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: 193 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 #4 has $4K 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.
$4K
proposed penalties
$3K
current assessed
$3K
paid to date
$0
outstanding
22 assessments are final orders; 2 contested dockets.
Of $1K in penalties contested before the Commission, $312 was upheld in final decisions.
As of the most recent assessment on 2014-05-07.
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.
4citations taken to the federal commission · 18% of citations on record
Settled
3 · 75%
Vacated or withdrawn
1 · 25%
67%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 3 decided S&S contests · industry: 79%
69%
Penalty reduction in decided contests
$1K proposed, $312 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2013-06-18.
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: 2014-05-08, 12 years ago
0%
of limit-tested samples over the exposure limit
15
samples
11
limit-tested
Most sampled contaminants
Nuisance dust, respirable, <1% Qtz7
Quartz, respirable, >1% Qtz4
Respirable dust, <.1mg4
Show the individual readings (15)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2014-05-08
Quartz, respirable, >1% Qtz
0.47
1.85
0.25
Bulldozer Operator
2014-05-08
Nuisance dust, respirable, <1% Qtz
0.13
10
0.01
Truck Driver
2014-05-08
Quartz, respirable, >1% Qtz
0.17
1.63
0.10
Truck Driver
2012-03-14
Respirable dust, <.1mg
0
Truck Driver
2012-03-14
Nuisance dust, respirable, <1% Qtz
1.78
10
0.18
Crusher Oper/Worker
2012-03-14
Nuisance dust, respirable, <1% Qtz
0.29
10
0.03
Truck Driver
2012-03-14
Respirable dust, <.1mg
0
Front-end Loader Operator
2012-03-14
Respirable dust, <.1mg
0
Drill Operator, Rotary
2010-05-25
Nuisance dust, respirable, <1% Qtz
1.67
10
0.17
Crusher Oper/Worker
2010-05-25
Nuisance dust, respirable, <1% Qtz
0.14
10
0.01
Front-end Loader Operator
2010-05-25
Respirable dust, <.1mg
0
Truck Driver
2010-05-25
Quartz, respirable, >1% Qtz
0.38
2.56
0.15
Truck Driver
2008-08-06
Nuisance dust, respirable, <1% Qtz
0.14
10
0.01
Truck Driver
2008-08-06
Quartz, respirable, >1% Qtz
0.24
2.19
0.11
Truck Driver
2008-08-06
Nuisance dust, respirable, <1% Qtz
0.3
10
0.03
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
2015
2
2014
8
2013
9
2012
6
2011
8
2010
7
2009
7
2008
12
Source: MSHA quarterly employment and production, updated weekly.
Portable Plant #4 sits in Benton County, Missouri, where the Census mining category is 0.1% 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.
Benton County, Missouri · Population 19,887
0.1%
Mining share of county employment
$52,200
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
2015 Q3
1,262
0
0
0.0
2015 Q2
1,107
0
0
0.0
2015 Q1
843
0
0
0.0
2014 Q4
1,419
0
0
0.0
2014 Q3
6,582
0
0
0.0
2014 Q2
5,210
2
1
383.9
2014 Q1
864
0
0
0.0
2013 Q4
1,179
1
0
848.2
Show 19 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2013 Q3
6,149
0
0
0.0
2013 Q2
7,808
2
2
256.1
2013 Q1
1,726
0
0
0.0
2012 Q4
1,299
0
0
0.0
2012 Q3
5,884
0
0
0.0
2012 Q2
1,473
0
0
0.0
2012 Q1
1,472
1
0
679.3
2011 Q4
2,965
0
0
0.0
2011 Q3
5,296
0
0
0.0
2011 Q2
4,763
4
0
839.8
2011 Q1
988
0
0
0.0
2010 Q4
6,676
0
0
0.0
2010 Q3
3,203
0
0
0.0
2010 Q2
2,617
2
1
764.2
2010 Q1
821
0
0
0.0
2009 Q2
1,019
0
0
0.0
2009 Q1
3,559
0
0
0.0
2008 Q4
5,315
0
0
0.0
2008 Q3
6,885
10
2
1452.4
No fatalities recorded at this mine.
Reportable incidents
1 on file
2012 · 1 incident
April 25, 2012MO · Metal/Non-Metalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverSLIP OR FALL OF PERSON
Employee was walking while working at the quarry and slipped on level surface and fell to the ground. The employee was taken to the hospital for evaluation and was found to have a left knee strain. The employee was released from care with modified duty and a prescription.