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Cobra Stone Quarry 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.

Inspection activity

MSHA inspections since 2005

63

inspections on record

734

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: 734 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 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.

As of the most recent assessment on 2026-02-03.

Source: MSHA assessed-violations and conference/litigation data, updated weekly.

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
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
2024 Q2	30,022	2	1	66.6
2024 Q1	24,345	1	0	41.1

Show 75 earlier quarters Hide earlier quarters

Quarter	Hours worked	Citations	S&S	Per 1M hrs
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	10	2	213.6
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	9	2	210.7
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	5	1	1209.5
2011 Q2	4,190	0	0	0.0
2011 Q1	3,759	5	2	1330.1
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.

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The full compliance file on Cobra Stone Quarry

A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.

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