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: 279 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 1 has $28K 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.
$28K
proposed penalties
$28K
current assessed
$28K
paid to date
$0
outstanding
67 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-05-19.
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: 2022-06-09, 4 years ago
4
samples
0
limit-tested
Most sampled contaminants
Respirable dust, <.1mg3
Quartz, respirable, >1% Qtz1
Show the individual readings (4)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2022-06-09
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-06-09
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-06-09
Quartz, respirable, >1% Qtz
0.26
Utility Man
2022-06-09
Respirable dust, <.1mg
0
Utility Man
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 1 recorded 3.72 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.
3.72
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 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 *
3.72
0.00
0.000
2024 *
0.00
0.00
0.000
2023 *
0.00
0.00
0.000
2022 *
7.21
0.00
0.000
2021 *
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
23
2025
27
2024
26
2023
31
2022
23
2021
22
2020
15
Source: MSHA quarterly employment and production, updated weekly.
OnCore 1 sits in Howard County, Texas, where the Census mining category is 11.7% 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.
Howard County, Texas · Population 33,127
11.7%
Mining share of county employment
$71,457
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
There was very hot temperatures in West Texas on this day. The temperature was 103 degrees at time of the incident. Employees Air conditioner was not properly working throughout the day in the Haul truck. The heat caused the employer to pull over on the side of the haul road, where 30 minutes later EE was found passed out from heat.
2025 · 1 incident
January 17, 2025TX · Metal/Non-Metalmine manager, mine foreman, mine ownerMACHINERY
Employee was utilizing a grinder to cut a bearing sleeve. This task was necessary to replace the bearing on the head pulley of the C1 belt. Midway through the task, the grinder unexpectedly kicked back towards the employee, causing the grinder's disk to make contact with the employee's left forearm resulting in a laceration.
2023 · 2 incidents
August 25, 2023TX · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerOTHER
Individual was greasing excavator prior to working and outdoor conditions were windy and dry. EE recalls sand blowing into right eye. EE attempted to wipe it away and believed EE had done so. Reported to manager on 28 Aug as EE felt EE needed to get medical attention to the eye.
March 13, 2023TX · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
While replacing a damaged digger tooth on excavator bucket, as hammer was swung it impacted corner of tooth and broke off and entered right hand between thumb and index finger (Crotch of hand).
While climbing down the ladder, IP right foot slipped off the last step (rung) on the ladder. IP attempted to catch self resulting in a strain to EE's right elbow. Incident occurred on 06/28/22, reported on 06/29/2022 First Aid Case. Seen by MD on 07/06/2022.