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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. Quantity and location of firefighting equipment.

    violationRecord 9591665
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1100-2(f) · $151.00 proposed penalty

  2. Mine ventilation plan; submission and approval.

    violationRecord 9591664
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · Significant and substantial (S&S) · $7,084.00 proposed penalty

  3. Roof control plan.

    violationRecord 9839007
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · Significant and substantial (S&S) · $2,503.00 proposed penalty

  4. 103 (g) Written Notification Hazard Complaint Inspectio

    inspectionRecord F01FF0B
    ROAD FORK #52 MINE · 4609522

    11.5 on-site hours reported

  5. Spot Inspections

    inspectionRecord 7048155
    ROAD FORK #52 MINE · 4609522

    103(i) · 6.0 on-site hours reported

  6. Automatic emergency-parking brakes.

    violationRecord 9839002
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.523-3(c)(2) · $288.00 proposed penalty

  7. Power wires and cables; insulation and protection.

    violationRecord 9839001
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.517 · $226.00 proposed penalty

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

    violationRecord 9839000
    ROAD FORK #52 MINE · 4609522

    30 CFR 72.630(b) · $267.00 proposed penalty

  9. Spot Inspections

    inspectionRecord F00197C
    ROAD FORK #52 MINE · 4609522

    103(i) · 5.5 on-site hours reported

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

    violationRecord 9836981
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $959.00 proposed penalty

  11. Spot Inspections

    inspectionRecord 7048154
    ROAD FORK #52 MINE · 4609522

    103(i) · 5.3 on-site hours reported

  12. Mine ventilation plan; submission and approval.

    violationRecord 9837840
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $432.00 proposed penalty

  13. Inspection of fire suppression devices.

    violationRecord 9836899
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1107-16(b) · $336.00 proposed penalty

  14. Verbal Hazard Complaint Inspections

    inspectionRecord F00197B
    ROAD FORK #52 MINE · 4609522

    9.0 on-site hours reported

  15. Belt air course ventilation.

    violationRecord 9836979
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.350(a)(2) · $151.00 proposed penalty

  16. On-shift examination.

    violationRecord 9836980
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.362(d)(1)(ii) · Significant and substantial (S&S) · $504.00 proposed penalty

  17. Spot Inspections

    inspectionRecord F01D4B1
    ROAD FORK #52 MINE · 4609522

    103(i) · 4.5 on-site hours reported

  18. Accumulation of combustible materials.

    violationRecord 9591663
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $313.00 proposed penalty

  19. Fire suppression devices; approved components; installation requirements.

    violationRecord 9591662
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1107-3(d) · $151.00 proposed penalty

  20. Installation of electric equipment and conductors; permissibility.

    violationRecord 9591661
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1002(a) · $151.00 proposed penalty

  21. Belt air course ventilation.

    violationRecord 9591660
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.350(a)(2) · $366.00 proposed penalty

  22. Mine ventilation plan; submission and approval.

    violationRecord 9591659
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $818.00 proposed penalty

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

    violationRecord 9837839
    ROAD FORK #52 MINE · 4609522

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

  24. Quantity and location of firefighting equipment.

    violationRecord 9591658
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1100-2(f) · $151.00 proposed penalty

  25. Fire-resistant hydraulic fluids and fire suppression devices on underground equipment.

    violationRecord 9591657
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1107-1(b) · $151.00 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.