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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. Accumulation of combustible materials.

    violationRecord 9838355
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $642.00 proposed penalty

  2. Canopies or cabs; self-propelled diesel-powered and electric face equipment; installation requirements.

    violationRecord 9838354
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1710-1(e) · $151.00 proposed penalty

  3. Accumulation of combustible materials.

    violationRecord 9838353
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $642.00 proposed penalty

  4. Mechanical equipment guards.

    violationRecord 9838352
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1722(a) · Significant and substantial (S&S) · $2,503.00 proposed penalty

  5. Machinery and equipment; operation and maintenance.

    violationRecord 9838351
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1725(a) · Significant and substantial (S&S) · $1,679.00 proposed penalty

  6. Mechanical equipment guards.

    violationRecord 5090267
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1722(c) · $504.00 proposed penalty

  7. Accumulation of combustible materials.

    violationRecord 5090266
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $288.00 proposed penalty

  8. Machinery and equipment; operation and maintenance.

    violationRecord 9838350
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1725(a) · Significant and substantial (S&S) · $1,679.00 proposed penalty

  9. Permissible electric face equipment; maintenance.

    violationRecord 9838349
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $226.00 proposed penalty

  10. Automatic emergency-parking brakes.

    violationRecord 9838348
    ROAD FORK #52 MINE · 4609522

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

  11. Accumulation of combustible materials.

    violationRecord 9838347
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $642.00 proposed penalty

  12. Maintenance of belt conveyors and belt conveyor entries.

    violationRecord 5090265
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1731(a) · $151.00 proposed penalty

  13. Power wires and cables; insulation and protection.

    violationRecord 5090264
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.517 · Significant and substantial (S&S) · $4,383.00 proposed penalty

  14. Machinery and equipment; operation and maintenance.

    violationRecord 5090263
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1725(a) · Significant and substantial (S&S) · $818.00 proposed penalty

  15. Mine ventilation plan; submission and approval.

    violationRecord 5090262
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $2,712.00 proposed penalty

  16. Permanent splicing of trailing cables.

    violationRecord 5090261
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.604(b) · $3,736.00 proposed penalty

  17. Ventilation controls.

    violationRecord 9591682
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.333(b)(5) · Significant and substantial (S&S) · $755.00 proposed penalty

  18. Mine ventilation plan; submission and approval.

    violationRecord 9591681
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $366.00 proposed penalty

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

    violationRecord 9839056
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $1,320.00 proposed penalty

  20. Roof control plan.

    violationRecord 9839055
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $313.00 proposed penalty

  21. Permanent splicing of trailing cables.

    violationRecord 9839054
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.604(b) · $755.00 proposed penalty

  22. Roof control plan.

    violationRecord 9839053
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $1,037.00 proposed penalty

  23. Ventilation controls.

    violationRecord 9591680
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.333(b)(2) · $336.00 proposed penalty

  24. Dust disease of lungs

    accidentRecord 220251150043
    ROAD FORK #52 MINE · 4609522

    Occupatnal illness not deg 1-6

    Accident narrative

    Employee was diagnosed with pneumoconiosis.

  25. Spot Inspections

    inspectionRecord F0107D4
    ROAD FORK #52 MINE · 4609522

    103(i) · 7.0 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.