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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. Mine ventilation plan; submission and approval.

    violationRecord 5132556
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $4,383.00 proposed penalty

  2. Accumulation of combustible materials.

    violationRecord 5132555
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $697.00 proposed penalty

  3. Ventilation controls.

    violationRecord 5132554
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.333(h) · $151.00 proposed penalty

  4. Installation of electric equipment and conductors; permissibility.

    violationRecord 5096655
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1002(a) · $151.00 proposed penalty

  5. Roof control plan.

    violationRecord 5096654
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · Significant and substantial (S&S) · $3,448.00 proposed penalty

  6. Maintenance of belt conveyors and belt conveyor entries.

    violationRecord 5096653
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1731(a) · $336.00 proposed penalty

  7. Handling of materials

    accidentRecord 220261940013
    ROAD FORK #52 MINE · 4609522

    No dys awy frm wrk,no rstr act

    Accident narrative

    Employee was lifting a timber, dropped it, causing it to smash EE's right thumb between a crib and the timber. This resulted in a laceration requiring three sutures.

  8. Spot Inspections

    inspectionRecord F036042
    ROAD FORK #52 MINE · 4609522

    103(i) · 5.0 on-site hours reported

  9. Spot Inspections

    inspectionRecord F036041
    ROAD FORK #52 MINE · 4609522

    103(i) · 7.0 on-site hours reported

  10. Methane monitors.

    violationRecord 5094506
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $465.00 proposed penalty

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

    violationRecord 5094505
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $3,184.00 proposed penalty

  12. Short circuit protection; ratings and settings of circuit breakers.

    violationRecord 5096652
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.601-1 · $336.00 proposed penalty

  13. Electric equipment; examination, testing and maintenance.

    violationRecord 5096651
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $642.00 proposed penalty

  14. Preshift examination at fixed intervals.

    violationRecord 5096650
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.360(f) · $226.00 proposed penalty

  15. Automatic fire sensors.

    violationRecord 5096649
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1103-1(b) · $504.00 proposed penalty

  16. Roof control plan.

    violationRecord 5096648
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · Significant and substantial (S&S) · $3,448.00 proposed penalty

  17. Regular Safety and Health Inspection

    inspectionRecord F025BEC
    ROAD FORK #52 MINE · 4609522

    696.0 on-site hours reported

  18. Spot Inspections

    inspectionRecord F0219D2
    ROAD FORK #52 MINE · 4609522

    103(i) · 6.3 on-site hours reported

  19. Spot Inspection

    inspectionRecord F020DB3
    ROAD FORK #52 MINE · 4609522

    6.8 on-site hours reported

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

    violationRecord 5099389
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $1,431.00 proposed penalty

  21. Spot Inspections

    inspectionRecord F0219D1
    ROAD FORK #52 MINE · 4609522

    103(i) · 7.8 on-site hours reported

  22. Mine ventilation plan; submission and approval.

    violationRecord 5097983
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $1,126.00 proposed penalty

  23. Roof control plan.

    violationRecord 5097982
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $697.00 proposed penalty

  24. Verbal Hazard Complaint Inspections

    inspectionRecord F005E88
    ROAD FORK #52 MINE · 4609522

    39.0 on-site hours reported

  25. Mine ventilation plan; submission and approval.

    violationRecord 5097981
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $1,126.00 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.