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: 546 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘA Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
2
Section 107(a) orders
Most recent order: 2019-10-30.
On record since 2016.
Source: MSHA imminent-danger order records, updated weekly.
Plant 21 has $39K 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.
$39K
proposed penalties
$39K
current assessed
$39K
paid to date
$0
outstanding
147 assessments are final orders; 2 contested dockets.
Of $937 in penalties contested before the Commission, $937 was upheld in final decisions.
As of the most recent assessment on 2025-08-07.
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.
6citations taken to the federal commission · 4% of citations on record
Stood as issued
6 · 100%
0%
Penalty reduction in decided contests
$937 proposed, $937 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2008-03-05.
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: 2021-05-04, 5 years ago
0%
of limit-tested samples over the exposure limit
11
samples
2
limit-tested
Most sampled contaminants
Respirable dust, <.1mg9
Quartz, respirable, >1% Qtz2
Show the individual readings (11)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2021-05-04
Respirable dust, <.1mg
0
Cleanup Man
2021-05-04
Respirable dust, <.1mg
0
Front-end Loader Operator
2021-05-04
Respirable dust, <.1mg
0
Jackhammer Operator
2019-08-28
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-08-28
Respirable dust, <.1mg
0
Crusher Oper/Worker
2019-08-28
Respirable dust, <.1mg
0
Front-end Loader Operator
2015-09-17
Quartz, respirable, >1% Qtz
0.18
0.61
0.30
Crusher Oper/Worker
2015-09-17
Respirable dust, <.1mg
0
Crusher Oper/Worker
2015-09-17
Respirable dust, <.1mg
0
Drill Operator, Rotary Air
2009-10-20
Respirable dust, <.1mg
0
Front-end Loader Operator
2009-10-20
Quartz, respirable, >1% Qtz
0.33
0.92
0.36
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
3
2025
3
2024
4
2023
3
2022
3
2021
2
2020
3
2019
4
2018
6
2017
7
2016
5
2015
8
2014
6
2013
4
2012
5
2011
2
2010
2
2009
2
2008
0
2007
3
2006
1
2005
0
Source: MSHA quarterly employment and production, updated weekly.
Plant 21 sits in Clark County, Wisconsin, where the Census mining category is 0.3% 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.
Clark County, Wisconsin · Population 34,736
0.3%
Mining share of county employment
$66,250
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
3,699
0
0
0.0
2026 Q1
406
0
0
0.0
2025 Q4
891
0
0
0.0
2025 Q3
1,786
1
0
559.9
2025 Q2
1,149
0
0
0.0
2025 Q1
1
0
0
0.0
2024 Q4
996
0
0
0.0
2024 Q3
1,881
0
0
0.0
Show 59 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
1,403
0
0
0.0
2024 Q1
1
0
0
0.0
2023 Q4
1,365
1
1
732.6
2023 Q3
1,188
3
0
2525.3
2023 Q1
1
0
0
0.0
2022 Q4
966
0
0
0.0
2022 Q1
1
0
0
0.0
2021 Q3
488
0
0
0.0
2021 Q2
687
4
1
5822.4
2021 Q1
1
0
0
0.0
2020 Q4
216
0
0
0.0
2020 Q3
2,541
0
0
0.0
2020 Q2
2,791
4
1
1433.2
2020 Q1
1
0
0
0.0
2019 Q4
301
6
3
19933.6
2019 Q3
2,551
3
2
1176.0
2019 Q2
4,751
0
0
0.0
2019 Q1
0
0
0
2018 Q4
2,201
0
0
0.0
2018 Q3
1,901
3
1
1578.1
2018 Q2
4,891
0
0
0.0
2018 Q1
2,801
0
0
0.0
2017 Q4
5,001
0
0
0.0
2017 Q3
4,621
11
3
2380.4
2017 Q2
4,221
0
0
0.0
2016 Q4
3,421
0
0
0.0
2016 Q2
4,571
8
5
1750.2
2016 Q1
0
0
0
2015 Q4
3,400
0
0
0.0
2015 Q3
5,011
20
6
3991.2
2015 Q2
7,251
0
0
0.0
2015 Q1
1,101
0
0
0.0
2014 Q4
2,791
0
0
0.0
2014 Q3
4,481
0
0
0.0
2014 Q2
3,151
3
0
952.1
2014 Q1
1
0
0
0.0
2013 Q4
491
0
0
0.0
2013 Q3
2,900
2
0
689.7
2013 Q2
2,701
0
0
0.0
2013 Q1
1
0
0
0.0
2012 Q4
451
0
0
0.0
2012 Q3
3,051
0
0
0.0
2012 Q2
2,401
0
0
0.0
2011 Q4
601
4
1
6655.6
2011 Q3
643
13
5
20217.7
2011 Q2
431
0
0
0.0
2011 Q1
1
0
0
0.0
2010 Q4
586
0
0
0.0
2010 Q3
521
0
0
0.0
2010 Q2
676
0
0
0.0
2010 Q1
1
0
0
0.0
2009 Q4
648
6
2
9259.3
2009 Q3
780
16
2
20512.8
2009 Q2
702
0
0
0.0
2008 Q1
0
0
0
2007 Q4
1,360
10
1
7352.9
2007 Q2
764
0
0
0.0
2006 Q1
1
0
0
0.0
2005 Q1
0
0
0
No fatalities recorded at this mine.
Reportable incidents
1 on file
2019 · 1 incident
July 9, 2019WI · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
Technician was looking for an oil leak on the front of a generator engine and had the guards removed to better see the area in question. Technician stood up from the floor level after looking at the leak, lost balance, and got hand struck by the engine fan.