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: 184 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
OnCore 4 has $2K 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.
$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
14 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-02-04.
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: 2023-10-19
3
samples
0
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz1
Respirable dust, <.1mg1
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (3)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2023-10-19
Quartz, respirable, >1% Qtz
0.19
Laborer, Bullgang
2023-10-19
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-10-19
Unlisted Particulate, respirable, <1% Qtz
0.16
Front-end Loader 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.
OnCore 4 recorded 0.00 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.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In Texas, metal and nonmetal mining averaged 1.17 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 *
0.00
0.00
0.000
2024 *
3.99
0.00
0.000
2023 *
0.00
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
25
2025
25
2024
24
2023
23
2022
20
Source: MSHA quarterly employment and production, updated weekly.
OnCore 4 sits in Midland County, Texas, where the Census mining category is 19.1% 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.
Midland County, Texas · Population 171,496
19.1%
Mining share of county employment
$93,984
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
17,117
0
0
0.0
2026 Q1
14,474
1
0
69.1
2025 Q4
15,390
0
0
0.0
2025 Q3
11,457
1
0
87.3
2025 Q2
12,591
0
0
0.0
2025 Q1
11,865
3
0
252.8
2024 Q4
13,175
0
0
0.0
2024 Q3
12,160
0
0
0.0
Show 8 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
12,342
1
0
81.0
2024 Q1
12,387
0
0
0.0
2023 Q4
12,008
3
1
249.8
2023 Q3
12,123
0
0
0.0
2023 Q2
14,253
0
0
0.0
2023 Q1
12,204
0
0
0.0
2022 Q4
11,024
0
0
0.0
2022 Q3
12,522
2
0
159.7
No fatalities recorded at this mine.
Reportable incidents
2 on file
2026 · 1 incident
July 11, 2026TX · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
The employee was working on the CC1 belt and picked up a wrench to pass it to a coworker positioned above EE. While passing the wrench, it struck the machine guard, causing the wrench to rebound and hit the employee in the mouth. The employee sustained an injury to the mouth as a result of the impact. Employee was seen by Dentist 7/28/26 a root canal was performed today