Clements Rock Plant has $18K in proposed MSHA penalties and $60 outstanding across 2 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
2
Years on record
1991–1992
Latest incident
Apr 1992
Compliance record
MSHA citations since 2000
116
citations
41
significant & substantial
$18,013
proposed penalties
$17,953
paid to date
100% of proposed penalties paid to date, a $60 gap.
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: 668 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Clements Rock Plant has $18K in proposed MSHA penalties and $60 outstanding across 2 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.
$18K
proposed penalties
$18K
current assessed
$18K
paid to date
$60
outstanding
116 assessments are final orders; 2 contested dockets.
Of $155 in penalties contested before the Commission, $155 was upheld in final decisions.
As of the most recent assessment on 2017-10-12.
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.
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.
1citations taken to the federal commission · 1% of citations on record
Stood as issued
1 · 100%
0%
Penalty reduction in decided contests
$100 proposed, $100 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2014-10-14.
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.
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: 2016-02-25, 10 years ago
13%
of limit-tested samples over the exposure limit
12
samples
8
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz61 over
Respirable dust, <.1mg4
Aluminum oxide fumes1
Arsenic fumes1
Show the individual readings (26)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2002-05-16
Quartz, respirable, >1% Qtz
0.44
0.43
1.02
Crusher Oper/Worker
2016-02-25
Respirable dust, <.1mg
0
Laborer, Bullgang
2009-03-31
Quartz, respirable, >1% Qtz
0.39
1.26
0.31
Truck Driver
2009-03-31
Quartz, respirable, >1% Qtz
0.25
1.57
0.16
Belt Cleaner
2005-08-31
Quartz, respirable, >1% Qtz
0.56
0.71
0.79
Dry Screen Plant Operator
2005-08-31
Aluminum oxide fumes
0
10
0.00
Welder, etc.
2005-08-31
Arsenic fumes
0
500
0.00
Welder, etc.
2005-08-31
Beryllium fumes
0
2
0.00
Welder, etc.
2005-08-31
Cadmium oxide fumes
0
100
0.00
Welder, etc.
2005-08-31
Chromium, insoluble
0
1
0.00
Welder, etc.
2005-08-31
Cobalt fumes
0
100
0.00
Welder, etc.
2005-08-31
Copper fumes
0
100
0.00
Welder, etc.
2005-08-31
Iron oxide fumes
0.02
10
0.00
Welder, etc.
2005-08-31
Lead fumes
0
150
0.00
Welder, etc.
2005-08-31
Magnesium oxide fumes
0
10
0.00
Welder, etc.
2005-08-31
Manganese fumes
0
5
0.00
Welder, etc.
2005-08-31
Molybdenum fumes
0
10
0.00
Welder, etc.
2005-08-31
Nickel fumes
0
1
0.00
Welder, etc.
2005-08-31
Titanium dioxide fumes
0
10
0.00
Welder, etc.
2005-08-31
Zinc oxide fumes
0
5
0.00
Welder, etc.
2005-08-31
Vanadium fumes
0
50
0.00
Welder, etc.
2005-08-31
Quartz, respirable, >1% Qtz
0.35
0.89
0.39
Truck Driver
2002-05-16
Respirable dust, <.1mg
0
Washer Operator
2002-05-16
Respirable dust, <.1mg
0
Truck Driver
2002-05-16
Respirable dust, <.1mg
0
Front-end Loader Operator
2002-05-16
Quartz, respirable, >1% Qtz
0.18
0.54
0.33
Washer 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.
Clements Rock Plant recorded 0.00 reportable injury cases per 100 full-time workers in 2007.
Injury rate, 2007
ⓘ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 3.30 and the all-US-mining average was 3.77 cases per 100 workers.
In California, metal and nonmetal mining averaged 3.87 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
2007 *
0.00
0.00
0.000
2006 *
0.00
0.00
0.000
2004 *
0.00
0.00
0.000
2003 *
0.00
0.00
0.000
2002 *
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2019
0
2018
16
2017
2
2016
2
2015
3
2014
1
2013
2
2012
6
2011
8
2010
10
2009
11
2008
13
2007
13
2006
15
2005
12
2004
13
2003
21
2002
21
2001
20
2000
22
Source: MSHA quarterly employment and production, updated weekly.
Clements Rock Plant sits in San Joaquin County, California, where the Census mining category is 0.1% 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.
San Joaquin County, California · Population 787,416
0.1%
Mining share of county employment
$88,531
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