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: 39 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘA Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
1
Section 107(a) orders
Most recent order: 2023-08-16.
On record since 2023.
Source: MSHA imminent-danger order records, updated weekly.
63 MOBILE 2 has $4K 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.
$4K
proposed penalties
$4K
current assessed
$4K
paid to date
$0
outstanding
7 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2024-06-07.
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 controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
6
2025
0
2024
1
2023
2
2022
2
Source: MSHA quarterly employment and production, updated weekly.
63 MOBILE 2 sits in Custer County, South Dakota, where the Census mining category is 2.8% 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.
Custer County, South Dakota · Population 8,686
2.8%
Mining share of county employment
$81,958
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
2,267
0
0
0.0
2026 Q1
0
0
0
2025 Q4
0
0
0
2025 Q3
0
0
0
2025 Q2
0
0
0
2025 Q1
0
0
0
2024 Q4
0
0
0
2024 Q3
621
0
0
0.0
Show 8 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
699
3
0
4291.8
2024 Q1
1,054
0
0
0.0
2023 Q4
592
0
0
0.0
2023 Q3
1,815
4
1
2203.9
2023 Q1
842
0
0
0.0
2022 Q4
1,089
0
0
0.0
2022 Q3
853
0
0
0.0
2022 Q2
427
1
0
2341.9
No fatalities recorded at this mine.
Reportable incidents
1 on file
2024 · 1 incident
February 7, 2024SD · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON