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: 302 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Scheerer Quarry has $4K in proposed MSHA penalties and $123 outstanding across 0 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
$123
outstanding
28 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-08-13.
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.
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: 2025-08-14
5
samples
0
limit-tested
Most sampled contaminants
Respirable dust, <.1mg3
Quartz, respirable, >1% Qtz2
Show the individual readings (5)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-08-14
Quartz, respirable, >1% Qtz
0.12
Laborer, Bullgang
2022-10-19
Quartz, respirable, >1% Qtz
0.38
Dry Screen Plant Operator
2022-10-19
Respirable dust, <.1mg
0
Shovel Operator
2020-03-11
Respirable dust, <.1mg
0
Cleanup Man
2020-03-11
Respirable dust, <.1mg
0
Dry Screen Plant 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.
Scheerer 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 *
10.74
5.37
0.000
2023 *
6.91
0.00
0.000
2022 *
14.42
0.00
0.000
2021 *
0.00
0.00
0.000
2020 *
7.74
0.00
0.000
2019 *
9.57
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
21
2025
20
2024
17
2023
16
2022
16
2021
17
2020
17
2019
13
2018
5
2017
4
2016
2
2015
1
Source: MSHA quarterly employment and production, updated weekly.
Scheerer Quarry sits in San Bernardino 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.
San Bernardino County, California · Population 2,187,816
0.1%
Mining share of county employment
$82,184
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
12,121
0
0
0.0
2026 Q1
12,680
0
0
0.0
2025 Q4
13,176
0
0
0.0
2025 Q3
13,888
1
0
72.0
2025 Q2
10,841
0
0
0.0
2025 Q1
10,035
0
0
0.0
2024 Q4
8,824
4
1
453.3
2024 Q3
8,996
0
0
0.0
Show 35 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
10,257
0
0
0.0
2024 Q1
9,168
0
0
0.0
2023 Q4
7,249
4
1
551.8
2023 Q3
8,077
0
0
0.0
2023 Q2
7,194
1
0
139.0
2023 Q1
6,431
0
0
0.0
2022 Q4
6,214
1
0
160.9
2022 Q3
6,971
0
0
0.0
2022 Q2
7,854
1
0
127.3
2022 Q1
6,697
1
0
149.3
2021 Q4
6,103
0
0
0.0
2021 Q3
5,993
0
0
0.0
2021 Q2
6,303
0
0
0.0
2021 Q1
6,211
0
0
0.0
2020 Q4
7,565
1
0
132.2
2020 Q3
6,712
0
0
0.0
2020 Q2
4,833
1
0
206.9
2020 Q1
6,740
3
1
445.1
2019 Q4
6,925
0
0
0.0
2019 Q3
5,944
0
0
0.0
2019 Q2
3,545
0
0
0.0
2019 Q1
4,489
1
0
222.8
2018 Q4
5,375
0
0
0.0
2018 Q3
3,749
0
0
0.0
2018 Q2
4,030
0
0
0.0
2018 Q1
2,635
0
0
0.0
2017 Q4
1,445
1
0
692.0
2017 Q3
1,314
0
0
0.0
2017 Q2
2,989
0
0
0.0
2017 Q1
1,450
0
0
0.0
2016 Q4
1,425
0
0
0.0
2016 Q3
578
0
0
0.0
2016 Q2
517
0
0
0.0
2016 Q1
548
0
0
0.0
2015 Q4
422
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
7 on file
2024 · 2 incidents
July 30, 2024CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techPOWERED HAULAGE
The employee was operating CAT loader 980M, feeding the crushing plant. On frequent occasions, EE would hit boulders that were not visible. During the shift, the employee stated that their back was sore.
April 25, 2024CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSTRIKING OR BUMPING
The employee walked to the back of screen 1, middle section, to shovel material off the deck. As EE walked to the middle section, EE's left shoulder made contact with the screen while it was operating.
2023 · 1 incident
October 3, 2023CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerPOWERED HAULAGE
The employee states was diagnosed with a hernia from performing various tasks. The employee cannot determine a specific task from job responsibilities.
February 22, 2022CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techMACHINERY
The employee was using a grinder, to cut the head of a bolt that was placed on a vise. The grinder kicked back and cut the left index finger.
2020 · 1 incident
September 21, 2020CA · Metal/Non-Metalassistant mine foreman, assistant mine managerHANDLING OF MATERIALS
CalPortland · Caught in, under or between a moving and a stationary object
The employee was inspecting a leaky radiator on a portable screen. The employee was sliding a steel plate off the engine compartment of a portable screen plant when the weight of the plate transferred down. The hand was on the plate that was lifted up. The finger got caught between the head pulley scraper and the metal plate.
2019 · 1 incident
July 24, 2019CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS