0 0 0.0
2018 Q3 795 0 0 0.0
2018 Q2 1,421 0 0 0.0
2018 Q1 30 0 0 0.0
2017 Q4 721 2 0 2773.9
2017 Q3 1,131 0 0 0.0
2017 Q2 1,109 1 1 901.7
2017 Q1 0 0 0
2016 Q4 477 0 0 0.0
2016 Q3 1,136 0 0 0.0
2016 Q2 926 1 0 1079.9
2016 Q1 0 0 0
2015 Q4 413 0 0 0.0
2015 Q3 990 0 0 0.0
2015 Q2 1,278 2 0 1564.9
2015 Q1 365 0 0 0.0
2014 Q4 384 1 0 2604.2
2014 Q3 691 0 0 0.0
2014 Q2 1,013 0 0 0.0
2014 Q1 115 0 0 0.0
2013 Q4 404 0 0 0.0
2013 Q3 231 0 0 0.0
2013 Q2 1,272 0 0 0.0
2013 Q1 0 0 0
2012 Q4 570 4 1 7017.5
2012 Q3 993 0 0 0.0
2012 Q2 860 2 0 2325.6
2012 Q1 220 0 0 0.0
2011 Q4 751 1 0 1331.6
2011 Q3 1,539 0 0 0.0
2011 Q2 1,323 0 0 0.0
2011 Q1 579 0 0 0.0
2010 Q4 886 0 0 0.0
2010 Q3 1,548 0 0 0.0
2010 Q2 1,312 0 0 0.0
2010 Q1 783 0 0 0.0
2009 Q4 354 4 0 11299.4
2009 Q3 1,218 0 0 0.0
2009 Q2 1,130 0 0 0.0
2009 Q1 725 0 0 0.0
2008 Q4 614 3 1 4886.0
2008 Q3 906 0 0 0.0
2008 Q2 1,154 0 0 0.0
2008 Q1 85 0 0 0.0
2007 Q4 795 0 0 0.0
2007 Q3 489 0 0 0.0
2007 Q2 750 0 0 0.0
2007 Q1 708 0 0 0.0
2006 Q4 656 0 0 0.0
2006 Q3 658 0 0 0.0
2006 Q2 1,164 0 0 0.0
2006 Q1 457 0 0 0.0
2005 Q4 665 0 0 0.0
2005 Q3 1,033 0 0 0.0
2005 Q2 83 0 0 0.0
2005 Q1 278 0 0 0.0
2004 Q4 598 0 0 0.0
2004 Q3 1,033 0 0 0.0
2004 Q2 916 0 0 0.0
2004 Q1 431 0 0 0.0
2003 Q4 711 0 0 0.0
2003 Q3 935 2 0 2139.0
2003 Q2 631 0 0 0.0
2003 Q1 851 0 0 0.0
2002 Q4 832 0 0 0.0
2002 Q3 744 0 0 0.0
2002 Q2 622 2 0 3215.4
2002 Q1 0 0 0
2001 Q4 649 0 0 0.0
2001 Q3 833 0 0 0.0
2001 Q2 702 0 0 0.0
2001 Q1 3 0 0 0.0
2000 Q4 858 0 0 0.0
2000 Q3 443 0 0 0.0
2000 Q2 845 0 0 0.0
2000 Q1 340 0 0 0.0

Fatalities at this mine

1 recorded

Reportable incidents

7 on file (excluding fatalities above)

2026 · 1 incident

April 29, 2026 UT · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Box Elder County Road Department · Caught in, under or between a moving and a stationary object

Sliding two pieces of plastic pipe together and caught EE's left hand/wrist and now it is sore and hard to move. Stiff and bruising.

2025 · 1 incident

June 9, 2025 UT · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Box Elder County Road Department · Over-exertion (Not Elsewhere Classified)

Weather was clear. Right ankle. Cleaning belt; felt/heard snap then my ankle rolled.

2024 · 1 incident

September 30, 2024 UT · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Box Elder County Road Department · Over-exertion (Not Elsewhere Classified)

Weather was clear. Climbing onto D8 Dozer, twisted left knee. It was sore and was swollen in the evening.

2023 · 1 incident

October 3, 2023 UT · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer OTHER
Box Elder County Road Department · (Not Elsewhere Classified)

Foreman was replacing clips on the conveyor belt while the person of interest was handing the foreman parts standing on the ground when EE got light headed, and sat down on a cement block. Foreman asked if EE was Okay and EE said no, and then EE bent over and started falling forward. The foreman grabbed EE and called for help, called 911, and two other employees performed CPR.

2021 · 1 incident

October 18, 2021 UT · Metal/Non-Metal outside foreman, leadman HANDTOOLS (NONPOWERED)
Box Elder County Road Department · Struck against stationary object

Screen belt bearings went out. Shut down crusher. Cleaning return rollers on belt with hammer. Under screen belt caught hammer and pulled hammer and Rt arm into the belt. Laceration on Rt hand, friction burn on forearm.

2018 · 1 incident

October 15, 2018 UT · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Box Elder County Road Department · Over-exertion (Not Elsewhere Classified)

Employee went to step up on the cement block and knee made a pop sound. Employee was limping after that point.

2009 · 1 incident

October 8, 2009 UT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Box Elder County Road Department · Fall from machine

EE was finishing the mechanical repair to a D8 Dozer (tighten fan belt) when his pry bar slipped and he lost his balance. This caused him to fall off the track of the dozer. Upon hitting the ground his left leg broke just below the knee.