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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 5135073
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1)

  2. Other safeguards.

    violationRecord 5135072
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1403

  3. Electric equipment; examination, testing and maintenance.

    violationRecord 5134679
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512

  4. Permissible electric face equipment; maintenance.

    violationRecord 5134678
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503

  5. Power wires and cables; insulation and protection.

    violationRecord 5135415
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.517 · Significant and substantial (S&S)

  6. Permissible electric face equipment; maintenance.

    violationRecord 5135414
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503

  7. Electric equipment; examination, testing and maintenance.

    violationRecord 5135413
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512

  8. Permanent splicing of trailing cables.

    violationRecord 5135071
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.604(b) · Significant and substantial (S&S)

  9. Electric equipment; examination, testing and maintenance.

    violationRecord 5135070
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512

  10. Preshift examination at fixed intervals.

    violationRecord 5134677
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.360(g)

  11. Accumulation of combustible materials.

    violationRecord 5134676
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400

  12. Preshift examination at fixed intervals.

    violationRecord 5134675
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.360(b)

  13. Preshift examination at fixed intervals.

    violationRecord 5134674
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.360(f)

  14. Machinery

    accidentRecord 220263000022
    ROAD FORK #52 MINE · 4609522

    No dys awy frm wrk,no rstr act

    Accident narrative

    Employee was in the process of repositioning an MRS unit for the next lift. The canopy of the MRS unit caught the bottom of a cable bolt causing the nut to shear off and project back to the operator and striking them in the upper lip, resulting in a laceration.

  15. Verbal Hazard Complaint Inspections

    inspectionRecord F02B53D
    ROAD FORK #52 MINE · 4609522

    17.5 on-site hours reported

  16. Spot Inspections

    inspectionRecord F02A97F
    ROAD FORK #52 MINE · 4609522

    103(i) · 9.0 on-site hours reported

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

    violationRecord 5135412
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S)

  18. Electric equipment; examination, testing and maintenance.

    violationRecord 5135411
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512

  19. Mine ventilation plan; submission and approval.

    violationRecord 5135410
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1)

  20. Violation — cited standard not reported

    violationRecord 5133944
    ROAD FORK #52 MINE · 4609522

  21. Mine ventilation plan; submission and approval.

    violationRecord 5135409
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1)

  22. Fall of roof or back

    accidentRecord 220262990011
    ROAD FORK #52 MINE · 4609522

    Accident only

    Accident narrative

    A non-injury roof fall above anchorage occurred on the #5 section during retreat mining, in the #7 entry in the #36 crosscut on 10/20/2026 at 11:04pm.

  23. Spot Inspections

    inspectionRecord F02EE14
    ROAD FORK #52 MINE · 4609522

    103(i) · 5.5 on-site hours reported

  24. Non-Injury Accident Investigation

    inspectionRecord F04D757
    ROAD FORK #52 MINE · 4609522

    8.0 on-site hours reported

  25. Methane monitors.

    violationRecord 5131430
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · Significant and substantial (S&S)

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.