MSHA record for Empire Quarry (mine ID 0404954). Fatalities, non-fatal incidents grouped by year, current operator and controller, and mine context.
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Fatalities
0
Total incidents
2
Years on record
2019–2020
Latest incident
May 2020
Inspection activity
MSHA inspections since 2019
3
inspections on record
58
inspection hours
n/a
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: 58 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
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: 2020-09-02, 5 years ago
2
samples
0
limit-tested
Most sampled contaminants
Respirable dust, <.1mg2
Show the individual readings (2)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2020-09-02
Respirable dust, <.1mg
0
Front-end Loader Operator
2020-09-02
Respirable dust, <.1mg
0
Truck Driver
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2020
9
2019
12
2018
9
2008
5
Source: MSHA quarterly employment and production, updated weekly.
Empire 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
2020 Q4
4
0
0
0.0
2020 Q3
5,577
0
0
0.0
2020 Q2
5,989
0
0
0.0
2020 Q1
5,292
0
0
0.0
2019 Q4
3,864
0
0
0.0
2019 Q3
6,340
0
0
0.0
2019 Q2
4,163
0
0
0.0
2019 Q1
3,741
0
0
0.0
Show 3 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2018 Q4
1,513
0
0
0.0
2008 Q2
2,149
0
0
0.0
2008 Q1
393
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
2 on file
2020 · 1 incident
May 6, 2020CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
While replacing the right front flat tire on a 2004 crew vehicle, employee strained back and ribs. Employee was offered help from another worker, employee declined help.