Cobra Stone Lueders Quarry: 95 MSHA citations Metal/Non-Metal
Cobra Stone Inc.
· Surface
Controlled by
Pedro E Aguado
Lueders,
Shackelford County,
TX
·
Active
MSHA Mine ID: 4104818
Cobra Stone Lueders Quarry has $51K in proposed MSHA penalties and $849 outstanding across 1 contested dockets, plus health sampling and the full incident record.
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2010
95
citations
29
significant & substantial
$50,843
proposed penalties
$49,994
paid to date
98% of proposed penalties paid to date, a $849 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2010
39
inspections on record
528
inspection hours
n/a
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: 528 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Cobra Stone Lueders Quarry has $51K in proposed MSHA penalties and $849 outstanding across 1 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.$51K
proposed penalties
$51K
current assessed
$50K
paid to date
$849
outstanding
90 assessments are final orders; 1 contested dockets.
Of $2K in penalties contested before the Commission, $2K was upheld in final decisions.
As of the most recent assessment on 2026-06-10.
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.30.5%
significant & substantial
5.3%
high negligence or reckless
30.5%
reasonably likely or greater
26.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 6.3% low, 88.4% moderate, 5.3% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
ⓘ
Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
1
citations taken to the federal commission · 1% of citations on record
- Settled 1 · 100%
100%
S&S designation survived the contest
ⓘ
Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.of 1 decided S&S contests · industry: 79%
0%
Penalty reduction in decided contests
$2K proposed, $2K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2011-06-14.
Contested penalties
ⓘ
A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
| Docket | Decision | Judge | Year | Proposed / upheld |
|---|---|---|---|---|
| CENT 2011-857M | Settlement | Lesnick | 2011 | $2K → $2K |
Source: FMSHRC civil penalty dockets and decisions (public record), 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: 2025-06-04
ⓘ
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.0%
of limit-tested samples over the exposure limit
11
samples
3
limit-tested
Most sampled contaminants
- Respirable dust, <.1mg6
- Quartz, respirable, >1% Qtz4
- Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (11)
| Date | Contaminant | Concentration | Limit | Conc / limit | Occupation |
|---|---|---|---|---|---|
| 2025-06-04 | Respirable dust, <.1mg | 0 | Cutting Mach Operator | ||
| 2025-06-04 | Respirable dust, <.1mg | 0 | Cutting Mach Operator | ||
| 2025-06-04 | Quartz, respirable, >1% Qtz | 0.17 | Cutting Mach Operator | ||
| 2025-06-04 | Respirable dust, <.1mg | 0 | Cutting Mach Operator | ||
| 2019-04-30 | Unlisted Particulate, respirable, <1% Qtz | 0.13 | Bobcat Operator | ||
| 2019-04-30 | Respirable dust, <.1mg | 0 | Laborer, Bullgang | ||
| 2019-04-30 | Respirable dust, <.1mg | 0 | Stone Polisher/Cutter | ||
| 2015-08-19 | Quartz, respirable, >1% Qtz | 0.69 | 1.55 | 0.45 | Laborer, Bullgang |
| 2015-08-19 | Quartz, respirable, >1% Qtz | 0.87 | 1.34 | 0.65 | Front-end Loader Operator |
| 2015-08-19 | Respirable dust, <.1mg | 0 | Cutting Mach Operator | ||
| 2015-08-19 | Quartz, respirable, >1% Qtz | 0.82 | 1.38 | 0.59 | Forklift 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.
Cobra Stone Lueders Quarry 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
No reportable injury cases in any year shown. Employee-hours were reported in each of those years, so these are true zeros rather than missing data. Citations, listed in the compliance record above, are inspector-found violations and are counted separately from worker injuries.
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.
| Year | total case rate | days-away | fatal |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.000 |
| 2024 | 0.00 | 0.00 | 0.000 |
| 2023 | 0.00 | 0.00 | 0.000 |
| 2021 * | 0.00 | 0.00 | 0.000 |
| 2020 * | 0.00 | 0.00 | 0.000 |
| 2019 | 0.00 | 0.00 | 0.000 |
| 2018 | 0.00 | 0.00 | 0.000 |
| 2017 | 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.
Ownership history
- Cobra Stone Inc. 2010 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
| Year | Employees |
|---|---|
| 2026 | 87 |
| 2025 | 43 |
| 2024 | 51 |
| 2023 | 44 |
| 2022 | 42 |
| 2021 | 14 |
| 2020 | 13 |
| 2019 | 34 |
| 2018 | 25 |
| 2017 | 54 |
| 2016 | 23 |
| 2015 | 40 |
| 2014 | 26 |
| 2013 | 12 |
| 2012 | 10 |
| 2011 | 6 |
| 2010 | 7 |
Source: MSHA quarterly employment and production, updated weekly.
Cobra Stone Lueders Quarry sits in Shackelford County, Texas, where the Census mining category is 11.5% 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.Shackelford County, Texas · Population 3,169
11.5%
Mining share of county employment
$64,659
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 | 61,693 | 5 | 1 | 81.0 |
| 2026 Q1 | 66,712 | 0 | 0 | 0.0 |
| 2025 Q4 | 18,013 | 1 | 0 | 55.5 |
| 2025 Q3 | 35,978 | 0 | 0 | 0.0 |
| 2025 Q2 | 38,478 | 2 | 0 | 52.0 |
| 2025 Q1 | 37,946 | 4 | 3 | 105.4 |
| 2024 Q4 | 40,893 | 0 | 0 | 0.0 |
| 2024 Q3 | 34,151 | 0 | 0 | 0.0 |
Show 55 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2024 Q2 | 43,459 | 9 | 3 | 207.1 |
| 2024 Q1 | 36,615 | 0 | 0 | 0.0 |
| 2023 Q4 | 34,944 | 2 | 0 | 57.2 |
| 2023 Q3 | 30,901 | 10 | 2 | 323.6 |
| 2023 Q2 | 32,040 | 0 | 0 | 0.0 |
| 2023 Q1 | 43,604 | 0 | 0 | 0.0 |
| 2022 Q2 | 26,223 | 0 | 0 | 0.0 |
| 2022 Q1 | 41,648 | 0 | 0 | 0.0 |
| 2021 Q4 | 25,620 | 4 | 0 | 156.1 |
| 2021 Q3 | 4,549 | 0 | 0 | 0.0 |
| 2021 Q2 | 6,022 | 3 | 0 | 498.2 |
| 2021 Q1 | 6,554 | 0 | 0 | 0.0 |
| 2020 Q4 | 7,777 | 5 | 0 | 642.9 |
| 2020 Q3 | 9,570 | 0 | 0 | 0.0 |
| 2020 Q2 | 11,141 | 2 | 1 | 179.5 |
| 2020 Q1 | 13,904 | 1 | 1 | 71.9 |
| 2019 Q4 | 21,724 | 0 | 0 | 0.0 |
| 2019 Q3 | 26,120 | 0 | 0 | 0.0 |
| 2019 Q2 | 34,329 | 1 | 0 | 29.1 |
| 2019 Q1 | 33,077 | 0 | 0 | 0.0 |
| 2018 Q4 | 24,282 | 2 | 0 | 82.4 |
| 2018 Q3 | 24,795 | 0 | 0 | 0.0 |
| 2018 Q2 | 27,644 | 2 | 1 | 72.3 |
| 2018 Q1 | 25,462 | 2 | 1 | 78.5 |
| 2017 Q4 | 42,218 | 0 | 0 | 0.0 |
| 2017 Q3 | 59,464 | 0 | 0 | 0.0 |
| 2017 Q2 | 50,614 | 4 | 3 | 79.0 |
| 2017 Q1 | 28,022 | 8 | 3 | 285.5 |
| 2016 Q4 | 19,661 | 0 | 0 | 0.0 |
| 2016 Q3 | 20,879 | 3 | 1 | 143.7 |
| 2016 Q2 | 23,051 | 0 | 0 | 0.0 |
| 2016 Q1 | 25,930 | 1 | 0 | 38.6 |
| 2015 Q4 | 35,001 | 0 | 0 | 0.0 |
| 2015 Q3 | 37,774 | 3 | 2 | 79.4 |
| 2015 Q2 | 33,149 | 0 | 0 | 0.0 |
| 2015 Q1 | 20,571 | 4 | 1 | 194.4 |
| 2014 Q4 | 24,623 | 0 | 0 | 0.0 |
| 2014 Q3 | 24,281 | 3 | 2 | 123.6 |
| 2014 Q2 | 19,657 | 0 | 0 | 0.0 |
| 2014 Q1 | 17,329 | 2 | 0 | 115.4 |
| 2013 Q4 | 15,136 | 0 | 0 | 0.0 |
| 2013 Q3 | 11,614 | 0 | 0 | 0.0 |
| 2013 Q2 | 13,520 | 0 | 0 | 0.0 |
| 2013 Q1 | 8,061 | 0 | 0 | 0.0 |
| 2012 Q4 | 12,885 | 1 | 1 | 77.6 |
| 2012 Q3 | 761 | 0 | 0 | 0.0 |
| 2012 Q2 | 521 | 0 | 0 | 0.0 |
| 2012 Q1 | 376 | 2 | 1 | 5319.1 |
| 2011 Q4 | 333 | 0 | 0 | 0.0 |
| 2011 Q3 | 460 | 0 | 0 | 0.0 |
| 2011 Q2 | 337 | 1 | 1 | 2967.4 |
| 2011 Q1 | 295 | 0 | 0 | 0.0 |
| 2010 Q4 | 181 | 0 | 0 | 0.0 |
| 2010 Q3 | 166 | 0 | 0 | 0.0 |
| 2010 Q2 | 243 | 4 | 0 | 16460.9 |
No reportable incidents on file.
MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.