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: 586 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Esparto Plant has $6K in proposed MSHA penalties and $0 outstanding across 6 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.
$6K
proposed penalties
$6K
current assessed
$6K
paid to date
$0
outstanding
61 assessments are final orders; 6 contested dockets.
Of $2K in penalties contested before the Commission, $1K was upheld in final decisions.
As of the most recent assessment on 2022-08-24.
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.
7citations taken to the federal commission · 11% of citations on record
Settled
6 · 86%
Vacated or withdrawn
1 · 14%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 1 decided S&S contests · industry: 79%
12%
Penalty reduction in decided contests
$807 proposed, $707 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2016-07-27.
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: 2013-09-18, 12 years ago
0%
of limit-tested samples over the exposure limit
7
samples
5
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz5
Respirable dust, <.1mg2
Show the individual readings (7)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2013-09-18
Quartz, respirable, >1% Qtz
0.34
0.54
0.63
Laborer, Bullgang
2013-09-18
Respirable dust, <.1mg
0
Scraper Operator
2013-09-18
Respirable dust, <.1mg
0
Crusher Oper/Worker
2000-12-18
Quartz, respirable, >1% Qtz
0.12
0.33
0.36
Oiler, Greaser
2000-12-18
Quartz, respirable, >1% Qtz
0.21
0.33
0.64
Laborer, Bullgang
2000-12-18
Quartz, respirable, >1% Qtz
0.13
0.69
0.19
Laborer, Bullgang
2000-12-18
Quartz, respirable, >1% Qtz
0.25
1.2
0.21
Scraper 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.
Esparto Plant recorded 0.00 reportable injury cases per 100 full-time workers in 2020.
Injury rate, 2020
ⓘ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 1.77 and the all-US-mining average was 2.08 cases per 100 workers.
In California, metal and nonmetal mining averaged 1.80 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
2020 *
0.00
0.00
0.000
2016 *
4.95
4.95
0.000
2015 *
0.00
0.00
0.000
2014 *
0.00
0.00
0.000
2013 *
0.00
0.00
0.000
2008 *
0.00
0.00
0.000
2007 *
0.00
0.00
0.000
2006 *
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
2026
5
2025
0
2024
3
2023
13
2022
16
2020
15
2019
11
2018
0
2017
5
2016
22
2015
16
2014
16
2013
12
2011
4
2010
2
2008
12
2007
12
2006
13
2005
11
2004
17
2003
16
2002
13
2001
12
2000
11
Source: MSHA quarterly employment and production, updated weekly.
Esparto Plant sits in Yolo 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.
Yolo County, California · Population 217,782
0.1%
Mining share of county employment
$88,818
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
1,523
0
0
0.0
2026 Q1
0
0
0
2025 Q4
0
0
0
2025 Q3
0
0
0
2025 Q2
0
0
0
2025 Q1
8
0
0
0.0
2024 Q4
98
0
0
0.0
2024 Q3
98
0
0
0.0
Show 78 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
0
0
0
2024 Q1
127
0
0
0.0
2023 Q4
64
0
0
0.0
2023 Q3
2,410
0
0
0.0
2023 Q2
5,274
0
0
0.0
2023 Q1
8,286
0
0
0.0
2022 Q4
7,649
0
0
0.0
2022 Q3
1,135
2
1
1762.1
2020 Q4
348
0
0
0.0
2020 Q3
4,899
0
0
0.0
2020 Q2
7,356
0
0
0.0
2020 Q1
8,064
0
0
0.0
2019 Q4
4,336
2
0
461.3
2019 Q3
5,153
0
0
0.0
2019 Q2
4,102
0
0
0.0
2019 Q1
0
0
0
2018 Q3
0
0
0
2018 Q2
0
0
0
2018 Q1
0
0
0
2017 Q4
0
0
0
2017 Q3
0
1
0
2017 Q2
280
0
0
0.0
2017 Q1
4,721
1
0
211.8
2016 Q4
9,180
0
0
0.0
2016 Q3
10,802
0
0
0.0
2016 Q2
10,533
4
0
379.8
2016 Q1
9,916
0
0
0.0
2015 Q4
7,914
0
0
0.0
2015 Q3
8,877
2
1
225.3
2015 Q2
9,560
0
0
0.0
2015 Q1
9,988
3
0
300.4
2014 Q4
8,597
0
0
0.0
2014 Q3
10,320
2
0
193.8
2014 Q2
13,790
0
0
0.0
2014 Q1
6,771
1
0
147.7
2013 Q4
7,347
0
0
0.0
2013 Q3
9,130
0
0
0.0
2013 Q2
8,652
6
1
693.5
2013 Q1
4,171
0
0
0.0
2011 Q3
356
0
0
0.0
2011 Q2
1,100
0
0
0.0
2010 Q1
137
0
0
0.0
2008 Q4
3,371
0
0
0.0
2008 Q3
8,250
0
0
0.0
2008 Q2
9,656
0
0
0.0
2008 Q1
7,639
1
0
130.9
2007 Q4
7,367
2
0
271.5
2007 Q3
8,977
0
0
0.0
2007 Q2
7,191
0
0
0.0
2007 Q1
6,180
0
0
0.0
2006 Q4
7,262
1
0
137.7
2006 Q3
8,384
0
0
0.0
2006 Q2
7,773
0
0
0.0
2006 Q1
6,125
0
0
0.0
2005 Q4
6,827
6
0
878.9
2005 Q3
7,125
0
0
0.0
2005 Q2
5,550
0
0
0.0
2005 Q1
5,927
0
0
0.0
2004 Q4
10,260
0
0
0.0
2004 Q3
10,092
2
0
198.2
2004 Q2
10,465
0
0
0.0
2004 Q1
8,619
1
0
116.0
2003 Q4
10,554
0
0
0.0
2003 Q3
11,877
2
1
168.4
2003 Q2
10,339
0
0
0.0
2003 Q1
10,180
0
0
0.0
2002 Q4
10,005
3
0
299.9
2002 Q3
10,345
0
0
0.0
2002 Q2
8,120
0
0
0.0
2002 Q1
6,281
1
1
159.2
2001 Q4
7,410
1
1
135.0
2001 Q3
7,903
0
0
0.0
2001 Q2
7,599
6
3
789.6
2001 Q1
7,067
0
0
0.0
2000 Q4
5,634
1
0
177.5
2000 Q3
7,992
0
0
0.0
2000 Q2
6,303
10
1
1586.5
2000 Q1
5,984
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
6 on file
2016 · 1 incident
July 16, 2016CA · Metal/Non-Metalcrane operator, mobile equipment operator (meo), dragline operator, dropball operator, riggerSLIP OR FALL OF PERSON
Employee jumped from an excavator to a haul truck. Fell approx. 7' sustaining head and back pain. Employee refused assistance and medical attention.
2003 · 1 incident
October 25, 2003CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON