Pioneer/Portable 2 Unit #412 has $5K 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
1988
Latest incident
Jul 1988
Compliance record
MSHA citations since 2001
44
citations
6
significant & substantial
$5,353
proposed penalties
$4,789
paid to date
89% of proposed penalties paid to date, a $564 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: 367 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/Portable 2 Unit #412 has $5K 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.
$5K
proposed penalties
$5K
current assessed
$5K
paid to date
$0
outstanding
44 assessments are final orders; 2 contested dockets.
Of $1K in penalties contested before the Commission, $361 was upheld in final decisions.
As of the most recent assessment on 2024-09-10.
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.
4citations taken to the federal commission · 9% of citations on record
Settled
2 · 50%
Vacated or withdrawn
2 · 50%
100%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 1 decided S&S contests · industry: 79%
69%
Penalty reduction in decided contests
$1K proposed, $361 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 2018-08-20.
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: 2025-09-16
25%
of limit-tested samples over the exposure limit
13
samples
4
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz41 over
Respirable dust, <.1mg8
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (13)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2006-04-13
Quartz, respirable, >1% Qtz
1.18
0.97
1.22
Crusher Oper/Worker
2025-09-16
Respirable dust, <.1mg
0
Front-end Loader Operator
2018-07-03
Respirable dust, <.1mg
0
Front-end Loader Operator
2014-09-09
Respirable dust, <.1mg
0
Truck Driver
2014-09-09
Respirable dust, <.1mg
0
Front-end Loader Operator
2014-09-09
Respirable dust, <.1mg
0
Backhoe Operator
2008-05-21
Quartz, respirable, >1% Qtz
0.25
0.42
0.60
Crusher Oper/Worker
2008-05-21
Quartz, respirable, >1% Qtz
0.24
0.51
0.47
Crusher Oper/Worker
2006-08-15
Quartz, respirable, >1% Qtz
1.12
2.06
0.54
Crusher Oper/Worker
2006-04-13
Respirable dust, <.1mg
0
Front-end Loader Operator
2002-04-25
Respirable dust, <.1mg
0
Crusher Oper/Worker
2002-04-25
Respirable dust, <.1mg
0
Front-end Loader Operator
2002-04-25
Unlisted Particulate, respirable, <1% Qtz
0.91
Truck Driver
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
3
2025
3
2024
3
2023
3
2022
3
2021
4
2020
4
2019
3
2018
4
2017
5
2016
6
2015
7
2014
6
2010
1
2009
1
2008
3
2007
3
2006
2
2005
4
2004
5
2003
6
2002
5
2001
6
2000
6
Source: MSHA quarterly employment and production, updated weekly.
Pioneer/Portable 2 Unit #412 sits in Cumberland County, Maine, where the Census mining category is 0.0% 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.
Cumberland County, Maine · Population 305,940
0.0%
Mining share of county employment
$92,983
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
651
0
0
0.0
2026 Q1
2
0
0
0.0
2025 Q4
2
0
0
0.0
2025 Q3
451
0
0
0.0
2025 Q2
501
0
0
0.0
2025 Q1
2
0
0
0.0
2024 Q4
251
0
0
0.0
2024 Q3
751
2
0
2663.1
Show 80 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
4,750
0
0
0.0
2024 Q1
2
0
0
0.0
2023 Q4
251
0
0
0.0
2023 Q3
951
2
1
2103.0
2023 Q2
1,986
0
0
0.0
2023 Q1
2
0
0
0.0
2022 Q4
151
0
0
0.0
2022 Q3
1,251
0
0
0.0
2022 Q2
126
1
0
7936.5
2022 Q1
2
0
0
0.0
2021 Q4
501
0
0
0.0
2021 Q3
1,251
0
0
0.0
2021 Q2
1,594
3
0
1882.1
2021 Q1
2
0
0
0.0
2020 Q4
1,501
0
0
0.0
2020 Q3
1,201
0
0
0.0
2020 Q2
1,636
0
0
0.0
2020 Q1
2
0
0
0.0
2019 Q4
1,532
0
0
0.0
2019 Q3
2,555
0
0
0.0
2019 Q1
2
0
0
0.0
2018 Q4
716
2
1
2793.3
2018 Q3
865
4
0
4624.3
2018 Q2
1,223
0
0
0.0
2018 Q1
351
0
0
0.0
2017 Q4
1,501
0
0
0.0
2017 Q3
1,346
0
0
0.0
2017 Q2
712
0
0
0.0
2016 Q4
1,026
0
0
0.0
2016 Q3
1,163
0
0
0.0
2016 Q2
1,016
0
0
0.0
2016 Q1
2
0
0
0.0
2015 Q4
486
0
0
0.0
2015 Q3
1,577
0
0
0.0
2015 Q2
2,081
0
0
0.0
2015 Q1
575
0
0
0.0
2014 Q4
2,025
3
1
1481.5
2014 Q3
1,034
5
1
4835.6
2010 Q2
1
0
0
0.0
2010 Q1
1
0
0
0.0
2009 Q4
1
0
0
0.0
2009 Q3
1
0
0
0.0
2009 Q2
1
0
0
0.0
2009 Q1
1
0
0
0.0
2008 Q4
256
0
0
0.0
2008 Q3
724
0
0
0.0
2008 Q2
685
6
1
8759.1
2008 Q1
1
0
0
0.0
2007 Q4
679
0
0
0.0
2007 Q3
274
0
0
0.0
2007 Q2
1,749
6
0
3430.5
2007 Q1
1
0
0
0.0
2006 Q4
1
0
0
0.0
2006 Q3
675
0
0
0.0
2006 Q2
931
4
1
4296.5
2006 Q1
1
0
0
0.0
2005 Q4
613
0
0
0.0
2005 Q3
895
1
0
1117.3
2005 Q2
411
1
0
2433.1
2005 Q1
151
0
0
0.0
2004 Q4
326
0
0
0.0
2004 Q3
906
0
0
0.0
2004 Q2
831
0
0
0.0
2004 Q1
1
0
0
0.0
2003 Q4
619
0
0
0.0
2003 Q3
1,021
0
0
0.0
2003 Q2
766
0
0
0.0
2003 Q1
276
0
0
0.0
2002 Q4
1,611
0
0
0.0
2002 Q3
2,851
0
0
0.0
2002 Q2
2,151
3
0
1394.7
2002 Q1
1
0
0
0.0
2001 Q4
2,308
0
0
0.0
2001 Q3
3,103
1
0
322.3
2001 Q2
3,513
0
0
0.0
2001 Q1
1
0
0
0.0
2000 Q4
1,966
0
0
0.0
2000 Q3
2,555
0
0
0.0
2000 Q2
3,115
0
0
0.0
2000 Q1
870
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
1 on file
1988 · 1 incident
July 14, 1988ME · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorPOWERED HAULAGE
EMPLOYEES WERE PREPARING CONVEYOR FOR TRANSPORT. WHILE PLACING MATERIAL ON THE CONVEYOR WHICH WAS BEING HELD IN POSITION BY A LOADER THE CONVEYOR ROLLED FOWARD AWAY FROM THE LOADER CAUSING THE TOP END TO FALL ON OVER EMPLOYE CAUSING MULTIPLE INJURIES.
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