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: 467 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Detroit City Mine has $6K 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.
$6K
proposed penalties
$6K
current assessed
$6K
paid to date
$0
outstanding
37 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2024-01-26.
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: 2022-06-15, 4 years ago
33%
of limit-tested samples over the exposure limit
11
samples
3
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz41 over
Respirable dust, <.1mg4
Unlisted Particulate, respirable, <1% Qtz2
Diesel particulate (total carbon)1
Show the individual readings (13)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2018-11-28
Quartz, respirable, >1% Qtz
1.41
1.04
1.36
Drill Oper., Jackleg/Stoper
2022-06-15
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-06-15
Respirable dust, <.1mg
0
Supervisor, Co. Official
2022-06-15
Quartz, respirable, >1% Qtz
0.13
Slusher Operator
2022-06-15
Unlisted Particulate, respirable, <1% Qtz
0.2
Laborer, Bullgang
2019-07-31
EC @ 160
0
160
0.00
Laborer, Bullgang
2019-07-31
Quartz, respirable, >1% Qtz
0.33
0.83
0.40
Miner, Stope
2019-07-31
TC @ 160
0
160
0.00
Laborer, Bullgang
2019-07-31
Respirable dust, <.1mg
0
Miner, Stope
2019-07-31
Respirable dust, <.1mg
0
Laborer, Bullgang
2019-07-31
TC from EC @ 160
0
160
0.00
Laborer, Bullgang
2018-11-28
Quartz, respirable, >1% Qtz
0.49
Laborer, Bullgang
2018-11-28
Unlisted Particulate, respirable, <1% Qtz
2.36
Drill Oper., Jackleg/Stoper
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
2024
4
2023
6
2022
7
2021
8
2020
6
2019
5
2018
4
2017
3
2016
0
Source: MSHA quarterly employment and production, updated weekly.
Detroit City Mine sits in Park County, Colorado, where the Census mining category is 0.7% 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.
Park County, Colorado · Population 17,739
0.7%
Mining share of county employment
$95,450
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
2024 Q3
3,400
0
0
0.0
2024 Q2
2,730
0
0
0.0
2024 Q1
0
1
0
2023 Q4
3,300
0
0
0.0
2023 Q3
4,000
0
0
0.0
2023 Q2
3,525
0
0
0.0
2023 Q1
300
0
0
0.0
2022 Q4
3,280
1
0
304.9
Show 24 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2022 Q3
3,430
2
0
583.1
2022 Q2
2,740
5
1
1824.8
2022 Q1
1,085
0
0
0.0
2021 Q4
3,560
1
0
280.9
2021 Q3
3,520
0
0
0.0
2021 Q2
2,400
2
0
833.3
2021 Q1
2,500
3
0
1200.0
2020 Q4
3,750
0
0
0.0
2020 Q3
4,205
2
0
475.6
2020 Q2
2,210
3
0
1357.5
2020 Q1
0
0
0
2019 Q4
3,200
5
1
1562.5
2019 Q3
3,300
3
1
909.1
2019 Q2
3,650
0
0
0.0
2019 Q1
0
0
0
2018 Q4
2,750
2
1
727.3
2018 Q3
2,505
2
0
798.4
2018 Q2
2,748
2
0
727.8
2018 Q1
0
0
0
2017 Q4
1,450
0
0
0.0
2017 Q3
1,195
2
0
1673.6
2017 Q2
654
1
0
1529.1
2017 Q1
0
0
0
2016 Q4
0
0
0
No fatalities recorded at this mine.
Reportable incidents
1 on file
2022 · 1 incident
June 29, 2022CO · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
At 10:30 am EE was climbing into the cab of Loader which was 5'1" from ground. While stepping onto cab EE lost control of EE's three points of contact causing EE to fall. EE landed on right side causing EE's injuries. EE has acquired a fracture in right hip, right wrist, left thumb. There was no property damage at site.