Liberty Portable Plant has $4K in proposed MSHA penalties and $100 outstanding across 0 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
7
Years on record
2009–2025
Latest incident
Oct 2025
Compliance record
MSHA citations since 2007
30
citations
4
significant & substantial
$4,106
proposed penalties
$4,006
paid to date
98% of proposed penalties paid to date, a $100 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: 588 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Liberty Portable Plant has $4K in proposed MSHA penalties and $100 outstanding across 0 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
$4K
current assessed
$4K
paid to date
$100
outstanding
30 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-03-18.
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.
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: 2025-02-05
0%
of limit-tested samples over the exposure limit
32
samples
14
limit-tested
Most sampled contaminants
Respirable dust, <.1mg17
Quartz, respirable, >1% Qtz9
Nuisance dust, respirable, <1% Qtz6
Show the individual readings (32)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-02-05
Respirable dust, <.1mg
0
Front-end Loader Operator
2025-02-05
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-08-01
Quartz, respirable, >1% Qtz
0.21
Front-end Loader Operator
2023-08-01
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-08-01
Respirable dust, <.1mg
0
Front-end Loader Operator
2015-10-28
Respirable dust, <.1mg
0
Supervisor, Co. Official
2015-10-28
Respirable dust, <.1mg
0
Front-end Loader Operator
2015-10-28
Quartz, respirable, >1% Qtz
0.35
1.72
0.20
Front-end Loader Operator
2015-10-28
Nuisance dust, respirable, <1% Qtz
0.35
10
0.04
Front-end Loader Operator
2013-06-19
Quartz, respirable, >1% Qtz
0.25
2.25
0.11
Truck Driver
2013-06-19
Respirable dust, <.1mg
0
Complete Load-Haul-Dump
2013-06-19
Nuisance dust, respirable, <1% Qtz
0.22
10
0.02
Front-end Loader Operator
2013-06-19
Nuisance dust, respirable, <1% Qtz
0.43
10
0.04
Front-end Loader Operator
2013-06-19
Quartz, respirable, >1% Qtz
1.83
2.3
0.80
Supervisor, Co. Official
2012-12-27
Respirable dust, <.1mg
0
Drill Operator, Rotary Air
2012-12-27
Quartz, respirable, >1% Qtz
0.29
2.21
0.13
Complete Load-Haul-Dump
2012-12-27
Respirable dust, <.1mg
0
Front-end Loader Operator
2012-12-27
Respirable dust, <.1mg
0
Front-end Loader Operator
2010-12-15
Respirable dust, <.1mg
0
Front-end Loader Operator
2010-12-15
Respirable dust, <.1mg
0
Supervisor, Co. Official
2010-12-15
Nuisance dust, respirable, <1% Qtz
0.29
10
0.03
Front-end Loader Operator
2010-12-15
Respirable dust, <.1mg
0
Front-end Loader Operator
2008-08-05
Nuisance dust, respirable, <1% Qtz
0.19
10
0.02
Truck Driver
2008-08-05
Respirable dust, <.1mg
0
Truck Driver
2008-08-05
Respirable dust, <.1mg
0
Front-end Loader Operator
2008-08-05
Quartz, respirable, >1% Qtz
0.51
3.13
0.16
Front-end Loader Operator
2008-08-05
Quartz, respirable, >1% Qtz
0.87
2.94
0.30
Laborer, Bullgang
2007-11-14
Quartz, respirable, >1% Qtz
0.37
0.94
0.39
Front-end Loader Operator
2007-11-14
Respirable dust, <.1mg
0
Front-end Loader Operator
2007-11-14
Respirable dust, <.1mg
0
Front-end Loader Operator
2007-02-27
Nuisance dust, respirable, <1% Qtz
0.28
10
0.03
Cleanup Man
2007-02-27
Quartz, respirable, >1% Qtz
0.6
2.25
0.27
Mechanic
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.
Liberty Portable Plant recorded 0.00 reportable injury cases per 100 full-time workers in 2024.
Injury rate, 2024
ⓘThis rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 1.77 and the all-US-mining average was 2.08 cases per 100 workers.
In Missouri, metal and nonmetal mining averaged 2.74 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year
total case rate
days-away
fatal
2024 *
0.00
0.00
0.000
2023 *
0.00
0.00
0.000
2022 *
0.00
0.00
0.000
2021 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2018 *
0.00
0.00
0.000
2017 *
8.56
0.00
0.000
2016 *
8.57
0.00
0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
17
2025
11
2024
12
2023
11
2022
12
2021
12
2020
10
2019
12
2018
10
2017
11
2016
10
2015
15
2014
11
2013
11
2012
10
2011
10
2010
10
2009
9
2008
14
2007
17
2006
18
2005
18
2004
13
Source: MSHA quarterly employment and production, updated weekly.
Liberty Portable Plant sits in Osage 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.
Osage County, Missouri · Population 13,379
0.1%
Mining share of county employment
$75,355
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
Employee straightened after stemming a hole and felt a sharp pain in EE's right pectoral muscle that didn't go away for the rest of the day. Commented on it to 2 other EE's. Dull ache with certain movements triggering more intense pain. Worsened over the weekend.
2020 · 2 incidents
June 29, 2020MO · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorMACHINERY
Employee was adjusting impact crusher and one employee was raising and lowering cylinder and other employee was turning nut. When the one employee turned the nut the other employee pushed lever to lower cylinder, the other employee stuck hand back in quickly to re adjust and smashed two finger tips
Employee walked up a bank to spray paint boundary line and turned to walked back down and feet came out from underneath EE and jarred EE's neck.
2017 · 1 incident
October 5, 2017MO · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
The EE was in the process of locking up site. He walked over to the pit area and had to close the sliding gate and lock it. While doing so the EE pinched his two fingers between two fixed pieces of metal causing a small cut on 2 fingers. The EE received stitches at the local hospital.
2009 · 1 incident
February 12, 2009MO · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerDISORDERS (REPEATED TRAUMA)
Employee stated that he skipped the 2007 hearing test so two years went by between tests. He stated that he had been wearing all hearing protection needed while running equipment. He believes his age has played a part in the hearing loss.