Thousand Palms Pit has $33K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
35
Years on record
1989–2006
Latest incident
May 2006
Compliance record
MSHA citations since 2000
172
citations
42
significant & substantial
$32,578
proposed penalties
$32,075
paid to date
98% of proposed penalties paid to date, a $503 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.
172 citations across 1,033 inspection hours.
Source: MSHA inspections data, updated weekly.
Thousand Palms Pit has $33K 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.
$33K
proposed penalties
$32K
current assessed
$32K
paid to date
$0
outstanding
171 assessments are final orders; 1 contested dockets.
Of $6K in penalties contested before the Commission, $5K was upheld in final decisions.
As of the most recent assessment on 2026-05-13.
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.
2citations taken to the federal commission · 1% of citations on record
Settled
2 · 100%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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%
9%
Penalty reduction in decided contests
$6K proposed, $5K 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 2007-08-16.
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: 2026-01-08
0%
of limit-tested samples over the exposure limit
10
samples
5
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz8
Respirable dust, <.1mg2
Show the individual readings (10)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-01-08
Quartz, respirable, >1% Qtz
0.28
0.75
0.37
Laborer, Bullgang
2021-10-14
Quartz, respirable, >1% Qtz
0.24
Utility Man
2021-01-07
Quartz, respirable, >1% Qtz
0.21
Utility Man
2021-01-07
Quartz, respirable, >1% Qtz
0.21
Utility Man
2017-04-19
Respirable dust, <.1mg
0
Laborer, Bullgang
2011-05-10
Quartz, respirable, >1% Qtz
0.13
1.22
0.11
Front-end Loader Operator
2005-09-28
Quartz, respirable, >1% Qtz
0.19
0.74
0.26
Dry Screen Plant Operator
2005-09-28
Respirable dust, <.1mg
0
Front-end Loader Operator
2002-05-07
Quartz, respirable, >1% Qtz
0.62
0.72
0.86
Crusher Oper/Worker
2002-05-07
Quartz, respirable, >1% Qtz
0.14
0.88
0.16
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.
Thousand Palms Pit recorded 0.00 reportable injury cases per 100 full-time workers in 2008.
Injury rate, 2008
ⓘ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 3.15 and the all-US-mining average was 3.61 cases per 100 workers.
In California, metal and nonmetal mining averaged 3.34 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
2008 *
0.00
0.00
0.000
2007 *
0.00
0.00
0.000
2006 *
3.85
3.85
0.000
2005 *
8.60
4.30
0.000
2004 *
4.17
0.00
0.000
2003 *
22.28
22.28
0.000
2002 *
20.64
15.48
0.000
2001 *
11.34
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
7
2025
6
2024
6
2023
6
2022
7
2021
8
2020
8
2019
7
2018
5
2017
4
2016
6
2015
5
2014
5
2013
5
2012
5
2011
5
2010
4
2009
7
2008
14
2007
19
2006
22
2005
19
2004
19
2003
17
2002
16
2001
15
2000
16
Source: MSHA quarterly employment and production, updated weekly.
Thousand Palms Pit sits in Riverside 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.
Riverside County, California · Population 2,449,909
0.1%
Mining share of county employment
$89,672
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
4,102
6
4
1462.7
2026 Q1
3,477
5
2
1438.0
2025 Q4
4,424
0
0
0.0
2025 Q3
3,779
0
0
0.0
2025 Q2
3,755
3
1
798.9
2025 Q1
2,378
0
0
0.0
2024 Q4
2,497
3
0
1201.4
2024 Q3
3,082
0
0
0.0
Show 98 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
3,746
1
1
267.0
2024 Q1
3,457
0
0
0.0
2023 Q4
2,961
2
2
675.4
2023 Q3
3,350
5
1
1492.5
2023 Q2
2,799
0
0
0.0
2023 Q1
3,429
1
0
291.6
2022 Q4
3,102
0
0
0.0
2022 Q3
3,871
0
0
0.0
2022 Q2
3,095
2
1
646.2
2022 Q1
3,844
0
0
0.0
2021 Q4
4,045
4
2
988.9
2021 Q3
2,461
0
0
0.0
2021 Q2
3,366
1
0
297.1
2021 Q1
2,925
4
1
1367.5
2020 Q4
3,669
0
0
0.0
2020 Q3
3,175
2
1
629.9
2020 Q2
2,773
0
0
0.0
2020 Q1
3,154
1
0
317.1
2019 Q4
2,591
1
0
386.0
2019 Q3
1,937
0
0
0.0
2019 Q2
3,020
1
0
331.1
2019 Q1
2,976
0
0
0.0
2018 Q4
1,879
0
0
0.0
2018 Q3
2,980
0
0
0.0
2018 Q2
2,460
0
0
0.0
2018 Q1
2,980
1
0
335.6
2017 Q4
1,548
0
0
0.0
2017 Q3
2,080
0
0
0.0
2017 Q2
1,614
0
0
0.0
2017 Q1
1,945
0
0
0.0
2016 Q4
1,683
0
0
0.0
2016 Q3
2,536
0
0
0.0
2016 Q2
2,227
0
0
0.0
2016 Q1
3,364
0
0
0.0
2015 Q4
1,782
1
1
561.2
2015 Q3
1,937
1
0
516.3
2015 Q2
1,685
0
0
0.0
2015 Q1
2,071
2
1
965.7
2014 Q4
2,319
0
0
0.0
2014 Q3
2,808
0
0
0.0
2014 Q2
1,322
0
0
0.0
2014 Q1
2,157
0
0
0.0
2013 Q4
2,238
0
0
0.0
2013 Q3
2,649
0
0
0.0
2013 Q2
2,452
0
0
0.0
2013 Q1
1,824
0
0
0.0
2012 Q4
1,980
1
0
505.1
2012 Q3
1,972
0
0
0.0
2012 Q2
1,327
0
0
0.0
2012 Q1
1,533
0
0
0.0
2011 Q4
1,241
0
0
0.0
2011 Q3
2,186
1
0
457.5
2011 Q2
1,873
1
0
533.9
2011 Q1
1,796
0
0
0.0
2010 Q4
1,849
1
0
540.8
2010 Q3
1,490
0
0
0.0
2010 Q2
568
2
0
3521.1
2010 Q1
432
4
1
9259.3
2009 Q4
800
0
0
0.0
2009 Q3
3,199
0
0
0.0
2009 Q2
4,055
1
0
246.6
2009 Q1
3,858
0
0
0.0
2008 Q4
5,135
6
2
1168.5
2008 Q3
5,422
0
0
0.0
2008 Q2
6,627
2
0
301.8
2008 Q1
9,564
2
0
209.1
2007 Q4
9,882
0
0
0.0
2007 Q3
9,779
0
0
0.0
2007 Q2
11,405
4
1
350.7
2007 Q1
11,404
0
0
0.0
2006 Q4
11,473
9
3
784.5
2006 Q3
13,076
20
4
1529.5
2006 Q2
13,291
0
0
0.0
2006 Q1
14,163
14
0
988.5
2005 Q4
14,581
0
0
0.0
2005 Q3
10,887
10
2
918.5
2005 Q2
9,577
0
0
0.0
2005 Q1
11,452
7
2
611.2
2004 Q4
14,027
0
0
0.0
2004 Q3
12,196
6
0
492.0
2004 Q2
11,334
0
0
0.0
2004 Q1
10,373
5
2
482.0
2003 Q4
12,501
0
0
0.0
2003 Q3
11,027
0
0
0.0
2003 Q2
11,040
3
1
271.7
2003 Q1
10,324
3
0
290.6
2002 Q4
10,235
0
0
0.0
2002 Q3
9,827
3
1
305.3
2002 Q2
9,721
3
0
308.6
2002 Q1
8,968
0
0
0.0
2001 Q4
9,287
0
0
0.0
2001 Q3
9,136
8
1
875.7
2001 Q2
9,042
0
0
0.0
2001 Q1
7,821
0
0
0.0
2000 Q4
8,410
4
0
475.6
2000 Q3
9,156
0
0
0.0
2000 Q2
12,466
3
2
240.7
2000 Q1
8,785
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
35 on file
2006 · 1 incident
May 31, 2006CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanMACHINERY
A mound of 3' rocks formed on the conveyor belt to the left side of the employee. A 5' rock fell from the table and hit the employee at knee level on the right leg.
2005 · 2 incidents
December 15, 2005CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorPOWERED HAULAGE
A-1 Aggregates Inc · Caught in, under or between a moving and a stationary object
Employee was talking to another operator. He stopped, did not exit his tractor, rolled his side window and caught his hand and all five fingers between the sliding door opening.
January 5, 2005CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanMACHINERY
While employee was using a grinding wheel it came apart and hit his right knee.
2004 · 1 incident
September 21, 2004CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
A-1 Aggregates Inc · Caught in, under or between a moving and a stationary object
Working on screen deck at plant and pinched pointer finger on left hand and declined medical treatment at that time. on 10/14/04, came to office and stated that he wanted to go see a dr to make sure nothing was broken, so sent him to immediate care. dr report was possible hairline fracture and would follow up with a visit on 11-4-04. returned to work with no time lost.
2003 · 5 incidents
December 23, 2003CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanPOWERED HAULAGE
EE WAS GRADING YARD WHEN SOMETHING FLEW INTO LEFT EYE IRRITATING PRIOR INJURY.
September 30, 2003CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
CHANGING CUTTING EDGE WITH IMPACT WRENCH ON VOLVO LOADER.
2002 · 4 incidents
December 2, 2002CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
WORKING ON THE DRAGLINE, HE JUMPED OFF WHEN CABLE SLIPPED.
September 18, 2002CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techMACHINERY
A-1 Aggregates Inc · Absorption of radiations, caustics, toxic and noxious substances
WHILE WORKING ON FLY ASH BIN, HOSE WAS PRESSURRIZED AND FLY ASH MATERIAL GOT INTO EYES.
September 3, 2002CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
WHILE WORKING ON MIXER TRUCK IN SHOP, PIECE OF METAL FLEW INTO LEFT EYE.
March 12, 2001CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS