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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. Ventilation controls.

    violationRecord 5094509
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.333(d)(3) · $151.00 proposed penalty

  2. Accumulation of combustible materials.

    violationRecord 5132596
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $755.00 proposed penalty

  3. Maintenance of belt conveyors and belt conveyor entries.

    violationRecord 5132595
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1731(a) · $151.00 proposed penalty

  4. Mine ventilation plan; submission and approval.

    violationRecord 5132594
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · Significant and substantial (S&S) · $2,503.00 proposed penalty

  5. Dust disease of lungs

    accidentRecord 220262230005
    ROAD FORK #52 MINE · 4609522

    Occupatnal illness not deg 1-6

    Accident narrative

    The miner has been diagnosed with occupational pneumoconiosis.

  6. Dust disease of lungs

    accidentRecord 220262230007
    ROAD FORK #52 MINE · 4609522

    Occupatnal illness not deg 1-6

    Accident narrative

    The miner has been diagnosed with occupational pneumoconiosis.

  7. Verbal Hazard Complaint Inspections

    inspectionRecord F011550
    ROAD FORK #52 MINE · 4609522

    27.3 on-site hours reported

  8. Travelways at surface installations.

    violationRecord 5026761
    Mammoth Coal Processing Pl & Riv Tipple · 4603317

    30 CFR 77.205(b) · $151.00 proposed penalty

  9. Mechanical equipment guards.

    violationRecord 5133298
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1722(a) · Significant and substantial (S&S) · $2,712.00 proposed penalty

  10. Methane monitors.

    violationRecord 5133297
    ROAD FORK #52 MINE · 4609522

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

  11. Methane monitors.

    violationRecord 5132593
    ROAD FORK #52 MINE · 4609522

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

  12. Methane monitors.

    violationRecord 5097996
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $755.00 proposed penalty

  13. Air quality detectors and measurement devices.

    violationRecord 5097995
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.320(a) · $336.00 proposed penalty

  14. Accumulation of combustible materials.

    violationRecord 5132592
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $818.00 proposed penalty

  15. Electric equipment; examination, testing and maintenance.

    violationRecord 5132591
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $959.00 proposed penalty

  16. Permissible electric face equipment; maintenance.

    violationRecord 5132590
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $959.00 proposed penalty

  17. Accumulation of combustible materials.

    violationRecord 5132564
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $755.00 proposed penalty

  18. Insulating mats at power switches.

    violationRecord 5096683
    ROAD FORK #52 MINE · 4609522

    30 CFR 77.513 · $151.00 proposed penalty

  19. Illumination.

    violationRecord 5096682
    ROAD FORK #52 MINE · 4609522

    30 CFR 77.207 · $151.00 proposed penalty

  20. Spot Inspections

    inspectionRecord F036045
    ROAD FORK #52 MINE · 4609522

    103(i) · 4.5 on-site hours reported

  21. Minimum requirements; fire suppression materials and location; maintenance of entries and crosscuts; access doors; communications; fire crews; high-expansion foam devices.

    violationRecord 5132589
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1103-9(a) · $336.00 proposed penalty

  22. Rock dusting.

    violationRecord 5132588
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.402 · $336.00 proposed penalty

  23. Electric equipment; examination, testing and maintenance.

    violationRecord 5132587
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $432.00 proposed penalty

  24. Accumulation of combustible materials.

    violationRecord 5132586
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $818.00 proposed penalty

  25. Accumulation of combustible materials.

    violationRecord 5096681
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $2,503.00 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.