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: 235 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Nobles Aggregate has $8K 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.
$8K
proposed penalties
$8K
current assessed
$8K
paid to date
$0
outstanding
41 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-03-17.
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: 2026-08-05
33%
of limit-tested samples over the exposure limit
5
samples
3
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz41 over
Respirable dust, <.1mg1
Show the individual readings (5)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-08-05
Quartz, respirable, >1% Qtz
1.72
1.06
1.62
Laborer, Bullgang
2026-08-05
Quartz, respirable, >1% Qtz
0.32
1.09
0.29
Laborer, Bullgang
2026-08-05
Quartz, respirable, >1% Qtz
0.48
1.03
0.47
Front-end Loader Operator
2018-11-15
Respirable dust, <.1mg
0
Supervisor, Co. Official
2018-11-15
Quartz, respirable, >1% Qtz
0.37
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.
Nobles Aggregate recorded 3.93 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.
3.93
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 *
3.93
0.00
0.000
2024 *
4.01
0.00
0.000
2023 *
5.39
5.39
0.000
2022 *
0.00
0.00
0.000
2019 *
9.81
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
41
2025
32
2024
22
2023
20
2022
14
2021
17
2020
9
2019
8
2018
9
Source: MSHA quarterly employment and production, updated weekly.
Nobles Aggregate 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
23,088
0
0
0.0
2026 Q1
20,487
3
0
146.4
2025 Q4
4,958
0
0
0.0
2025 Q3
19,966
3
0
150.3
2025 Q2
19,546
0
0
0.0
2025 Q1
6,358
0
0
0.0
2024 Q4
20,486
7
0
341.7
2024 Q3
14,195
4
0
281.8
Show 21 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
6,471
0
0
0.0
2024 Q1
8,776
0
0
0.0
2023 Q4
9,281
4
0
431.0
2023 Q3
10,272
0
0
0.0
2023 Q2
10,197
4
0
392.3
2023 Q1
7,381
0
0
0.0
2022 Q4
7,699
0
0
0.0
2022 Q3
6,754
0
0
0.0
2022 Q2
7,014
0
0
0.0
2022 Q1
6,416
8
2
1246.9
2021 Q4
12,229
0
0
0.0
2021 Q1
5,323
0
0
0.0
2020 Q4
5,860
0
0
0.0
2020 Q2
1,767
0
0
0.0
2020 Q1
7,093
0
0
0.0
2019 Q4
10
0
0
0.0
2019 Q3
7,459
0
0
0.0
2019 Q2
5,604
0
0
0.0
2019 Q1
7,304
0
0
0.0
2018 Q4
5,991
4
0
667.7
2018 Q3
3,036
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
7 on file
2026 · 2 incidents
April 2, 2026TX · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDTOOLS (NONPOWERED)
Employee #1 was standing near Employee #2, who was using a hammer to remove a bearing from the manlift. Employee #1 suddenly felt pain in EE's wrist and, upon lifting EE's sleeve, observed a small cut. EE was transported to Excel ER, where an X-ray revealed a small piece of metal embedded in EE's right wrist.
An employee was using a 4-inch angle grinder when debris went underneath EE's safety glasses and irritated EE's right eye. The employee stated EE could not use face shield at the time because EE was in very tight quarters while grinding. The employee was taken to E.R., where EE's eye was flushed and the debris removed. EE was given a full release with no restrictions.
Employee overfilled the Diesel Exhaust Fluid tank (DEF), causing it to spill on their clothing & glasses. A drop of DEF entered left eye. They immediately flushed with water, then changed into clean clothes. They requested a medical evaluation to ensure eye was okay. They were taken to ER, where they were examined & medically cleared to return to work without restrictions.
Employee cleaning under tail pulley of HSI motor, saw a hanging drive belt, informed crew. While assisting with belt replacement, 2nd employee cut belt while 1st employee's hand was under drive motor. Drive motor held in place by belt & a pivoting bracket. Once belt was cut, motor pivoted, landing on employee's hand, smashing it. The employee was taken to ER for treatment.
2023 · 1 incident
January 10, 2023TX · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON
Employee fractured right leg while helping load equipment onto a low boy trailer. They stepped into a hole where a wood plank was missing. They fell off the trailer and their foot stayed in the hole.