Mammoth Coal safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Machinery and equipment; operation and maintenance.
ROAD FORK #52 MINE · 460952230 CFR 75.1725(a) · Significant and substantial (S&S) · $1,219.00 proposed penalty
Mine ventilation plan; submission and approval.
ROAD FORK #52 MINE · 460952230 CFR 75.370(a)(1) · $1,037.00 proposed penalty
Accumulation of combustible materials.
ROAD FORK #52 MINE · 460952230 CFR 75.400 · $883.00 proposed penalty
Automatic emergency-parking brakes.
ROAD FORK #52 MINE · 460952230 CFR 75.523-3(c)(2) · $177.00 proposed penalty
Transportation of liquefied and nonliquefied compressed gas cylinders; requirements.
ROAD FORK #52 MINE · 460952230 CFR 75.1106-2(a)(1) · $398.00 proposed penalty
Spot Inspections
ROAD FORK #52 MINE · 4609522103(i) · 5.5 on-site hours reported
Mine ventilation plan; submission and approval.
ROAD FORK #52 MINE · 460952230 CFR 75.370(a)(1) · $313.00 proposed penalty
Accumulation of combustible materials.
ROAD FORK #52 MINE · 460952230 CFR 75.400 · $398.00 proposed penalty
Permissible electric face equipment; maintenance.
ROAD FORK #52 MINE · 460952230 CFR 75.503 · $642.00 proposed penalty
Permissible electric face equipment; maintenance.
ROAD FORK #52 MINE · 460952230 CFR 75.503 · $642.00 proposed penalty
Mechanical equipment guards.
ROAD FORK #52 MINE · 460952230 CFR 75.1722(a) · $267.00 proposed penalty
Accumulation of combustible materials.
ROAD FORK #52 MINE · 460952230 CFR 75.400 · $883.00 proposed penalty
Accumulation of combustible materials.
ROAD FORK #52 MINE · 460952230 CFR 75.400 · $959.00 proposed penalty
Electric equipment; examination, testing and maintenance.
ROAD FORK #52 MINE · 460952230 CFR 75.512 · $755.00 proposed penalty
Roof control plan.
ROAD FORK #52 MINE · 460952230 CFR 75.220(a)(1) · $959.00 proposed penalty
Mine ventilation plan; submission and approval.
ROAD FORK #52 MINE · 460952230 CFR 75.370(a)(1) · $697.00 proposed penalty
Escapeways; bituminous and lignite mines.
ROAD FORK #52 MINE · 460952230 CFR 75.380(d)(7)(vi) · $398.00 proposed penalty
Accumulation of combustible materials.
ROAD FORK #52 MINE · 460952230 CFR 75.400 · $398.00 proposed penalty
Permissible electric face equipment; maintenance.
ROAD FORK #52 MINE · 460952230 CFR 75.503 · $288.00 proposed penalty
Machinery and equipment; operation and maintenance.
ROAD FORK #52 MINE · 460952230 CFR 75.1725(a) · $267.00 proposed penalty
Accumulation of combustible materials.
ROAD FORK #52 MINE · 460952230 CFR 75.400 · $883.00 proposed penalty
Preshift examination at fixed intervals.
ROAD FORK #52 MINE · 460952230 CFR 75.360(f) · $151.00 proposed penalty
Protection from falls of roof, face and ribs.
ROAD FORK #52 MINE · 460952230 CFR 75.202(a) · Significant and substantial (S&S) · $6,037.00 proposed penalty
Power wires and cables; insulation and protection.
ROAD FORK #52 MINE · 460952230 CFR 75.517 · Significant and substantial (S&S) · $5,144.00 proposed penalty
Methane monitors.
ROAD FORK #52 MINE · 460952230 CFR 75.342(a)(4) · $432.00 proposed penalty
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.