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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. Additional self-contained self-rescuers (SCSRs).

    violationRecord 9839810
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1714-4(f) · $1,037.00 proposed penalty

  2. Cable fittings; suitability.

    violationRecord 9839021
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.515 · $151.00 proposed penalty

  3. Electric equipment; examination, testing and maintenance.

    violationRecord 9839020
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $288.00 proposed penalty

  4. Escapeway maps.

    violationRecord 9839019
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1505(a) · $336.00 proposed penalty

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

    violationRecord 9568524
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $1,126.00 proposed penalty

  6. Loading and haulage equipment; inspection and maintenance.

    violationRecord 9839018
    ROAD FORK #52 MINE · 4609522

    30 CFR 77.1606(c) · $504.00 proposed penalty

  7. Spot Inspections

    inspectionRecord 7049210
    ROAD FORK #52 MINE · 4609522

    103(i) · 7.0 on-site hours reported

  8. Machinery and equipment; operation and maintenance.

    violationRecord 9834058
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1725(a) · Significant and substantial (S&S) · $1,219.00 proposed penalty

  9. Mine ventilation plan; submission and approval.

    violationRecord 9834057
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · Significant and substantial (S&S) · $9,757.00 proposed penalty

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

    violationRecord 9839808
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.601-1 · $151.00 proposed penalty

  11. Self-rescue devices; use and location requirements.

    violationRecord 9833954
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1714-2(b) · $193.00 proposed penalty

  12. Mine ventilation plan; submission and approval.

    violationRecord 9833953
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $4,047.00 proposed penalty

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

    violationRecord 9833952
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $1,126.00 proposed penalty

  14. Spot Inspections

    inspectionRecord 7049209
    ROAD FORK #52 MINE · 4609522

    103(i) · 6.0 on-site hours reported

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

    violationRecord 9834056
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $1,679.00 proposed penalty

  16. Methane monitors.

    violationRecord 9834055
    ROAD FORK #52 MINE · 4609522

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

  17. Mine ventilation plan; submission and approval.

    violationRecord 9834054
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $336.00 proposed penalty

  18. Mine ventilation plan; submission and approval.

    violationRecord 9834053
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $336.00 proposed penalty

  19. Accumulation of combustible materials.

    violationRecord 9839017
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $642.00 proposed penalty

  20. Air quality.

    violationRecord 9839016
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.321(a)(1) · $504.00 proposed penalty

  21. Verbal Hazard Complaint Inspections

    inspectionRecord 6321848
    ROAD FORK #52 MINE · 4609522

    36.0 on-site hours reported

  22. Roof control plan.

    violationRecord 9839015
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $2,503.00 proposed penalty

  23. Mine ventilation plan; submission and approval.

    violationRecord 9839014
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $755.00 proposed penalty

  24. Mine ventilation plan; submission and approval.

    violationRecord 9838888
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · Significant and substantial (S&S) · $2,712.00 proposed penalty

  25. Quantity and location of firefighting equipment.

    violationRecord 9838258
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1100-2(e) · $336.00 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.