Littlerock Quarry has $126K in proposed MSHA penalties and $0 outstanding across 11 contested dockets, plus health sampling and the full incident record.
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Fatalities
1
Total incidents
37
Years on record
1987–2024
Latest incident
Jun 2024
Compliance record
MSHA citations since 2001
267
citations
94
significant & substantial
$125,927
proposed penalties
$112,934
paid to date
90% of proposed penalties paid to date, a $12,993 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.
267 citations across 2,223 inspection hours.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘA Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
1
Section 107(a) orders
Most recent order: 2023-08-02.
On record since 2023.
Source: MSHA imminent-danger order records, updated weekly.
Littlerock Quarry has $126K in proposed MSHA penalties and $0 outstanding across 11 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.
$126K
proposed penalties
$113K
current assessed
$113K
paid to date
$0
outstanding
262 assessments are final orders; 11 contested dockets.
Of $61K in penalties contested before the Commission, $44K was upheld in final decisions.
As of the most recent assessment on 2026-06-17.
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.
25citations taken to the federal commission · 9% of citations on record
Settled
18 · 72%
Stood as issued
6 · 24%
Vacated or withdrawn
1 · 4%
84%
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 25 decided S&S contests · industry: 79%
29%
Penalty reduction in decided contests
$59K proposed, $42K 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 2018-06-11.
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: 2026-04-29
5%
of limit-tested samples over the exposure limit
25
samples
21
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz211 over
Unlisted Particulate, respirable, <1% Qtz2
Noise dosimeter, 90dBA threshold dose1
Respirable dust, <.1mg1
Show the individual readings (25)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2001-03-27
Quartz, respirable, >1% Qtz
2.89
2.53
1.14
Bulldozer Operator
2026-04-29
Quartz, respirable, >1% Qtz
0.59
1.18
0.50
Laborer, Bullgang
2023-08-03
Quartz, respirable, >1% Qtz
0.21
0.89
0.24
Laborer, Bullgang
2023-08-03
Quartz, respirable, >1% Qtz
0.43
1.1
0.39
Utility Man
2022-05-10
Quartz, respirable, >1% Qtz
0.23
Laborer, Bullgang
2020-12-17
Quartz, respirable, >1% Qtz
0.55
0.75
0.73
Cleanup Man
2016-12-15
Quartz, respirable, >1% Qtz
0.31
1.33
0.23
Front-end Loader Operator
2016-12-15
Noise dosimeter, 90dBA threshold dose
37.1
100
0.37
Laborer, Bullgang
2016-12-15
Quartz, respirable, >1% Qtz
0.21
1.82
0.12
Laborer, Bullgang
2013-06-20
Quartz, respirable, >1% Qtz
0.36
1.65
0.22
Truck Driver
2013-06-20
Quartz, respirable, >1% Qtz
0.25
1.38
0.18
Laborer, Bullgang
2013-06-20
Quartz, respirable, >1% Qtz
0.3
2.48
0.12
Laborer, Bullgang
2009-10-27
Quartz, respirable, >1% Qtz
0.38
1.4
0.27
Truck Driver
2009-10-27
Quartz, respirable, >1% Qtz
0.21
1.19
0.18
Front-end Loader Operator
2009-10-27
Quartz, respirable, >1% Qtz
0.36
1.41
0.26
Laborer, Bullgang
2009-10-27
Quartz, respirable, >1% Qtz
0.51
1.95
0.26
Bulldozer Operator
2005-10-13
Quartz, respirable, >1% Qtz
1.24
1.44
0.86
Cleanup Man
2005-10-13
Quartz, respirable, >1% Qtz
1.08
1.89
0.57
Cleanup Man
2005-10-13
Quartz, respirable, >1% Qtz
0.66
1.65
0.40
Dry Screen Plant Operator
2004-01-28
Unlisted Particulate, respirable, <1% Qtz
0.12
Crusher Oper/Worker
2004-01-28
Unlisted Particulate, respirable, <1% Qtz
0.18
Front-end Loader Operator
2002-12-03
Quartz, respirable, >1% Qtz
0.36
0.87
0.41
Laborer, Bullgang
2002-12-03
Respirable dust, <.1mg
0
Front-end Loader Operator
2001-03-27
Quartz, respirable, >1% Qtz
1.32
3.31
0.40
Front-end Loader Operator
2001-03-27
Quartz, respirable, >1% Qtz
0.44
2.53
0.17
Front-end Loader 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.
Littlerock 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
2024 *
3.39
3.39
3.388
2023 *
3.46
3.46
0.000
2022 *
0.00
0.00
0.000
2021 *
4.90
0.00
0.000
2020 *
3.20
3.20
0.000
2019 *
0.00
0.00
0.000
2018 *
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
25
2025
27
2024
24
2023
25
2022
24
2021
22
2020
23
2019
26
2018
26
2017
19
2016
19
2015
19
2014
20
2013
20
2012
18
2011
17
2010
16
2009
14
2008
19
2007
21
2006
21
2005
19
2004
14
2003
16
2002
18
2001
15
2000
12
Source: MSHA quarterly employment and production, updated weekly.
Littlerock Quarry sits in Los Angeles 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.
Los Angeles County, California · Population 9,848,406
0.0%
Mining share of county employment
$87,760
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
14,505
1
1
68.9
2026 Q1
12,769
1
0
78.3
2025 Q4
17,431
0
0
0.0
2025 Q3
15,124
0
0
0.0
2025 Q2
17,486
0
0
0.0
2025 Q1
12,011
10
0
832.6
2024 Q4
15,190
1
0
65.8
2024 Q3
14,235
10
4
702.5
Show 98 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
15,721
1
0
63.6
2024 Q1
13,893
7
3
503.9
2023 Q4
15,657
0
0
0.0
2023 Q3
14,709
15
9
1019.8
2023 Q2
14,808
0
0
0.0
2023 Q1
12,712
0
0
0.0
2022 Q4
13,702
5
2
364.9
2022 Q3
13,586
0
0
0.0
2022 Q2
12,644
3
1
237.3
2022 Q1
12,083
5
3
413.8
2021 Q4
11,103
0
0
0.0
2021 Q3
13,090
0
0
0.0
2021 Q2
9,539
1
0
104.8
2021 Q1
7,050
0
0
0.0
2020 Q4
13,805
2
0
144.9
2020 Q3
18,432
0
0
0.0
2020 Q2
12,391
0
0
0.0
2020 Q1
17,840
2
0
112.1
2019 Q4
13,657
2
0
146.4
2019 Q3
16,706
0
0
0.0
2019 Q2
14,649
1
1
68.3
2019 Q1
16,069
1
0
62.2
2018 Q4
14,673
0
0
0.0
2018 Q3
17,506
3
2
171.4
2018 Q2
16,838
0
0
0.0
2018 Q1
16,064
5
2
311.3
2017 Q4
11,820
0
0
0.0
2017 Q3
12,702
2
0
157.5
2017 Q2
11,509
1
0
86.9
2017 Q1
12,535
0
0
0.0
2016 Q4
13,143
8
1
608.7
2016 Q3
12,979
0
0
0.0
2016 Q2
12,754
3
0
235.2
2016 Q1
8,864
9
7
1015.3
2015 Q4
11,188
2
0
178.8
2015 Q3
9,666
0
0
0.0
2015 Q2
10,903
2
1
183.4
2015 Q1
9,110
1
0
109.8
2014 Q4
11,895
3
2
252.2
2014 Q3
9,691
2
2
206.4
2014 Q2
11,492
4
1
348.1
2014 Q1
10,403
2
1
192.3
2013 Q4
11,946
0
0
0.0
2013 Q3
9,791
0
0
0.0
2013 Q2
11,447
1
0
87.4
2013 Q1
8,463
0
0
0.0
2012 Q4
10,994
2
1
181.9
2012 Q3
10,021
0
0
0.0
2012 Q2
14,976
2
0
133.5
2012 Q1
9,100
0
0
0.0
2011 Q4
13,177
4
1
303.6
2011 Q3
11,775
0
0
0.0
2011 Q2
8,391
2
1
238.4
2011 Q1
8,045
0
0
0.0
2010 Q4
9,226
1
0
108.4
2010 Q3
9,281
0
0
0.0
2010 Q2
7,197
4
1
555.8
2010 Q1
6,513
0
0
0.0
2009 Q4
8,757
5
3
571.0
2009 Q3
6,898
0
0
0.0
2009 Q2
6,693
2
0
298.8
2009 Q1
6,597
0
0
0.0
2008 Q4
7,247
2
1
276.0
2008 Q3
10,147
3
2
295.7
2008 Q2
10,391
0
0
0.0
2008 Q1
9,409
9
5
956.5
2007 Q4
9,124
0
0
0.0
2007 Q3
10,386
1
1
96.3
2007 Q2
11,853
8
3
674.9
2007 Q1
12,883
0
0
0.0
2006 Q4
14,815
5
4
337.5
2006 Q3
16,150
0
0
0.0
2006 Q2
12,591
19
11
1509.0
2006 Q1
14,085
0
0
0.0
2005 Q4
15,488
8
1
516.5
2005 Q3
16,899
6
4
355.1
2005 Q2
14,024
5
0
356.5
2005 Q1
8,674
0
0
0.0
2004 Q4
11,546
6
1
519.7
2004 Q3
8,269
0
0
0.0
2004 Q2
10,524
19
4
1805.4
2004 Q1
8,885
4
0
450.2
2003 Q4
12,501
0
0
0.0
2003 Q3
11,642
11
3
944.9
2003 Q2
13,883
0
0
0.0
2003 Q1
10,559
0
0
0.0
2002 Q4
13,631
1
0
73.4
2002 Q3
11,741
5
2
425.9
2002 Q2
15,149
1
0
66.0
2002 Q1
9,350
0
0
0.0
2001 Q4
13,310
0
0
0.0
2001 Q3
10,111
3
0
296.7
2001 Q2
11,150
0
0
0.0
2001 Q1
7,391
6
1
811.8
2000 Q4
8,405
0
0
0.0
2000 Q3
9,508
0
0
0.0
2000 Q2
7,809
0
0
0.0
2000 Q1
7,194
0
0
0.0
Fatalities at this mine
1 recorded
June 14, 2024CA · Metal/Non-Metalfireman - locomotive, railroad clam operator, timekeeper, yard engine operatorFatality · FIRE
988 Loader caught fire, was unable to be extinguished by site personnel, 911 was called. Two fire crews arrived on site, one fireman approached the loader by the rear tire. The plant manager was yelling at them to get away from the tire. It exploded killing the fireman by the tire.
Reportable incidents
36 on file (excluding fatalities above)
2023 · 1 incident
March 11, 2023CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON
Climbing down from equipment on ladder. Felt a "pop" in left knee when when stepping on the ground.
2021 · 1 incident
March 25, 2021CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
Hi-Grade Materials Co · Caught in, under or between a moving and a stationary object
Employee was removing the bucket from front end loader and while removing the pins from the bucket, EE pinched EE's left fourth finger in between pins and bucket causing laceration to left fourth finger.
Pulling out stuck utility service truck with a backhoe and sustained wheel damage to backhoe.
October 3, 2020CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
Employee was shoveling mud near the conveyer belt. Employee lifted shovel full of mud and turned. While lifting and twisting, employee felt back pop and felt pain.
Employee was holding the scrapper when co-worker swung the sledge hammer and it slipped striking employee on right hand.
2014 · 1 incident
May 20, 2014CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
Hi-Grade Materials Co · Caught in, under or between a moving and a stationary object
IE and another EE were changing out a rubber skirt on BC27 (conveyor belt), IE pushed it and it went on top of the belt, IE walked around the pulley to get it off the belt, the other EE continued pushing it and caught IE's finger.
2013 · 1 incident
October 16, 2013CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON
As EE was getting off the loader, foot slipped on wet ladder/step as he held himself up with right arm to avoid falling off the loader he felt pain on his right arm.
2012 · 1 incident
July 9, 2012CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDTOOLS (NONPOWERED)
Rock stuck between blade and liner of dozer; employee used sledge hammer to dislodge rock. Rock came out and hit his left leg, cutting it.
2011 · 1 incident
October 5, 2011CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDTOOLS (NONPOWERED)
Hi-Grade Materials Co · Caught in, under or between a moving and a stationary object
Shoveling on BC19 clearing return roller, shovel hit the return roller and popped up, employees hand was between the shovel and the conveyor and ripped his left pinky finger nail off.
EE was using a pry tool to lift flexcos off a conveyor belt, tool slipped and hit him on his lower lip resulting in laceration of lower lip and fracture of 3 teeth.
June 17, 2010CA · Metal/Non-Metalmine manager, mine foreman, mine ownerHANDLING OF MATERIALS
Employee said he had been feeling pain in stomach area since yesterday - at 10:40 am employee was approaching an EE Quarry Foreman when he felt something popped in stomach and curled down in p ain. Employee was taken by EMT to Antelope Valley Hospital. Diagnois: Hernia.
April 2, 2010CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanPOWERED HAULAGE
Employee states that while driving a loader, hit a rock or bump and jarred the loader and hurt his back.
March 17, 2010CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
Employee was sent to High Desert Medical Group for yearly hearing exam on 2/1/10 doctor requested to see employee again for a follow up. Employee was seen on 3/22/10 and was recommended to see a specialist for moderate hearing lost. Employee claims the hearing lost began on 3/5/07.
February 26, 2007CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanMACHINERY
EE WAS LOOSENING TAIL PULLEY NUT, HAD HIS HAND ON THE NUT, ANOTHER EE SAT DOWN ON THE BELT CAUSING THE TAIL PULLEY TO SLIDE FORWARD, CATCHING HIS HAND.
August 2, 2002CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDTOOLS (NONPOWERED)
WORKING WITH LOADER. STEPPED OUT OF EXIT DOOR. EARTH WAS LOOSE AND GAVE WAY CAUSING BODY TO THRUST TO EE'S LEFT SIDE AND FALL DOWN. RIGHT LEG WAS CAUGHT IN DIRT.
1996 · 1 incident
November 20, 1996CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorMACHINERY
CUTTING METAL OUT OF CONE CRUSHER. WHILE USING WELDER, GOT A FLASH BURN TO EYES.
1994 · 1 incident
May 26, 1994CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
EMPLOYEE WAS STANDING ON THE FRAME OF THE JAW CRUSHER ASSISTING WITH THE INSTALLATION, LOST HIS FOOTING, SLIPPED AND FELL TO THE GROUND, APPROX. 10 FT.
1991 · 1 incident
October 12, 1991CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON
EMPLOYEE WAS ON TOP OF THE WET SCREEN PLANT WELDING EMPLOYEE WAS DISENGAGING A WELDING CABLE WHEN THE CABLE SUDDENLY WHIPPED AROUND THE TOP RAIL CATCHING HIS LEFT THUMB
January 25, 1988CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorMACHINERY
WHILE EMPLOYEE 4AS USING THE CUTTING TORCH ON A SECTION OF THE JAW CRUSHER A LARGE SPARK AND /OR A PIECE OF METAL BURNED A HOLE IN THE OXYFEN HOSE IT RUPTURED APPROX 1 INCH BAKC FROM THE TORCH HANDLE 3
1987 · 2 incidents
October 22, 1987CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON
EMPLOYEE WAS AT7EMPTING TO TIGHTEN JAW ON JAW CRUSHER EMPLOYEE STEPPED DOWN FROM MAIN FRAME OF PORTABLE CRUSHER ONTO TAILGATE OF A CO.VEHICLE TAILGATE SUDDENLY OPENED EMPLOYEE LOST BALANCE & RT.HAND(R-RING)3FINGER MADE CONTACT WITH FLY WHEEL DRIVE