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: 465 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
OZARK has $20K 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.
$20K
proposed penalties
$20K
current assessed
$20K
paid to date
$0
outstanding
68 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-04-01.
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: 2026-03-31
0%
of limit-tested samples over the exposure limit
18
samples
8
limit-tested
Most sampled contaminants
Respirable dust, <.1mg10
Quartz, respirable, >1% Qtz8
Show the individual readings (18)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-03-31
Quartz, respirable, >1% Qtz
0.33
1.37
0.24
Crusher Oper/Worker
2026-03-31
Quartz, respirable, >1% Qtz
0.41
1.1
0.37
Front-end Loader Operator
2026-03-31
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-09-20
Respirable dust, <.1mg
0
Supervisor, Co. Official
2023-09-20
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-09-20
Respirable dust, <.1mg
0
Rotary Bucket Ex. Operator
2023-09-20
Respirable dust, <.1mg
0
Truck Driver
2017-09-19
Quartz, respirable, >1% Qtz
0.39
0.54
0.72
Front-end Loader Operator
2017-09-19
Respirable dust, <.1mg
0
Crusher Oper/Worker
2017-09-19
Quartz, respirable, >1% Qtz
0.36
0.41
0.88
Truck Driver
2014-10-29
Respirable dust, <.1mg
0
Crusher Oper/Worker
2014-10-29
Quartz, respirable, >1% Qtz
0.22
0.4
0.55
Supervisor, Co. Official
2014-10-29
Respirable dust, <.1mg
0
Supervisor, Co. Official
2014-10-29
Respirable dust, <.1mg
0
Front-end Loader Operator
2014-10-29
Respirable dust, <.1mg
0
Front-end Loader Operator
2014-10-29
Quartz, respirable, >1% Qtz
0.25
0.42
0.60
Truck Driver
2014-10-29
Quartz, respirable, >1% Qtz
0.16
0.25
0.64
Utility Man
2014-10-29
Quartz, respirable, >1% Qtz
0.13
0.37
0.35
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.
OZARK recorded 9.35 reportable injury cases per 100 full-time workers in 2025.
Injury rate, 2025
ⓘ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.
9.35
total case rate
0.00
days-away rate
0.000
fatality rate
Above average. The US metal and nonmetal mining average was 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In Arkansas, metal and nonmetal mining averaged 1.60 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
2025 *
9.35
0.00
0.000
2024 *
0.00
0.00
0.000
2022 *
0.00
0.00
0.000
2021 *
7.29
3.64
0.000
2020 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2018 *
0.00
0.00
0.000
2016 *
9.74
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
10
2025
8
2024
8
2023
7
2022
11
2021
21
2020
13
2019
11
2018
10
2017
8
2016
9
2015
8
2014
7
2013
7
Source: MSHA quarterly employment and production, updated weekly.
OZARK sits in Logan County, Arkansas, where the Census mining category is 1.4% 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.
Logan County, Arkansas · Population 21,240
1.4%
Mining share of county employment
$54,237
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 changing a tail pully bearing. EE was holding the shaft up with a bar while cleaning it for reassembly. When bar slipped off of the shaft and pinched left index finger between shaft and conv. frame.
Employee was cutting a doorway in a cargo container with a hand grinder. The steel pinched the wheel and the grinder slipped hitting EE in the leg requiring 5 staples.