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shamrock: 1 recorded fatality Metal/Non-Metal

L&M STONE LLC · Surface
Controlled by William Matthew Woodie
Shamrock, Wheeler County, TX  ·  Abandoned
MSHA Mine ID: 4104758

shamrock has $85K in proposed MSHA penalties and $302 outstanding across 7 contested dockets, plus health sampling and the full incident record.

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Fatalities
1
Total incidents
5
Years on record
2011–2015
Latest incident
Oct 2015
Compliance record
MSHA citations since 2009
70
citations
18
significant & substantial
$84,951
proposed penalties
$63,115
paid to date
74% of proposed penalties paid to date, a $21,836 gap.
Source: MSHA violations data, updated weekly.
See L&M STONE LLC's full MSHA compliance history →
Inspection activity
MSHA inspections since 2009
48
inspections on record
757
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: 757 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

shamrock has $85K in proposed MSHA penalties and $302 outstanding across 7 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.
$85K
proposed penalties
$63K
current assessed
$63K
paid to date
$302
outstanding
67 assessments are final orders; 7 contested dockets.
Of $69K in penalties contested before the Commission, $48K was upheld in final decisions.
As of the most recent assessment on 2026-04-22.
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.
26.5%
significant & substantial
11.8%
high negligence or reckless
26.5%
reasonably likely or greater
47.1%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 5.9% low, 82.4% moderate, 11.8% 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.
11 citations taken to the federal commission · 16% of citations on record
  • Settled 10 · 91%
  • Stood as issued 1 · 9%
38%
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 8 decided S&S contests · industry: 79%
31%
Penalty reduction in decided contests
$69K proposed, $48K 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 2015-08-02.
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 2014-0250 Settlement Rae 2014 $52K → $36K
CENT 2015-0370 Settlement Lesnick 2015 $10K → $7K
CENT 2014-0249 Settlement Rae 2014 $3K → $3K
CENT 2011-670M Settlement Paez 2012 $1K → $343
CENT 2012-32M Settlement Simonton 2012 $983 → $300
CENT 2013-536M Dismissal Lesnick 2014 $873 → $873
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: 2024-09-18
0%
of limit-tested samples over the exposure limit
13
samples
8
limit-tested
Most sampled contaminants
  • Nuisance dust, respirable, <1% Qtz7
  • Respirable dust, <.1mg4
  • Quartz, respirable, >1% Qtz2
Show the individual readings (13)
Date Contaminant Concentration Limit Conc / limit Occupation
2024-09-18 Respirable dust, <.1mg 0 Laborer, Bullgang
2024-09-18 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-01-19 Quartz, respirable, >1% Qtz 0.45 Cutting Mach Operator
2023-01-19 Nuisance dust, respirable, <1% Qtz 0.13 10 0.01 Front-end Loader Operator
2018-01-10 Nuisance dust, respirable, <1% Qtz 0.25 10 0.03 Cont. Miner Operator
2018-01-10 Quartz, respirable, >1% Qtz 0.71 2.57 0.28 Scraper Operator
2018-01-10 Respirable dust, <.1mg 0 Front-end Loader Operator
2017-03-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2011-01-20 Nuisance dust, respirable, <1% Qtz 0.38 10 0.04 Cutting Mach Operator
2011-01-20 Nuisance dust, respirable, <1% Qtz 0.18 10 0.02 Cutting Mach Operator
2009-02-11 Nuisance dust, respirable, <1% Qtz 1.25 10 0.13 Cutting Mach Operator
2009-02-11 Nuisance dust, respirable, <1% Qtz 0.18 10 0.02 Front-end Loader Operator
2009-02-11 Nuisance dust, respirable, <1% Qtz 0.5 10 0.05 Front-end Loader 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.

shamrock recorded 0.00 reportable injury cases per 100 full-time workers in 2021.

Injury rate, 2021
ⓘ 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
Below average. The US metal and nonmetal mining average was 1.87 and the all-US-mining average was 2.19 cases per 100 workers.
In Texas, metal and nonmetal mining averaged 1.57 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
2021 * 0.00 0.00 0.000
2020 * 0.00 0.00 0.000
2019 * 0.00 0.00 0.000
2015 * 6.38 0.00 0.000
2014 * 0.00 0.00 0.000
2013 * 5.27 5.27 5.268
2012 * 11.20 11.20 0.000
2011 * 5.14 5.14 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
  1. ACG Materials 2008 to 2018
  2. Arcosa Specialty Materials 2018 to 2026
  3. L&M STONE LLC 2026 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2025 4
2024 7
2023 5
2022 6
2021 8
2020 9
2019 12
2018 8
2017 8
2016 8
2015 15
2014 15
2013 14
2012 15
2011 21
2010 7
2009 3
2008 2
Source: MSHA quarterly employment and production, updated weekly.

shamrock sits in Wheeler County, Texas, where the Census mining category is 10.0% 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.
Wheeler County, Texas · Population 4,902
10.0%
Mining share of county employment
$67,964
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
2025 Q4 1,078 0 0 0.0
2025 Q3 2,895 0 0 0.0
2025 Q2 3,225 0 0 0.0
2025 Q1 2,394 1 0 417.7
2024 Q4 3,043 0 0 0.0
2024 Q3 4,111 1 1 243.2
2024 Q2 3,867 0 0 0.0
2024 Q1 2,807 0 0 0.0
Show 61 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 2,887 0 0 0.0
2023 Q3 2,738 2 0 730.5
2023 Q2 2,939 0 0 0.0
2023 Q1 2,901 3 1 1034.1
2022 Q4 2,555 0 0 0.0
2022 Q3 3,288 0 0 0.0
2022 Q2 2,919 0 0 0.0
2022 Q1 4,174 1 0 239.6
2021 Q4 5,875 0 0 0.0
2021 Q3 5,662 1 0 176.6
2021 Q2 5,401 0 0 0.0
2021 Q1 4,816 1 0 207.6
2020 Q4 4,027 0 0 0.0
2020 Q3 5,501 0 0 0.0
2020 Q2 5,495 0 0 0.0
2020 Q1 5,974 1 0 167.4
2019 Q4 6,780 0 0 0.0
2019 Q3 8,195 0 0 0.0
2019 Q2 6,754 0 0 0.0
2019 Q1 5,919 0 0 0.0
2018 Q4 4,398 2 1 454.8
2018 Q3 4,160 0 0 0.0
2018 Q2 5,727 1 0 174.6
2018 Q1 4,505 4 3 887.9
2017 Q4 3,263 0 0 0.0
2017 Q3 3,695 0 0 0.0
2017 Q2 5,236 0 0 0.0
2017 Q1 4,872 1 0 205.3
2016 Q4 4,789 0 0 0.0
2016 Q3 5,047 0 0 0.0
2016 Q2 5,164 1 0 193.6
2016 Q1 3,950 3 0 759.5
2015 Q4 6,188 0 0 0.0
2015 Q3 6,841 0 0 0.0
2015 Q2 5,968 3 0 502.7
2015 Q1 12,353 4 1 323.8
2014 Q4 12,993 0 0 0.0
2014 Q3 9,127 3 1 328.7
2014 Q2 9,988 0 0 0.0
2014 Q1 8,111 0 0 0.0
2013 Q4 10,327 0 0 0.0
2013 Q3 10,477 5 2 477.2
2013 Q2 9,992 5 1 500.4
2013 Q1 7,168 2 1 279.0
2012 Q4 8,351 0 0 0.0
2012 Q3 7,976 6 2 752.3
2012 Q2 10,760 1 1 92.9
2012 Q1 8,619 5 1 580.1
2011 Q4 9,420 0 0 0.0
2011 Q3 12,524 3 0 239.5
2011 Q2 10,041 0 0 0.0
2011 Q1 6,954 3 0 431.4
2010 Q4 3,901 0 0 0.0
2010 Q3 4,254 0 0 0.0
2010 Q2 2,717 1 1 368.1
2010 Q1 1,623 0 0 0.0
2009 Q4 1,220 0 0 0.0
2009 Q3 1,278 0 0 0.0
2009 Q2 1,564 0 0 0.0
2009 Q1 3,453 2 1 579.2
2008 Q4 370 0 0 0.0

Fatalities at this mine

1 recorded
April 27, 2013 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech Fatality · POWERED HAULAGE
ACG Materials · Caught in, under or between running or meshing objects

Employee was cleaning a jammed rock from a return roller on a track mounted CEC Crusher. The engine was still running and the belt was engaged. Employee "assumed" belt was turned off because the head pulley was not spinning skipping on the belt; the belt was actually stalled. He did not lock out/ and tag the crusher before performing the work to de-energize all power.

Reportable incidents

4 on file (excluding fatalities above)

2015 · 1 incident

October 17, 2015 TX · Metal/Non-Metal mine manager, mine foreman, mine owner HANDLING OF MATERIALS
ACG Materials · Caught in, under or between a moving and a stationary object

Employee was in the shop area storing bucket pins on a storage rack. A pin fell over pinning his Right index finger between the pin and shelve causing the laceration of the finger.

2012 · 2 incidents

March 28, 2012 TX · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
ACG Materials · Fall from machine

IEE was exiting the crusher/hopper. He fell 11.5 feet to the ground on his right side. Co-workers called 911 and 25 minutes later he was gernied by the EMTs then the helicopter showed up and was mediflighted to Amarillo hospital.

February 14, 2012 TX · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
ACG Materials · Struck by falling object

Working on K-Tec scraper, loosened off hydraulic hose, pan dropped to ground, caused metal cover to fall on left foot

2011 · 1 incident

October 27, 2011 TX · Metal/Non-Metal assistant mine foreman, assistant mine manager HANDLING OF MATERIALS
ACG Materials · Over-exertion in lifting objects

While replacing blades on scraper, lifted one and felt pain in lower back. Continued working until 11 days later when felt the injury again while in office.