Mining Incidents

LONG DECOMPOSED GRANITE PIT: 20 MSHA citations Metal/Non-Metal

Mark Long Tractor Work · Surface
Controlled by Mark Long
MARIPOSA, Mariposa County, CA  ·  Intermittent
MSHA Mine ID: 0405398

LONG DECOMPOSED GRANITE PIT has $3K in proposed MSHA penalties and $0 outstanding across 0 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 2004
20
citations
6
significant & substantial
$3,011
proposed penalties
$3,011
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
35
inspections on record
208
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: 208 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

LONG DECOMPOSED GRANITE PIT has $3K 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.
$3K
proposed penalties
$3K
current assessed
$3K
paid to date
$0
outstanding
19 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2024-10-29.
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.
31.6%
significant & substantial
5.3%
high negligence or reckless
31.6%
reasonably likely or greater
63.2%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 15.8% low, 78.9% moderate, 5.3% high, 0.0% reckless.
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: 2009-06-04, 17 years ago
1
samples
0
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg1
Show the individual readings (1)
Date Contaminant Concentration Limit Conc / limit Occupation
2009-06-04 Respirable dust, <.1mg 0 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.
Ownership history
  1. Mark Long Tractor Work 1999 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 1
2024 1
2023 1
2022 1
2021 1
2020 1
2019 1
2018 1
2017 1
2016 1
2015 1
2014 1
2013 2
2012 3
2011 2
2010 3
2009 2
2008 3
2007 2
2006 2
2005 2
2004 2
2003 1
2002 1
2001 1
2000 1
Source: MSHA quarterly employment and production, updated weekly.

LONG DECOMPOSED GRANITE PIT sits in Mariposa County, California, where the Census mining category is 0.0% 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.
Mariposa County, California · Population 17,060
0.0%
Mining share of county employment
$65,378
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 Q1 10 0 0 0.0
2024 Q3 10 8 0 800000.0
2024 Q1 10 0 0 0.0
2023 Q4 8 0 0 0.0
2023 Q3 9 0 0 0.0
2023 Q2 8 0 0 0.0
2023 Q1 8 0 0 0.0
2022 Q4 8 0 0 0.0
Show 87 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2022 Q3 16 0 0 0.0
2022 Q2 8 0 0 0.0
2022 Q1 10 0 0 0.0
2021 Q4 10 0 0 0.0
2021 Q3 10 0 0 0.0
2021 Q2 8 0 0 0.0
2021 Q1 8 0 0 0.0
2020 Q4 8 0 0 0.0
2020 Q3 8 0 0 0.0
2020 Q2 8 0 0 0.0
2020 Q1 8 0 0 0.0
2019 Q3 8 0 0 0.0
2019 Q2 8 0 0 0.0
2019 Q1 10 0 0 0.0
2018 Q4 10 0 0 0.0
2018 Q3 10 0 0 0.0
2018 Q2 10 0 0 0.0
2018 Q1 10 0 0 0.0
2017 Q4 10 0 0 0.0
2017 Q3 10 0 0 0.0
2017 Q2 10 0 0 0.0
2017 Q1 5 0 0 0.0
2016 Q4 5 0 0 0.0
2016 Q3 10 0 0 0.0
2016 Q2 10 0 0 0.0
2016 Q1 20 0 0 0.0
2015 Q4 15 0 0 0.0
2015 Q3 15 0 0 0.0
2015 Q2 20 0 0 0.0
2015 Q1 10 0 0 0.0
2014 Q4 0 0 0
2014 Q3 20 0 0 0.0
2014 Q2 10 0 0 0.0
2014 Q1 120 0 0 0.0
2013 Q4 136 0 0 0.0
2013 Q3 50 0 0 0.0
2013 Q2 20 0 0 0.0
2013 Q1 188 0 0 0.0
2012 Q4 127 0 0 0.0
2012 Q3 589 0 0 0.0
2012 Q2 148 0 0 0.0
2012 Q1 40 0 0 0.0
2011 Q4 40 1 0 25000.0
2011 Q3 174 0 0 0.0
2011 Q2 352 2 1 5681.8
2011 Q1 378 0 0 0.0
2010 Q4 88 0 0 0.0
2010 Q3 194 0 0 0.0
2010 Q2 306 0 0 0.0
2010 Q1 10 0 0 0.0
2009 Q4 141 0 0 0.0
2009 Q3 126 0 0 0.0
2009 Q2 281 2 1 7117.4
2009 Q1 0 0 0
2008 Q4 150 0 0 0.0
2008 Q3 105 0 0 0.0
2008 Q2 249 1 1 4016.1
2008 Q1 388 0 0 0.0
2007 Q4 408 0 0 0.0
2007 Q3 598 0 0 0.0
2007 Q2 176 0 0 0.0
2007 Q1 48 0 0 0.0
2006 Q4 103 0 0 0.0
2006 Q3 288 0 0 0.0
2006 Q2 299 0 0 0.0
2006 Q1 46 0 0 0.0
2005 Q4 60 0 0 0.0
2005 Q3 90 0 0 0.0
2005 Q2 175 0 0 0.0
2005 Q1 150 2 1 13333.3
2004 Q4 180 0 0 0.0
2004 Q3 100 1 0 10000.0
2004 Q2 78 0 0 0.0
2004 Q1 66 0 0 0.0
2003 Q4 70 0 0 0.0
2003 Q3 50 0 0 0.0
2003 Q2 35 0 0 0.0
2003 Q1 25 0 0 0.0
2002 Q1 45 0 0 0.0
2001 Q4 40 0 0 0.0
2001 Q3 40 0 0 0.0
2001 Q2 114 0 0 0.0
2001 Q1 54 0 0 0.0
2000 Q4 8 0 0 0.0
2000 Q3 20 0 0 0.0
2000 Q2 155 0 0 0.0
2000 Q1 50 0 0 0.0

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.