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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. Protection from falls of roof, face and ribs.

    violationRecord 5133228
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $17,082.00 proposed penalty

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

    violationRecord 5133227
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $17,082.00 proposed penalty

  3. Roof control plan.

    violationRecord 5132524
    ROAD FORK #52 MINE · 4609522

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

  4. Mine ventilation plan; submission and approval.

    violationRecord 5132523
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $1,219.00 proposed penalty

  5. Accumulation of combustible materials.

    violationRecord 5098562
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $313.00 proposed penalty

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

    violationRecord 5098561
    ROAD FORK #52 MINE · 4609522

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

  7. Drill dust control at underground areas of underground mines.

    violationRecord 5096607
    ROAD FORK #52 MINE · 4609522

    30 CFR 72.630(b) · $288.00 proposed penalty

  8. Fall of face/rib/pillar/side/highwall

    accidentRecord 220261210003
    ROAD FORK #52 MINE · 4609522

    Days away from work only

    Accident narrative

    Employee stated, EE was walking by the corner in number nine entry, when the corner fell out striking EE on the left side of EE's upper back.

  9. Spot Inspections

    inspectionRecord F005E7E
    ROAD FORK #52 MINE · 4609522

    103(i) · 5.5 on-site hours reported

  10. Methane monitors.

    violationRecord 5097277
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $336.00 proposed penalty

  11. Records of certified and qualified persons.

    violationRecord 5096606
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.159 · $151.00 proposed penalty

  12. Fall of face/rib/pillar/side/highwall

    accidentRecord 220261200002
    ROAD FORK #52 MINE · 4609522

    Days away from work only

    Accident narrative

    While loading in the number ten entry, a piece of coal rib rolled out striking the employee's left ankle.

  13. Condition and examination of firefighting equipment.

    violationRecord 5096605
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1100-3 · $398.00 proposed penalty

  14. Grounding metallic frames, casings, and other enclosures of electric equipment.

    violationRecord 5096604
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.701 · $336.00 proposed penalty

  15. Other safeguards.

    violationRecord 5096603
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1403 · $2,503.00 proposed penalty

  16. Map of electrical system.

    violationRecord 5096602
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.508 · $209.00 proposed penalty

  17. Electric equipment; examination, testing and maintenance.

    violationRecord 5096601
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $398.00 proposed penalty

  18. Permanent splicing of trailing cables.

    violationRecord 5133222
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.604(b) · $755.00 proposed penalty

  19. Other safeguards.

    violationRecord 5133221
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1403

  20. Electric equipment; examination, testing and maintenance.

    violationRecord 5095520
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $288.00 proposed penalty

  21. Mine ventilation plan; submission and approval.

    violationRecord 5095519
    ROAD FORK #52 MINE · 4609522

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

  22. Criteria—Shelter holes.

    violationRecord 5133220
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1403-9(c)

  23. Automatic emergency-parking brakes.

    violationRecord 5133219
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.523-3(c)(2) · $151.00 proposed penalty

  24. Accumulation of combustible materials.

    violationRecord 5133218
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $697.00 proposed penalty

  25. Machinery and equipment; operation and maintenance.

    violationRecord 5133217
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1725(a) · Significant and substantial (S&S) · $2,133.00 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.