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: 816 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Cool Cave Quarry has $4K in proposed MSHA penalties and $0 outstanding across 1 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.
$4K
proposed penalties
$4K
current assessed
$4K
paid to date
$0
outstanding
30 assessments are final orders; 1 contested dockets.
Of $425 in penalties contested before the Commission, $425 was upheld in final decisions.
As of the most recent assessment on 2024-02-08.
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 · 3% of citations on record
Stood as issued
1 · 100%
0%
Penalty reduction in decided contests
$425 proposed, $425 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2016-07-13.
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: 2025-10-08
0%
of limit-tested samples over the exposure limit
15
samples
7
limit-tested
Most sampled contaminants
Respirable dust, <.1mg7
Quartz, respirable, >1% Qtz6
Nuisance dust, respirable, <1% Qtz1
Nuisance dust, total, <1% Qtz1
Show the individual readings (15)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-10-08
Quartz, respirable, >1% Qtz
0.14
Utility Man
2025-10-08
Respirable dust, <.1mg
0
Front-end Loader Operator
2025-04-30
Quartz, respirable, >1% Qtz
0.32
1.04
0.31
Mechanic
2016-11-30
Respirable dust, <.1mg
0
Backhoe Operator
2016-11-30
Respirable dust, <.1mg
0
Truck Driver
2014-02-04
Respirable dust, <.1mg
0
Front-end Loader Operator
2009-06-24
Respirable dust, <.1mg
0
Utility Man
2009-06-24
Quartz, respirable, >1% Qtz
0.19
1.32
0.14
Laborer, Bullgang
2009-06-24
Quartz, respirable, >1% Qtz
0.31
1.79
0.17
Mechanic
2005-06-08
Respirable dust, <.1mg
0
Truck Driver
2005-06-08
Nuisance dust, respirable, <1% Qtz
0.12
10
0.01
Crusher Oper/Worker
2005-06-08
Quartz, respirable, >1% Qtz
0.23
1.14
0.20
Laborer, Bullgang
2005-06-08
Respirable dust, <.1mg
0
Utility Man
2005-06-08
Quartz, respirable, >1% Qtz
0.19
1.4
0.14
Crusher Oper/Worker
2002-04-17
Nuisance dust, total, <1% Qtz
5.56
10
0.56
Drill Operator, Rotary
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.
Cool Cave Quarry 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
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 1.42 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
2018 *
9.52
0.00
0.000
2009 *
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
2005 *
0.00
0.00
0.000
2004 *
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
12
2024
11
2023
11
2022
10
2021
11
2020
9
2019
10
2018
10
2017
11
2016
7
2015
7
2014
8
2013
10
2012
10
2011
10
2010
11
2009
15
2008
17
2007
16
2006
15
2005
15
2004
15
2003
17
2002
16
2001
17
Source: MSHA quarterly employment and production, updated weekly.
Cool Cave Quarry sits in El Dorado 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.
El Dorado County, California · Population 192,299
0.1%
Mining share of county employment
$106,190
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
5,510
0
0
0.0
2026 Q1
4,997
0
0
0.0
2025 Q4
5,627
0
0
0.0
2025 Q3
5,108
0
0
0.0
2025 Q2
4,959
0
0
0.0
2025 Q1
4,974
0
0
0.0
2024 Q4
4,850
0
0
0.0
2024 Q3
4,817
0
0
0.0
Show 91 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
4,964
0
0
0.0
2024 Q1
4,436
1
1
225.4
2023 Q4
4,638
0
0
0.0
2023 Q3
4,816
0
0
0.0
2023 Q2
5,308
1
0
188.4
2023 Q1
5,018
0
0
0.0
2022 Q4
4,338
0
0
0.0
2022 Q3
4,714
0
0
0.0
2022 Q2
4,375
0
0
0.0
2022 Q1
4,623
0
0
0.0
2021 Q4
4,623
0
0
0.0
2021 Q3
4,571
0
0
0.0
2021 Q2
4,436
1
0
225.4
2021 Q1
4,355
0
0
0.0
2020 Q4
3,609
0
0
0.0
2020 Q3
3,756
0
0
0.0
2020 Q2
3,849
0
0
0.0
2020 Q1
4,091
0
0
0.0
2019 Q4
3,836
1
0
260.7
2019 Q3
3,990
0
0
0.0
2019 Q2
4,100
1
0
243.9
2019 Q1
4,136
0
0
0.0
2018 Q4
4,573
1
1
218.7
2018 Q3
5,219
0
0
0.0
2018 Q2
5,703
1
0
175.3
2018 Q1
5,510
0
0
0.0
2017 Q4
4,616
0
0
0.0
2017 Q3
4,988
0
0
0.0
2017 Q2
5,592
1
0
178.8
2017 Q1
4,184
0
0
0.0
2016 Q4
3,884
1
0
257.5
2016 Q3
3,841
0
0
0.0
2016 Q2
4,266
1
0
234.4
2016 Q1
1,613
0
0
0.0
2015 Q4
2,770
0
0
0.0
2015 Q3
3,824
0
0
0.0
2015 Q2
3,956
0
0
0.0
2015 Q1
1,310
0
0
0.0
2014 Q4
2,209
0
0
0.0
2014 Q3
4,083
0
0
0.0
2014 Q2
4,038
1
0
247.6
2014 Q1
1,423
0
0
0.0
2013 Q4
2,292
0
0
0.0
2013 Q3
4,060
0
0
0.0
2013 Q2
4,619
0
0
0.0
2013 Q1
4,573
1
0
218.7
2012 Q4
3,369
0
0
0.0
2012 Q3
5,355
1
0
186.7
2012 Q2
4,483
0
0
0.0
2012 Q1
1,943
0
0
0.0
2011 Q4
2,982
0
0
0.0
2011 Q3
3,994
0
0
0.0
2011 Q2
5,131
0
0
0.0
2011 Q1
3,947
0
0
0.0
2010 Q4
3,972
0
0
0.0
2010 Q3
4,809
3
0
623.8
2010 Q2
7,974
0
0
0.0
2010 Q1
2,388
0
0
0.0
2009 Q4
2,875
0
0
0.0
2009 Q3
6,452
0
0
0.0
2009 Q2
9,849
2
0
203.1
2009 Q1
3,427
1
0
291.8
2008 Q4
6,620
0
0
0.0
2008 Q3
8,578
0
0
0.0
2008 Q2
10,320
0
0
0.0
2008 Q1
7,740
1
0
129.2
2007 Q4
7,900
0
0
0.0
2007 Q3
8,852
0
0
0.0
2007 Q2
8,929
0
0
0.0
2007 Q1
8,659
0
0
0.0
2006 Q4
8,641
0
0
0.0
2006 Q3
8,438
0
0
0.0
2006 Q2
8,951
0
0
0.0
2006 Q1
8,381
1
0
119.3
2005 Q4
8,091
0
0
0.0
2005 Q3
8,144
0
0
0.0
2005 Q2
8,408
1
0
118.9
2005 Q1
7,784
0
0
0.0
2004 Q4
7,581
3
0
395.7
2004 Q3
7,672
0
0
0.0
2004 Q2
7,846
0
0
0.0
2004 Q1
6,535
0
0
0.0
2003 Q4
9,998
0
0
0.0
2003 Q3
9,321
0
0
0.0
2003 Q2
9,661
1
0
103.5
2003 Q1
6,559
0
0
0.0
2002 Q4
7,698
3
0
389.7
2002 Q3
8,190
0
0
0.0
2002 Q2
8,847
0
0
0.0
2002 Q1
9,285
0
0
0.0
2001 Q4
7,986
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
5 on file
2018 · 1 incident
November 9, 2018CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerPOWERED HAULAGE
While a 385 Excavator was loading a 745 CAT Haul truck, a rock est. 500-1000 pounds rolled over the truck bed. The passenger side hand rail, a stair tread, and a hose bracket were bent. No damage to the operator cab. Employee refused post accident drug and alcohol screen, left the site without notice prior to end of shift, and later resigned via text msg.
2014 · 1 incident
February 21, 2014CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
Teichert Aggregates · Caught in, under or between a moving and a stationary object
While lifting the forklift blade to adjust the horizontal location, the employee got her right pinky finger smashed between the blade and the carriage. This resulted in a hairline fracture and sutures to close the wound.
EE was pulling on an 1 1/8" wrench & he strained his right shoulder. ** This did not become reportable until 10/12/2012 when information was received about physical therapy **
2010 · 1 incident
April 5, 2010CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
While stepping off the back of the excavator, the operator slipped on a rock causing him to fall onto sharp broken rocks. As a result the operator cut his left hand beginning at the wrist.
2003 · 1 incident
May 13, 2003CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerPOWERED HAULAGE
EE was operating the 980 loader and as he was shifting gears, he felt a strain in his left hand. This was reported to his immediate supervisor, on the 14th of May at 3:15 PM, at shift end.