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Mammoth Coal safety activity

MSHA violations, accident reports and inspections across the current mine portfolio.

2025-01-01 – 2026-10-31Database snapshot · 2026-10-31

Safety activity

  1. Preshift examination at fixed intervals.

    violationRecord 5027859
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.360(f) · $151.00 proposed penalty

  2. Machinery

    accidentRecord 220261320012
    ROAD FORK #52 MINE · 4609522

    No dys awy frm wrk,no rstr act

    Accident narrative

    Employee stated, EE was drilling a bolt hole to strap a kettle bottom. A piece of the kettle bottom broke off striking EE on the right index finger, causing a fracture and seven sutures.

  3. Mine ventilation plan; submission and approval.

    violationRecord 9849740
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $592.00 proposed penalty

  4. Permanent splicing of trailing cables.

    violationRecord 9847596
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.604(b) · Significant and substantial (S&S) · $8,315.00 proposed penalty

  5. Methane monitors.

    violationRecord 9847595
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $1,037.00 proposed penalty

  6. Roof control plan.

    violationRecord 9847594
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $1,126.00 proposed penalty

  7. Methane monitors.

    violationRecord 9554308
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $313.00 proposed penalty

  8. Methane monitors.

    violationRecord 5090054
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $313.00 proposed penalty

  9. Mine ventilation plan; submission and approval.

    violationRecord 5090053
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $398.00 proposed penalty

  10. Methane monitors.

    violationRecord 5029793
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $313.00 proposed penalty

  11. Verbal Hazard Complaint Inspections

    inspectionRecord 6322290
    ROAD FORK #52 MINE · 4609522

    113.5 on-site hours reported

  12. Protection from falls of roof, face and ribs.

    violationRecord 5095173
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $1,550.00 proposed penalty

  13. Escapeways; bituminous and lignite mines.

    violationRecord 5020133
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.380(d)(7)(vii)(A) · $336.00 proposed penalty

  14. Inspection of fire suppression devices.

    violationRecord 5133238
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1107-16(b) · $336.00 proposed penalty

  15. Electric equipment; examination, testing and maintenance.

    violationRecord 5133237
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $288.00 proposed penalty

  16. Roof control plan.

    violationRecord 5133236
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $755.00 proposed penalty

  17. Mine ventilation plan; submission and approval.

    violationRecord 5133235
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · Significant and substantial (S&S) · $6,037.00 proposed penalty

  18. Preshift examination at fixed intervals.

    violationRecord 5027858
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.360(f) · $151.00 proposed penalty

  19. Permissible electric face equipment; maintenance.

    violationRecord 5133234
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $549.00 proposed penalty

  20. Accumulation of combustible materials.

    violationRecord 5133233
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $755.00 proposed penalty

  21. Preshift examination at fixed intervals.

    violationRecord 5133232
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.360(g) · $151.00 proposed penalty

  22. Permanent splicing of trailing cables.

    violationRecord 5133231
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.604(b) · $755.00 proposed penalty

  23. Methane monitors.

    violationRecord 5133230
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $313.00 proposed penalty

  24. Power wires and cables; insulation and protection.

    violationRecord 5133229
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.517 · $1,818.00 proposed penalty

  25. Spot Inspections

    inspectionRecord F0219CC
    ROAD FORK #52 MINE · 4609522

    103(i) · 5.0 on-site hours reported

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.