Portable Plant No. 1 has $8K in proposed MSHA penalties and $793 outstanding across 2 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
4
Years on record
1990–2000
Latest incident
Sep 2000
Compliance record
MSHA citations since 2001
69
citations
12
significant & substantial
$7,927
proposed penalties
$6,967
paid to date
88% of proposed penalties paid to date, a $960 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: 404 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Portable Plant No. 1 has $8K in proposed MSHA penalties and $793 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.
$8K
proposed penalties
$8K
current assessed
$7K
paid to date
$793
outstanding
62 assessments are final orders; 2 contested dockets.
Of $497 in penalties contested before the Commission, $330 was upheld in final decisions.
As of the most recent assessment on 2026-07-28.
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 · 6% of citations on record
Settled
3 · 75%
Vacated or withdrawn
1 · 25%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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%
43%
Penalty reduction in decided contests
$387 proposed, $220 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 2004-10-05.
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: 2014-10-28, 11 years ago
0%
of limit-tested samples over the exposure limit
7
samples
4
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz4
Respirable dust, <.1mg2
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (7)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2014-10-28
Quartz, respirable, >1% Qtz
0.2
0.48
0.42
Laborer, Bullgang
2014-10-28
Quartz, respirable, >1% Qtz
0.14
0.77
0.18
Front-end Loader Operator
2014-10-28
Quartz, respirable, >1% Qtz
0.15
0.57
0.26
Front-end Loader Operator
2010-06-17
Quartz, respirable, >1% Qtz
0.16
0.45
0.36
Crusher Oper/Worker
2010-06-17
Respirable dust, <.1mg
0
Front-end Loader Operator
2001-12-13
Unlisted Particulate, respirable, <1% Qtz
0.28
Crusher Oper/Worker
2001-12-13
Respirable dust, <.1mg
0
Backhoe 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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
4
2025
6
2024
6
2023
4
2022
5
2021
5
2020
3
2019
6
2018
1
2017
4
2016
1
2015
3
2014
2
2013
3
2012
4
2011
3
2010
3
2009
3
2008
2
2007
5
2006
3
2005
2
2004
4
2003
4
2002
4
2001
4
2000
4
Source: MSHA quarterly employment and production, updated weekly.
Portable Plant No. 1 sits in Lincoln County, Wisconsin, 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.
Lincoln County, Wisconsin · Population 28,403
0.0%
Mining share of county employment
$67,726
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
1,627
0
0
0.0
2026 Q1
1
0
0
0.0
2025 Q4
631
0
0
0.0
2025 Q3
702
0
0
0.0
2025 Q2
1,395
3
0
2150.5
2025 Q1
259
0
0
0.0
2024 Q4
931
0
0
0.0
2024 Q3
791
8
0
10113.8
Show 97 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
1,332
0
0
0.0
2024 Q1
146
0
0
0.0
2023 Q4
192
0
0
0.0
2023 Q3
1,462
3
1
2052.0
2023 Q2
1,474
0
0
0.0
2023 Q1
0
0
0
2022 Q4
200
0
0
0.0
2022 Q3
293
0
0
0.0
2022 Q2
1,092
0
0
0.0
2022 Q1
147
0
0
0.0
2021 Q4
790
0
0
0.0
2021 Q3
1,001
0
0
0.0
2021 Q2
1,721
0
0
0.0
2021 Q1
0
0
0
2020 Q4
449
0
0
0.0
2020 Q3
730
0
0
0.0
2020 Q2
830
3
0
3614.5
2020 Q1
0
0
0
2019 Q4
649
0
0
0.0
2019 Q3
954
0
0
0.0
2019 Q2
1,429
0
0
0.0
2019 Q1
0
0
0
2018 Q4
0
0
0
2018 Q3
0
0
0
2018 Q2
264
0
0
0.0
2018 Q1
0
0
0
2017 Q4
251
0
0
0.0
2017 Q3
769
5
0
6502.0
2017 Q2
408
0
0
0.0
2017 Q1
0
0
0
2016 Q4
0
0
0
2016 Q3
0
1
0
2016 Q2
85
0
0
0.0
2016 Q1
0
0
0
2015 Q4
407
0
0
0.0
2015 Q3
1,056
0
0
0.0
2015 Q2
361
0
0
0.0
2015 Q1
0
0
0
2014 Q4
378
4
1
10582.0
2014 Q3
831
0
0
0.0
2014 Q2
445
3
0
6741.6
2014 Q1
0
0
0
2013 Q4
481
0
0
0.0
2013 Q3
1,291
7
2
5422.2
2013 Q2
1,137
0
0
0.0
2013 Q1
0
0
0
2012 Q4
672
0
0
0.0
2012 Q3
1,070
0
0
0.0
2012 Q2
2,229
6
1
2691.8
2012 Q1
64
0
0
0.0
2011 Q4
649
0
0
0.0
2011 Q3
1,104
0
0
0.0
2011 Q2
1,071
0
0
0.0
2011 Q1
0
0
0
2010 Q4
511
0
0
0.0
2010 Q3
197
0
0
0.0
2010 Q2
520
0
0
0.0
2010 Q1
152
0
0
0.0
2009 Q4
957
0
0
0.0
2009 Q3
688
0
0
0.0
2009 Q2
219
2
0
9132.4
2009 Q1
20
0
0
0.0
2008 Q4
20
0
0
0.0
2008 Q3
20
0
0
0.0
2008 Q2
993
1
1
1007.0
2008 Q1
20
0
0
0.0
2007 Q4
333
0
0
0.0
2007 Q3
1,768
0
0
0.0
2007 Q2
1,060
0
0
0.0
2007 Q1
410
0
0
0.0
2006 Q4
935
0
0
0.0
2006 Q3
1,571
0
0
0.0
2006 Q2
1,192
2
1
1677.9
2006 Q1
1,205
0
0
0.0
2005 Q4
1,165
0
0
0.0
2005 Q3
1,372
4
1
2915.5
2005 Q2
1,214
0
0
0.0
2005 Q1
0
0
0
2004 Q4
1,158
0
0
0.0
2004 Q3
1,718
11
3
6402.8
2004 Q2
1,762
0
0
0.0
2004 Q1
386
0
0
0.0
2003 Q3
743
0
0
0.0
2003 Q2
2,141
0
0
0.0
2003 Q1
412
0
0
0.0
2002 Q4
1,650
0
0
0.0
2002 Q3
2,193
0
0
0.0
2002 Q2
2,006
0
0
0.0
2002 Q1
491
0
0
0.0
2001 Q4
1,731
2
0
1155.4
2001 Q3
1,570
0
0
0.0
2001 Q2
2,089
3
1
1436.1
2001 Q1
581
0
0
0.0
2000 Q4
1,848
0
0
0.0
2000 Q3
2,300
0
0
0.0
2000 Q2
1,464
0
0
0.0
2000 Q1
227
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
4 on file
2000 · 1 incident
September 20, 2000WI · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
EMPLOYEE WAS PREPARING THE PARKER PRIMARY PLANT TO BE MOVED TO ANOTHER LOCATION AND BENT OVER TO LIFT A TIMEBER (BLOCKING). HE EXPERIENCED PAIN AND WENT TO THE GROUND IN PAIN. HE HAS HAD BAC K RELATED INJURIES IN THE PAST AND IT JUST SNAPPED. DR TOLD HIM HE HAS A TORN MUSCLE ON LEFT SIDE OF HIS BACK.
1990 · 3 incidents
November 27, 1990WI · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON
AT BEGINNING OF WORKDAY,I.NAME HELPS START UP THE EQUIP.AFTER STARTING ENGINE ON CRUSHER HE WAS GOING DOWN THE LADDER AND SLIPPED ON A FROSTY STEP FALLING TO GROUND BELOW 4-5' INJURING HIS BAC K.HE FELT IT WAS ONLY A BRUISE AND CONTINUED TO WORK THROUGH THE DAY AND THE FOLLOWING 2 DAYS BEFORE SEEKING MEDICAL ATTENTION.
July 16, 1990WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanPOWERED HAULAGE
EMPLOYEE IS RESPONSIBLE FOR KEEPING CONVEYOR OPERATING SMOOTHLY AND FOR GROUND CLEAM UP OF EXCESS GRAVEL AND OTHER MATERIAL. EMPLOYEE WAS UNAWARE OF ROCK BEING CAUGHT IN CONVEYOR. THE ROCK CAU SED THE CONVEYOR GUARD TO SPRING OUTWARD. THE GUARD HIT HIM IN THE RIGHT THIGH CAUSING A BRUISED THIGH. EMPLOYEE RECEIVED FIRST-AID TREATMENT AT GOOD SAMARITAN HEALTH CARE CENTER, MERRILL, WI
April 6, 1990WI · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorOTHER
WHILE STOCKPILING GRAVEL WITH AN ENDLOADER,DUST AND DIRT FROM THE CRUSHING OPERATION INTO HIS EYES CAUSING DISCOMFORT AND WATERING.EXTREMELY WINDY AND DRY CONDITIONS WERE CONTRIBUTING FACTORS TO THE INJURY.INJURED EMPLOYEE CONSULTED A PHYSICIAN AND AN EYE WASH WAS PRESCRIBED.