Edmonston Rock Plant has $44K in proposed MSHA penalties and $151 outstanding across 9 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
13
Years on record
1986–2011
Latest incident
Jul 2011
Compliance record
MSHA citations since 2000
160
citations
30
significant & substantial
$43,614
proposed penalties
$31,956
paid to date
73% of proposed penalties paid to date, a $11,658 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.
160 citations across 1,103 inspection hours.
Source: MSHA inspections data, updated weekly.
Edmonston Rock Plant has $44K in proposed MSHA penalties and $151 outstanding across 9 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.
$44K
proposed penalties
$32K
current assessed
$32K
paid to date
$151
outstanding
159 assessments are final orders; 9 contested dockets.
Of $26K in penalties contested before the Commission, $15K was upheld in final decisions.
As of the most recent assessment on 2026-04-16.
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.
28citations taken to the federal commission · 18% of citations on record
Settled
26 · 93%
Vacated or withdrawn
1 · 4%
Still open
1 · 4%
50%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 14 decided S&S contests · industry: 79%
44%
Penalty reduction in decided contests
$26K proposed, $15K 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 2026-07-08.
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: 2023-07-20, 3 years ago
29%
of limit-tested samples over the exposure limit
15
samples
7
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz82 over
Respirable dust, <.1mg7
Show the individual readings (15)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2005-06-15
Quartz, respirable, >1% Qtz
1.17
0.95
1.23
Laborer, Bullgang
2005-06-15
Quartz, respirable, >1% Qtz
1.92
0.7
2.74
Laborer, Bullgang
2023-07-20
Quartz, respirable, >1% Qtz
0.12
Laborer, Bullgang
2021-02-17
Respirable dust, <.1mg
0
Front-end Loader Operator
2021-02-17
Respirable dust, <.1mg
0
Crusher Oper/Worker
2017-02-01
Respirable dust, <.1mg
0
Bulldozer Operator
2013-06-19
Quartz, respirable, >1% Qtz
0.26
0.87
0.30
Laborer, Bullgang
2013-06-19
Quartz, respirable, >1% Qtz
0.13
1.07
0.12
Front-end Loader Operator
2006-04-11
Respirable dust, <.1mg
0
Laborer, Bullgang
2006-04-11
Quartz, respirable, >1% Qtz
0.13
1.05
0.12
Mechanic
2005-12-14
Quartz, respirable, >1% Qtz
0.3
1.23
0.24
Dry Screen Plant Operator
2005-12-14
Quartz, respirable, >1% Qtz
0.24
1.44
0.17
Bulldozer Operator
2005-06-15
Respirable dust, <.1mg
0
Front-end Loader Operator
2005-06-15
Respirable dust, <.1mg
0
Crusher Oper/Worker
2001-06-21
Respirable dust, <.1mg
0
Mechanic
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.
Edmonston Rock Plant recorded 0.00 reportable injury cases per 100 full-time workers in 2025.
Injury rate, 2025
ⓘ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 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In California, metal and nonmetal mining averaged 1.43 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
2025 *
0.00
0.00
0.000
2023 *
0.00
0.00
0.000
2022 *
0.00
0.00
0.000
2021 *
0.00
0.00
0.000
2020 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2017 *
0.00
0.00
0.000
2013 *
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
13
2025
11
2024
9
2023
11
2022
15
2021
11
2020
15
2019
13
2018
11
2017
11
2016
10
2015
10
2014
15
2013
16
2012
19
2011
20
2010
14
2009
13
2008
13
2007
17
2006
18
2005
20
2004
14
2003
14
2002
16
2001
19
2000
11
Source: MSHA quarterly employment and production, updated weekly.
Edmonston Rock Plant sits in Kern County, California, where the Census mining category is 2.3% 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.
Kern County, California · Population 910,433
2.3%
Mining share of county employment
$67,660
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
6,927
1
0
144.4
2026 Q1
5,829
2
0
343.1
2025 Q4
5,107
0
0
0.0
2025 Q3
6,178
0
0
0.0
2025 Q2
6,021
2
1
332.2
2025 Q1
4,681
1
0
213.6
2024 Q4
4,767
0
0
0.0
2024 Q3
5,218
0
0
0.0
Show 98 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
4,657
1
0
214.7
2024 Q1
4,032
1
0
248.0
2023 Q4
5,135
0
0
0.0
2023 Q3
6,567
1
0
152.3
2023 Q2
5,907
0
0
0.0
2023 Q1
3,659
1
0
273.3
2022 Q4
6,204
0
0
0.0
2022 Q3
8,690
0
0
0.0
2022 Q2
7,828
1
0
127.7
2022 Q1
6,751
3
0
444.4
2021 Q4
5,371
0
0
0.0
2021 Q3
2,299
0
0
0.0
2021 Q2
8,201
1
0
121.9
2021 Q1
7,183
1
0
139.2
2020 Q4
8,302
0
0
0.0
2020 Q3
5,805
0
0
0.0
2020 Q2
8,472
0
0
0.0
2020 Q1
6,504
2
0
307.5
2019 Q4
6,774
0
0
0.0
2019 Q3
6,385
0
0
0.0
2019 Q2
5,508
10
3
1815.5
2019 Q1
4,504
1
0
222.0
2018 Q4
4,512
5
1
1108.2
2018 Q3
5,182
0
0
0.0
2018 Q2
4,423
2
0
452.2
2018 Q1
4,525
0
0
0.0
2017 Q4
5,106
3
1
587.5
2017 Q3
5,413
0
0
0.0
2017 Q2
6,866
5
1
728.2
2017 Q1
5,038
2
0
397.0
2016 Q4
5,114
0
0
0.0
2016 Q3
5,148
0
0
0.0
2016 Q2
4,669
0
0
0.0
2016 Q1
5,060
2
0
395.3
2015 Q4
3,611
0
0
0.0
2015 Q3
6,415
0
0
0.0
2015 Q2
4,463
4
0
896.3
2015 Q1
5,171
0
0
0.0
2014 Q4
4,127
4
1
969.2
2014 Q3
3,605
0
0
0.0
2014 Q2
4,816
3
3
622.9
2014 Q1
5,206
0
0
0.0
2013 Q4
6,514
3
2
460.5
2013 Q3
7,558
0
0
0.0
2013 Q2
6,558
4
1
609.9
2013 Q1
5,170
0
0
0.0
2012 Q4
7,012
2
1
285.2
2012 Q3
10,508
0
0
0.0
2012 Q2
6,182
2
0
323.5
2012 Q1
4,119
0
0
0.0
2011 Q4
6,466
2
2
309.3
2011 Q3
9,294
3
0
322.8
2011 Q2
6,024
0
0
0.0
2011 Q1
4,336
0
0
0.0
2010 Q4
4,854
4
0
824.1
2010 Q3
3,825
0
0
0.0
2010 Q2
5,482
0
0
0.0
2010 Q1
3,713
0
0
0.0
2009 Q4
4,719
0
0
0.0
2009 Q3
5,281
4
2
757.4
2009 Q2
6,310
0
0
0.0
2009 Q1
3,869
0
0
0.0
2008 Q4
3,942
0
0
0.0
2008 Q3
4,936
0
0
0.0
2008 Q2
5,626
1
0
177.7
2008 Q1
4,353
0
0
0.0
2007 Q4
5,271
0
0
0.0
2007 Q3
5,460
0
0
0.0
2007 Q2
5,751
3
1
521.6
2007 Q1
4,580
0
0
0.0
2006 Q4
5,252
1
0
190.4
2006 Q3
5,636
0
0
0.0
2006 Q2
5,548
0
0
0.0
2006 Q1
5,798
0
0
0.0
2005 Q4
6,347
2
1
315.1
2005 Q3
9,084
0
0
0.0
2005 Q2
4,129
6
2
1453.1
2005 Q1
3,224
0
0
0.0
2004 Q4
3,798
6
0
1579.8
2004 Q3
4,193
0
0
0.0
2004 Q2
3,491
1
0
286.5
2004 Q1
3,408
0
0
0.0
2003 Q4
3,803
1
0
263.0
2003 Q3
6,491
9
0
1386.5
2003 Q2
3,896
0
0
0.0
2003 Q1
3,895
6
0
1540.4
2002 Q4
4,699
0
0
0.0
2002 Q3
4,802
0
0
0.0
2002 Q2
4,965
7
0
1409.9
2002 Q1
5,974
4
0
669.6
2001 Q4
5,265
0
0
0.0
2001 Q3
7,549
0
0
0.0
2001 Q2
7,391
9
0
1217.7
2001 Q1
4,468
0
0
0.0
2000 Q4
3,715
0
0
0.0
2000 Q3
4,753
21
7
4418.3
2000 Q2
3,694
0
0
0.0
2000 Q1
3,125
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
13 on file
2011 · 1 incident
July 20, 2011CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
AFTER SPACE WAS CUT THE MECHANIC WAS GRINDING THE SLAG OFF WHEN A METAL SLIVER BOUNCED UNDER HIS SAFETY GLASSES AND LODGED IN HIS EYE. SAFETY GLASSES WERE PROVIDED AND WORN.
EE WAS CLEANING AROUND TRANSFER AREA, WHEN HE PICKED UP A LARGE ROCK ANOTHER LARGE ROCK ABOUT 8" IN DIAMATOR FELL AND CAUGHT HIS FINGER BETWEEN BOTH ROCKS.
1988 · 1 incident
September 12, 1988CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanPOWERED HAULAGE