CHANDLER AGGREGATES - GILMAN SPRINGS has $67K in proposed MSHA penalties and $0 outstanding across 2 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
5
Years on record
2018–2026
Latest incident
Jun 2026
Compliance record
MSHA citations since 2002
75
citations
22
significant & substantial
$67,287
proposed penalties
$31,884
paid to date
47% of proposed penalties paid to date, a $35,403 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.
Rate withheld: 444 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
CHANDLER AGGREGATES - GILMAN SPRINGS has $67K in proposed MSHA penalties and $0 outstanding across 2 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.
$67K
proposed penalties
$32K
current assessed
$32K
paid to date
$0
outstanding
75 assessments are final orders; 2 contested dockets.
Of $49K in penalties contested before the Commission, $12K was upheld in final decisions.
As of the most recent assessment on 2026-01-28.
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.
10citations taken to the federal commission · 13% of citations on record
Settled
9 · 90%
Vacated or withdrawn
1 · 10%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 4 decided S&S contests · industry: 79%
75%
Penalty reduction in decided contests
$49K proposed, $12K 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 2023-07-10.
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: 2025-03-19
0%
of limit-tested samples over the exposure limit
5
samples
3
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz3
Nuisance dust, respirable, <1% Qtz1
Respirable dust, <.1mg1
Show the individual readings (5)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-03-19
Quartz, respirable, >1% Qtz
0.3
0.4
0.75
Crusher Oper/Worker
2021-12-02
Respirable dust, <.1mg
0
Truck Driver
2018-07-10
Quartz, respirable, >1% Qtz
0.27
Laborer, Bullgang
2002-11-14
Quartz, respirable, >1% Qtz
2.21
2.95
0.75
Crusher Oper/Worker
2002-11-14
Nuisance dust, respirable, <1% Qtz
0.19
10
0.02
Washer 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.
CHANDLER AGGREGATES - GILMAN SPRINGS recorded 3.54 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.
3.54
total case rate
3.54
days-away rate
0.000
fatality rate
Above 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 *
3.54
3.54
0.000
2024 *
0.00
0.00
0.000
2023 *
0.00
0.00
0.000
2022 *
0.00
0.00
0.000
2021 *
6.10
6.10
0.000
2020 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2018 *
6.97
6.97
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
22
2025
21
2024
15
2023
13
2022
13
2021
13
2020
13
2019
13
2018
11
2017
7
2003
0
2002
0
Source: MSHA quarterly employment and production, updated weekly.
CHANDLER AGGREGATES - GILMAN SPRINGS 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
14,213
0
0
0.0
2026 Q1
14,321
1
0
69.8
2025 Q4
14,814
0
0
0.0
2025 Q3
14,947
0
0
0.0
2025 Q2
14,033
0
0
0.0
2025 Q1
12,638
4
0
316.5
2024 Q4
11,807
0
0
0.0
2024 Q3
9,785
4
1
408.8
Show 34 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
10,542
0
0
0.0
2024 Q1
7,849
0
0
0.0
2023 Q4
8,655
3
1
346.6
2023 Q3
9,271
0
0
0.0
2023 Q2
9,280
3
1
323.3
2023 Q1
8,146
6
1
736.6
2022 Q4
8,156
0
0
0.0
2022 Q3
9,803
8
4
816.1
2022 Q2
9,174
0
0
0.0
2022 Q1
8,528
0
0
0.0
2021 Q4
7,753
5
3
644.9
2021 Q3
8,681
0
0
0.0
2021 Q2
8,267
5
1
604.8
2021 Q1
8,086
3
0
371.0
2020 Q4
7,537
0
0
0.0
2020 Q3
8,494
0
0
0.0
2020 Q2
7,316
1
0
136.7
2020 Q1
7,640
0
0
0.0
2019 Q4
7,984
5
1
626.3
2019 Q3
8,559
2
2
233.7
2019 Q2
8,474
0
0
0.0
2019 Q1
6,257
6
2
958.9
2018 Q4
6,815
0
0
0.0
2018 Q3
7,811
0
0
0.0
2018 Q2
7,569
3
2
396.4
2018 Q1
6,504
0
0
0.0
2017 Q4
5,800
0
0
0.0
2017 Q3
6,079
1
0
164.5
2017 Q2
4,363
0
0
0.0
2017 Q1
215
0
0
0.0
2003 Q3
0
0
0
2003 Q2
0
0
0
2003 Q1
0
0
0
2002 Q4
0
2
2
No fatalities recorded at this mine.
Reportable incidents
5 on file
2026 · 1 incident
June 10, 2026CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
The repair crew was replacing main frame liners in Sandvik cone crusher when Miner reached down to apply upward pressure on a liner which had already been tacked in. EE felt a pop and experienced pain in EE's arm.
2025 · 1 incident
October 4, 2025CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
Operator was mucking mud with excavator (Cat 365) when a hydraulic cylinder next to the cab burst. The window was shattered, and the operator was sprayed with hydraulic oil. Operator went to the hospital where EE was given a return to work without limits. EE chose to take the week off work. No injury, near miss only.
2023 · 1 incident
June 22, 2023CA · Metal/Non-Metalmaster mechanic, foreman, supervisorOTHER
Employee was in proximity of another employee welding when a piece of hot metal landed on shirt burning the employee's arm.
2018 · 1 incident
August 17, 2018CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS