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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. Methane monitors.

    violationRecord 5131401
    ROAD FORK #52 MINE · 4609522

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

  2. Ventilation controls.

    violationRecord 5131400
    ROAD FORK #52 MINE · 4609522

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

  3. Maintenance of belt conveyors and belt conveyor entries.

    violationRecord 5133243
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1731(b) · Significant and substantial (S&S) · $1,679.00 proposed penalty

  4. Belt air course ventilation.

    violationRecord 5133242
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.350(a)(2) · Significant and substantial (S&S)

  5. Mine ventilation plan; submission and approval.

    violationRecord 5094772
    ROAD FORK #52 MINE · 4609522

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

  6. Mine ventilation plan; submission and approval.

    violationRecord 5094771
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $549.00 proposed penalty

  7. Permissible electric face equipment; maintenance.

    violationRecord 5095538
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $245.00 proposed penalty

  8. Mine ventilation plan; submission and approval.

    violationRecord 5095537
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $549.00 proposed penalty

  9. Water spray devices; capacity; water supply; minimum requirements.

    violationRecord 5133240
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1107-7(b) · $151.00 proposed penalty

  10. Electric equipment; examination, testing and maintenance.

    violationRecord 5095536
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $336.00 proposed penalty

  11. Cable fittings; suitability.

    violationRecord 5095535
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.515 · $177.00 proposed penalty

  12. Installation of electric equipment and conductors; permissibility.

    violationRecord 5133239
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1002(a) · $432.00 proposed penalty

  13. Spot Inspections

    inspectionRecord F005E80
    ROAD FORK #52 MINE · 4609522

    103(i) · 5.5 on-site hours reported

  14. Condition and examination of firefighting equipment.

    violationRecord 5095534
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1100-3 · $209.00 proposed penalty

  15. Electric equipment; examination, testing and maintenance.

    violationRecord 5095533
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $336.00 proposed penalty

  16. Accumulation of combustible materials.

    violationRecord 5095532
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $883.00 proposed penalty

  17. Electric equipment; examination, testing and maintenance.

    violationRecord 5095531
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $336.00 proposed penalty

  18. Spot Inspections

    inspectionRecord F005E7F
    ROAD FORK #52 MINE · 4609522

    103(i) · 6.0 on-site hours reported

  19. Self-rescue devices; inspection, testing, maintenance, repair, and recordkeeping.

    violationRecord 5092947
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1714-3(a) · $165.00 proposed penalty

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

    violationRecord 5092946
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $11,450.00 proposed penalty

  21. Condition and examination of firefighting equipment.

    violationRecord 5096613
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1100-3 · $398.00 proposed penalty

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

    violationRecord 5096612
    ROAD FORK #52 MINE · 4609522

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

  23. Automatic emergency-parking brakes.

    violationRecord 5096611
    ROAD FORK #52 MINE · 4609522

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

  24. Installation of electric equipment and conductors; permissibility.

    violationRecord 5096610
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1002(a) · $336.00 proposed penalty

  25. Roof control plan.

    violationRecord 5096609
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · Significant and substantial (S&S) · $3,736.00 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.