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.
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.
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.
5citations 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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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.
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.
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 quartersHide 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, 2024WY · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerMACHINERY