ACE Portable Plant has $5K in proposed MSHA penalties and $0 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
2017–2024
Latest incident
Jun 2024
Compliance record
MSHA citations since 2016
35
citations
10
significant & substantial
$5,019
proposed penalties
$5,019
paid to date
100% of proposed penalties paid to date, a $0 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: 376 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
ACE Portable Plant has $5K in proposed MSHA penalties and $0 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.
$5K
proposed penalties
$5K
current assessed
$5K
paid to date
$0
outstanding
35 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-04-07.
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.
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: 2026-04-08
33%
of limit-tested samples over the exposure limit
8
samples
3
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz41 over
Respirable dust, <.1mg4
Show the individual readings (8)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-12-03
Quartz, respirable, >1% Qtz
0.53
0.46
1.15
Bagging Operator
2026-04-08
Quartz, respirable, >1% Qtz
0.14
0.46
0.30
Bagging Operator
2026-04-08
Respirable dust, <.1mg
0
Kiln/Dryer Operator
2025-12-03
Respirable dust, <.1mg
0
Kiln/Dryer Operator
2025-08-25
Quartz, respirable, >1% Qtz
0.2
0.32
0.63
Kiln/Dryer Operator
2025-08-25
Respirable dust, <.1mg
0
Kiln/Dryer Operator
2019-08-08
Respirable dust, <.1mg
0
Bagging Operator
2019-08-08
Quartz, respirable, >1% Qtz
0.15
Bagging 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
5
2024
4
2023
10
2022
8
2021
7
2020
5
2019
6
2018
5
2017
5
2016
8
Source: MSHA quarterly employment and production, updated weekly.
ACE Portable Plant sits in Liberty County, Texas, where the Census mining category is 2.0% 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.
Liberty County, Texas · Population 97,993
2.0%
Mining share of county employment
$64,773
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
EE was shoveling out the bottom of a cup elevator when the blade of EE's shovel struck the side of the enclosure, with the impact sending a sharp pain up EE's left arm from the shovel.
2023 · 2 incidents
August 1, 2023TX · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDLING OF MATERIALS
While closing the door of end loader with left hand and bracing self with right hand on the door frame, employee closed the door on right hand causing crushing injury & fracture to end of right middle finger.
February 15, 2023TX · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDLING OF MATERIALS
Operator was attempting to replace drivebelts on a de-energized fan assembly for the dryer dust collection system. EE attempted to roll the belts onto the pulley when EE's left pinky became pinched between the belt and the pulley, severing the tip of that finger.
2021 · 1 incident
July 26, 2021TX · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDLING OF MATERIALS
Employee was assisting with manual installation of v-belt onto drive motor pulley assembly when fingers were pinched between the belt being installed and the pulley surface. Employee was not aware of hand position relative to the belt being installed. Employee had hand in an exposed position. This resulted in a crushing type injury middle and index fingers.
Employee was standing in the warehouse when EE reached into the right pant pocket with right hand to grab the radio when EE had a low back spasm causing EE to go down to one knee.
Injured left shoulder while using a breaker bar to remove bolts during plant disassembly around 2/22-26/2017. Initially thought shoulder was achy from exertion and did not report an injury until March 10, 2017 when diagnosed with rotator cuff tear in left shoulder.