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: 166 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Frink has $3K in proposed MSHA penalties and $0 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.
$3K
proposed penalties
$3K
current assessed
$3K
paid to date
$0
outstanding
18 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-05-14.
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: 2026-05-14
3
samples
0
limit-tested
Most sampled contaminants
Respirable dust, <.1mg3
Show the individual readings (3)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-05-14
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-08-23
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-04-27
Respirable dust, <.1mg
0
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
6
2025
5
2024
6
2023
5
2022
5
2021
3
2008
5
2003
2
2002
1
2001
4
2000
4
Source: MSHA quarterly employment and production, updated weekly.
Frink sits in Imperial County, California, where the Census mining category is 0.3% 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.
Imperial County, California · Population 179,319
0.3%
Mining share of county employment
$56,393
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
2,362
1
1
423.4
2026 Q1
2,034
1
1
491.6
2025 Q4
1,850
0
0
0.0
2025 Q3
1,916
0
0
0.0
2025 Q2
1,691
0
0
0.0
2025 Q1
1,476
2
1
1355.0
2024 Q4
1,599
0
0
0.0
2024 Q3
1,956
2
0
1022.5
Show 28 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
2,161
0
0
0.0
2024 Q1
1,601
6
3
3747.7
2023 Q4
2,056
0
0
0.0
2023 Q3
2,309
0
0
0.0
2023 Q2
1,887
0
0
0.0
2023 Q1
1,758
0
0
0.0
2022 Q4
2,449
0
0
0.0
2022 Q3
1,181
0
0
0.0
2022 Q2
2,086
2
1
958.8
2022 Q1
1,415
0
0
0.0
2021 Q4
2,065
0
0
0.0
2021 Q3
661
2
1
3025.7
2021 Q2
75
0
0
0.0
2008 Q2
746
0
0
0.0
2003 Q2
29
0
0
0.0
2003 Q1
21
0
0
0.0
2002 Q4
11
0
0
0.0
2002 Q3
9
0
0
0.0
2002 Q2
7
1
0
142857.1
2002 Q1
30
0
0
0.0
2001 Q4
78
0
0
0.0
2001 Q3
133
0
0
0.0
2001 Q2
508
0
0
0.0
2001 Q1
3,933
1
0
254.3
2000 Q4
2,306
0
0
0.0
2000 Q3
227
0
0
0.0
2000 Q2
111
0
0
0.0
2000 Q1
13
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
5 on file
1994 · 1 incident
November 2, 1994CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorPOWERED HAULAGE
WHILE EMPLOYEE WAS HELPING TO CHANGE SCREENS AT PLANT HE BECAME DIZZY, OVERHEATED AND STARTED VOMITING. HIS FOREMAN IMMEDIATELY TOOK HIM TO VALLEY URGENT CARE IN EL CENTRO WHERE HE WAS TRANSFE RRED TO EL CENTRO MEDICAL CENTER. ON 9-29-91 WHILE STILL IN HOSPITAL, EMPLOYEE DIED.
EMPLOYEE WAS TAKING A TRAMP RELIEFT CYLINDER APART. WHILE TRYING TO REMOVE A PISTON FROM THE BAD CYLINDER, THE PISTON BLEW OUT AND SMASHED THE EMPLOYEE'S MIDDLE FINGER ON LEFT HAND.
February 12, 1991CA · Metal/Non-Metalbeltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor riderHANDLING OF MATERIALS