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Cobra Stone Quarry: 164 MSHA citations Metal/Non-Metal

Cobra Stone Inc · Surface
Controlled by Pedro E Aguado
Georgetown, Williamson County, TX  ·  Active
MSHA Mine ID: 4104533

Cobra Stone Quarry has $112K in proposed MSHA penalties and $0 outstanding across 3 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
1
Years on record
2013
Latest incident
Feb 2013
Compliance record
MSHA citations since 2006
164
citations
53
significant & substantial
$112,031
proposed penalties
$99,846
paid to date
89% of proposed penalties paid to date, a $12,185 gap.
Source: MSHA violations data, updated weekly.
See Cobra Stone Inc's full MSHA compliance history →
Inspection activity
MSHA inspections since 2005
64
inspections on record
743
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: 743 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘ A Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
3
Section 107(a) orders
Most recent order: 2018-04-09.
On record since 2014.
Source: MSHA imminent-danger order records, updated weekly.

Cobra Stone Quarry has $112K in proposed MSHA penalties and $0 outstanding across 3 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.
$112K
proposed penalties
$100K
current assessed
$100K
paid to date
$0
outstanding
159 assessments are final orders; 3 contested dockets.
Of $31K in penalties contested before the Commission, $19K was upheld in final decisions.
As of the most recent assessment on 2026-02-03.
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.
33.3%
significant & substantial
12.6%
high negligence or reckless
33.3%
reasonably likely or greater
33.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 11.3% low, 76.1% moderate, 12.6% 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.
6 citations taken to the federal commission · 4% of citations on record
  • Settled 6 · 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 5 decided S&S contests · industry: 79%
39%
Penalty reduction in decided contests
$31K proposed, $19K 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 2018-07-17.
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 2018-0385 Settlement Miller 2018 $24K → $11K
CENT 2014-0548 Settlement Manning 2014 $6K → $6K
CENT 2017-0045 Settlement Lesnick 2017 $1K → $1K
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: 2017-08-30, 8 years ago
0%
of limit-tested samples over the exposure limit
10
samples
1
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg6
  • Unlisted Particulate, respirable, <1% Qtz3
  • Quartz, respirable, >1% Qtz1
Show the individual readings (10)
Date Contaminant Concentration Limit Conc / limit Occupation
2017-08-30 Respirable dust, <.1mg 0 Stone Polisher/Cutter
2017-08-30 Unlisted Particulate, respirable, <1% Qtz 0.15 Stone Polisher/Cutter
2017-08-30 Quartz, respirable, >1% Qtz 1.06 1.76 0.60 Forklift Operator
2017-08-30 Respirable dust, <.1mg 0 Mechanic
2011-01-20 Unlisted Particulate, respirable, <1% Qtz 0.2 Utility Man
2011-01-20 Unlisted Particulate, respirable, <1% Qtz 0.12 Utility Man
2011-01-20 Respirable dust, <.1mg 0 Utility Man
2005-07-20 Respirable dust, <.1mg 0 Utility Man
2005-07-20 Respirable dust, <.1mg 0 Front-end Loader Operator
2005-07-20 Respirable dust, <.1mg 0 Stone Polisher/Cutter
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 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
2022 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
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
  1. Cobra Stone 2005 to 2006
  2. Cobra Stone Inc 2006 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 50
2025 82
2024 59
2023 47
2022 68
2021 37
2020 46
2019 84
2018 101
2017 70
2016 86
2015 63
2014 71
2013 67
2012 54
2011 50
2010 35
2009 31
2008 44
2007 45
2006 26
2005 11
Source: MSHA quarterly employment and production, updated weekly.

Cobra Stone Quarry sits in Williamson County, Texas, where the Census mining category is 0.3% 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.
Williamson County, Texas · Population 643,889
0.3%
Mining share of county employment
$108,309
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 43,648 0 0 0.0
2026 Q1 31,960 2 1 62.6
2025 Q4 60,704 0 0 0.0
2025 Q3 68,491 0 0 0.0
2025 Q2 72,711 2 0 27.5
2025 Q1 37,210 0 0 0.0
2024 Q4 58,943 4 1 67.9
2024 Q3 57,134 0 0 0.0
Show 77 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 30,022 2 1 66.6
2024 Q1 24,345 1 0 41.1
2023 Q4 21,358 0 0 0.0
2023 Q3 39,903 3 0 75.2
2023 Q2 34,987 1 0 28.6
2023 Q1 38,486 0 0 0.0
2022 Q4 67,617 0 0 0.0
2022 Q3 52,722 7 1 132.8
2022 Q2 33,426 5 3 149.6
2022 Q1 35,828 0 0 0.0
2021 Q4 32,304 0 0 0.0
2021 Q3 25,472 2 1 78.5
2021 Q2 26,684 0 0 0.0
2021 Q1 27,264 2 1 73.4
2020 Q4 29,009 0 0 0.0
2020 Q3 30,327 1 0 33.0
2020 Q2 34,786 0 0 0.0
2020 Q1 46,874 0 0 0.0
2019 Q4 57,107 3 2 52.5
2019 Q3 61,442 4 1 65.1
2019 Q2 73,743 0 0 0.0
2019 Q1 73,629 0 0 0.0
2018 Q4 77,219 5 2 64.8
2018 Q3 89,627 0 0 0.0
2018 Q2 69,536 10 4 143.8
2018 Q1 69,231 17 4 245.6
2017 Q4 54,987 1 1 18.2
2017 Q3 46,816 8 2 170.9
2017 Q2 47,181 0 0 0.0
2017 Q1 54,809 4 0 73.0
2016 Q4 68,239 0 0 0.0
2016 Q3 64,774 4 3 61.8
2016 Q2 64,442 0 0 0.0
2016 Q1 56,094 0 0 0.0
2015 Q4 42,713 7 1 163.9
2015 Q3 48,620 3 1 61.7
2015 Q2 49,749 0 0 0.0
2015 Q1 56,368 0 0 0.0
2014 Q4 54,471 5 2 91.8
2014 Q3 47,158 0 0 0.0
2014 Q2 62,843 11 8 175.0
2014 Q1 57,259 1 0 17.5
2013 Q4 55,383 0 0 0.0
2013 Q3 55,481 0 0 0.0
2013 Q2 51,566 2 1 38.8
2013 Q1 49,355 0 0 0.0
2012 Q4 45,871 2 1 43.6
2012 Q3 5,057 0 0 0.0
2012 Q2 3,403 3 0 881.6
2012 Q1 2,042 0 0 0.0
2011 Q4 3,942 4 0 1014.7
2011 Q3 4,134 4 1 967.6
2011 Q2 4,190 0 0 0.0
2011 Q1 3,759 3 2 798.1
2010 Q4 3,776 0 0 0.0
2010 Q3 3,509 0 0 0.0
2010 Q2 3,095 2 0 646.2
2010 Q1 3,140 1 0 318.5
2009 Q4 2,824 5 3 1770.5
2009 Q3 11,718 0 0 0.0
2009 Q2 26,352 0 0 0.0
2009 Q1 17,251 2 0 115.9
2008 Q4 21,513 1 0 46.5
2008 Q3 23,906 1 0 41.8
2008 Q2 29,998 1 0 33.3
2008 Q1 39,571 6 4 151.6
2007 Q4 39,977 0 0 0.0
2007 Q3 17,875 3 0 167.8
2007 Q2 17,106 0 0 0.0
2007 Q1 9,698 0 0 0.0
2006 Q4 10,883 2 0 183.8
2006 Q3 12,799 0 0 0.0
2006 Q2 10,530 0 0 0.0
2006 Q1 7,173 0 0 0.0
2005 Q4 4,919 0 0 0.0
2005 Q3 4,503 0 0 0.0
2005 Q2 3,630 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

1 on file

2013 · 1 incident

February 13, 2013 TX · Metal/Non-Metal ledgeman/hand, quarry man POWERED HAULAGE
Cobra Stone Inc · Struck by powered moving object

Poultry wire became entangled in driveshaft of a forklift. Operator shut down machine & went to the shop 100ft away to have a mechanic remove wire. A miner saw the wire & tried to remove it. The machine was not tagged; another forklift operator started the machine & proceeded forward when he felt he hit something. Operator saw miner under machine & called for help.