Mining Incidents

PIONEER TRAILS PIT #565: 56 MSHA citations Metal/Non-Metal

Rock Springs, Sweetwater County, WY  ·  Intermittent
MSHA Mine ID: 4801440

PIONEER TRAILS PIT #565 has $9K 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
1
Years on record
2024
Latest incident
Apr 2024
Compliance record
MSHA citations since 2000
56
citations
9
significant & substantial
$8,610
proposed penalties
$8,497
paid to date
99% of proposed penalties paid to date, a $113 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
63
inspections on record
521
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: 521 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

PIONEER TRAILS PIT #565 has $9K 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.
$9K
proposed penalties
$8K
current assessed
$8K
paid to date
$0
outstanding
56 assessments are final orders; 2 contested dockets.
Of $893 in penalties contested before the Commission, $780 was upheld in final decisions.
As of the most recent assessment on 2025-12-08.
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.
16.1%
significant & substantial
8.9%
high negligence or reckless
16.1%
reasonably likely or greater
48.2%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 16.1% low, 75.0% moderate, 8.9% 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 · 9% of citations on record
  • Settled 5 · 100%
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%
13%
Penalty reduction in decided contests
$893 proposed, $780 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 2024-10-30.
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 2022-0167 Settlement 2022 $633 → $633
WEST 2025-0020 Settlement Bulluck 2025 $260 → $147
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: 2025-06-27
0%
of limit-tested samples over the exposure limit
14
samples
1
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg12
  • Quartz, respirable, >1% Qtz2
Show the individual readings (14)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-06-27 Respirable dust, <.1mg 0 Bobcat Operator
2025-06-27 Respirable dust, <.1mg 0 Front-end Loader Operator
2025-06-27 Quartz, respirable, >1% Qtz 0.15 Screen/Scalper Operator
2025-06-27 Respirable dust, <.1mg 0 Scale Man
2025-06-27 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-09-28 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-09-28 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-09-28 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-08-03 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-08-03 Respirable dust, <.1mg 0 Washer Operator
2016-06-16 Respirable dust, <.1mg 0 Front-end Loader Operator
2013-05-02 Quartz, respirable, >1% Qtz 0.47 1.43 0.33 Front-end Loader Operator
2007-05-09 Respirable dust, <.1mg 0 Front-end Loader Operator
2007-05-09 Respirable dust, <.1mg 0 Crusher Oper/Worker
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. Layos Inc 1985 to 2004
  2. Gorge Rock Products 2004 to 2017
  3. Suncore Construction and Materials Inc. 2017 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 5
2025 4
2024 3
2023 3
2022 4
2021 4
2020 5
2019 4
2018 2
2017 3
2016 4
2015 3
2014 2
2013 2
2012 2
2011 2
2010 1
2009 3
2008 4
2007 3
2006 3
2005 3
2004 2
2003 2
2002 1
2001 1
2000 1
Source: MSHA quarterly employment and production, updated weekly.

PIONEER TRAILS PIT #565 sits in Sweetwater County, Wyoming, where the Census mining category is 13.3% 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.
Sweetwater County, Wyoming · Population 41,786
13.3%
Mining share of county employment
$76,464
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 3,170 0 0 0.0
2026 Q1 1,974 0 0 0.0
2025 Q4 2,055 1 0 486.6
2025 Q3 3,719 0 0 0.0
2025 Q2 3,187 2 0 627.5
2025 Q1 843 1 0 1186.2
2024 Q4 1,656 0 0 0.0
2024 Q3 2,247 5 0 2225.2
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 2,005 0 0 0.0
2024 Q1 1,025 0 0 0.0
2023 Q4 1,071 5 1 4668.5
2023 Q3 2,295 0 0 0.0
2023 Q2 2,379 0 0 0.0
2023 Q1 1,084 0 0 0.0
2022 Q4 2,178 0 0 0.0
2022 Q3 3,021 0 0 0.0
2022 Q2 3,886 3 1 772.0
2022 Q1 761 0 0 0.0
2021 Q4 2,393 4 1 1671.5
2021 Q3 3,382 6 1 1774.1
2021 Q2 2,715 0 0 0.0
2021 Q1 1,434 1 0 697.4
2020 Q4 1,836 0 0 0.0
2020 Q3 2,401 0 0 0.0
2020 Q2 3,735 1 0 267.7
2020 Q1 1,197 0 0 0.0
2019 Q4 1,156 3 0 2595.2
2019 Q3 2,173 1 0 460.2
2019 Q2 1,193 0 0 0.0
2019 Q1 566 0 0 0.0
2018 Q4 910 0 0 0.0
2018 Q3 951 2 0 2103.0
2018 Q2 346 0 0 0.0
2018 Q1 623 0 0 0.0
2017 Q4 1,087 0 0 0.0
2017 Q3 1,312 0 0 0.0
2017 Q2 1,392 1 1 718.4
2017 Q1 806 0 0 0.0
2016 Q4 1,354 2 1 1477.1
2016 Q3 1,522 0 0 0.0
2016 Q2 1,528 0 0 0.0
2016 Q1 959 0 0 0.0
2015 Q4 1,124 0 0 0.0
2015 Q3 1,739 2 0 1150.1
2015 Q2 1,179 0 0 0.0
2015 Q1 740 0 0 0.0
2014 Q4 910 0 0 0.0
2014 Q3 1,107 1 0 903.3
2014 Q2 1,129 0 0 0.0
2014 Q1 752 0 0 0.0
2013 Q4 754 0 0 0.0
2013 Q3 1,107 0 0 0.0
2013 Q2 1,068 2 0 1872.7
2013 Q1 780 0 0 0.0
2012 Q4 818 0 0 0.0
2012 Q3 1,131 1 0 884.2
2012 Q2 1,126 0 0 0.0
2012 Q1 334 0 0 0.0
2011 Q4 727 2 2 2751.0
2011 Q3 1,303 0 0 0.0
2011 Q2 496 1 0 2016.1
2011 Q1 489 0 0 0.0
2010 Q4 240 0 0 0.0
2010 Q3 647 1 1 1545.6
2010 Q2 562 0 0 0.0
2010 Q1 531 0 0 0.0
2009 Q4 1,050 0 0 0.0
2009 Q3 1,791 0 0 0.0
2009 Q2 1,568 0 0 0.0
2009 Q1 1,161 0 0 0.0
2008 Q4 1,333 1 0 750.2
2008 Q3 1,943 0 0 0.0
2008 Q2 1,410 0 0 0.0
2008 Q1 551 0 0 0.0
2007 Q4 1,155 0 0 0.0
2007 Q3 1,223 0 0 0.0
2007 Q2 1,505 0 0 0.0
2007 Q1 1,264 0 0 0.0
2006 Q4 1,490 0 0 0.0
2006 Q3 1,508 0 0 0.0
2006 Q2 1,278 0 0 0.0
2006 Q1 1,194 0 0 0.0
2005 Q4 1,123 0 0 0.0
2005 Q3 1,483 0 0 0.0
2005 Q2 1,429 0 0 0.0
2005 Q1 1,229 0 0 0.0
2004 Q4 1,217 0 0 0.0
2004 Q3 1,309 0 0 0.0
2004 Q2 1,145 2 0 1746.7
2004 Q1 529 0 0 0.0
2003 Q4 571 1 0 1751.3
2003 Q3 1,079 0 0 0.0
2003 Q2 1,255 2 0 1593.6
2003 Q1 110 1 0 9090.9
2002 Q4 0 0 0
2002 Q3 865 0 0 0.0
2002 Q2 585 0 0 0.0
2002 Q1 1,078 0 0 0.0
2001 Q4 0 0 0
2001 Q3 1,204 0 0 0.0
2001 Q2 270 0 0 0.0
2001 Q1 0 0 0
2000 Q4 0 0 0
2000 Q3 1,052 1 0 950.6
2000 Q2 706 0 0 0.0
2000 Q1 0 0 0
No fatalities recorded at this mine.

Reportable incidents

1 on file

2024 · 1 incident

April 3, 2024 WY · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer MACHINERY
Suncore Construction and Materials Inc. · Flash burns (welding)

Employee was doing patch welds on hopper, next morning (4/4/24) reported EE had received arc flash to both eyes.