Mammoth Coal safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Violation — cited standard not reported
ROAD FORK #52 MINE · 4609522Preshift examination at fixed intervals.
ROAD FORK #52 MINE · 460952230 CFR 75.360(f)
Mine ventilation plan; submission and approval.
ROAD FORK #52 MINE · 460952230 CFR 75.370(a)(1) · Significant and substantial (S&S)
Machinery
ROAD FORK #52 MINE · 4609522Days away from work only
Accident narrative
Employee had finished drilling the hole for the outside primary bolt. As EE began installing the glue, a piece of rock from the roof fell out, striking EE's left shoulder and arm.
Spot Inspections
ROAD FORK #52 MINE · 4609522103(i) · 5.0 on-site hours reported
Accumulation of combustible materials.
ROAD FORK #52 MINE · 460952230 CFR 75.400
Fire-resistant hydraulic fluids and fire suppression devices on underground equipment.
ROAD FORK #52 MINE · 460952230 CFR 75.1107-1(a)(3)(ii)
Spot Inspections
ROAD FORK #52 MINE · 4609522103(i) · 6.5 on-site hours reported
Electric equipment; examination, testing and maintenance.
ROAD FORK #52 MINE · 460952230 CFR 75.512
Handling of materials
ROAD FORK #52 MINE · 4609522Days away from work only
Accident narrative
While holding the shield covering the compressor in the air, employee states that the shield slipped from their hand, coming down and smashing their left fingers between shield and motor frame.
Loading and haulage equipment; installations.
Mammoth Coal Processing Pl & Riv Tipple · 460331730 CFR 77.1605(k)
Cable fittings; suitability.
ROAD FORK #52 MINE · 460952230 CFR 75.515
General instructions for completing MSHA Form 7000-1.
ROAD FORK #52 MINE · 460952230 CFR 50.20-1
Investigation.
ROAD FORK #52 MINE · 460952230 CFR 50.11(b)
Violation — cited standard not reported
ROAD FORK #52 MINE · 4609522Identification check system.
ROAD FORK #52 MINE · 460952230 CFR 75.1715
Sampling; general and technical requirements.
ROAD FORK #52 MINE · 460952230 CFR 71.201(d)
Communication facilities; working sections; installation and maintenance requirements; audible or visual alarms.
ROAD FORK #52 MINE · 460952230 CFR 75.1600-2(e)
Permissible electric face equipment; maintenance.
ROAD FORK #52 MINE · 460952230 CFR 75.503
Methane monitors.
ROAD FORK #52 MINE · 460952230 CFR 75.342(a)(4)
Permissible electric face equipment; maintenance.
ROAD FORK #52 MINE · 460952230 CFR 75.503
Roof bolting.
ROAD FORK #52 MINE · 460952230 CFR 75.204(c)(1)
Spot Inspections
ROAD FORK #52 MINE · 4609522103(i) · 4.5 on-site hours reported
Permissible electric face equipment; maintenance.
ROAD FORK #52 MINE · 460952230 CFR 75.503
Ventilation controls.
ROAD FORK #52 MINE · 460952230 CFR 75.333(h)
Sources and definitions
MSHA Violations (issue date), Accidents (accident date) and Inspections (begin date).
Violation titles use current CFR headings to identify the cited rule; they are not the inspector’s account of what happened.
Status is from the current MSHA Mines snapshot, not the selected reporting period. Closed records can retain their last reported controller/operator.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.