Search

← Mammoth Coal

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. Cable fittings; suitability.

    violationRecord 9838346
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.515 · $151.00 proposed penalty

  2. Methane monitors.

    violationRecord 5090260
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $366.00 proposed penalty

  3. Roof control plan.

    violationRecord 5090259
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · Significant and substantial (S&S) · $1,550.00 proposed penalty

  4. Escapeways; bituminous and lignite mines.

    violationRecord 5090258
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.380(d)(1) · $4,383.00 proposed penalty

  5. Spot Inspections

    inspectionRecord F0107D3
    ROAD FORK #52 MINE · 4609522

    103(i) · 4.5 on-site hours reported

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

    violationRecord 5090257
    ROAD FORK #52 MINE · 4609522

    30 CFR 72.630(b) · $366.00 proposed penalty

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

    violationRecord 5090256
    ROAD FORK #52 MINE · 4609522

    30 CFR 72.630(b) · $366.00 proposed penalty

  8. Methane monitors.

    violationRecord 5090255
    ROAD FORK #52 MINE · 4609522

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

  9. Methane monitors.

    violationRecord 5090254
    ROAD FORK #52 MINE · 4609522

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

  10. Verbal Hazard Complaint Inspections

    inspectionRecord 7048929
    ROAD FORK #52 MINE · 4609522

    5.0 on-site hours reported

  11. Automatic fire sensor and warning device systems; installation; minimum requirements.

    violationRecord 9839858
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1103-4(b) · $151.00 proposed penalty

  12. Accumulation of combustible materials.

    violationRecord 9839857
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $288.00 proposed penalty

  13. Handling of materials

    accidentRecord 220251110023
    ROAD FORK #52 MINE · 4609522

    No dys awy frm wrk,no rstr act

    Accident narrative

    EE stated they were putting up the outside bolt, EE was trying to straighten the bolt when they slipped and fell into the bolt and pie pan. EE went was seen at Hospital and received 5 sutures and made an appointment with a dentist.

  14. Identification of circuit breakers.

    violationRecord 9839043
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.904 · $1,126.00 proposed penalty

  15. Belt air course ventilation.

    violationRecord 9839042
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.350(a)(2) · $336.00 proposed penalty

  16. Violation — cited standard not reported

    violationRecord 9839041
    ROAD FORK #52 MINE · 4609522

    $1,355.00 proposed penalty

  17. Preshift examination at fixed intervals.

    violationRecord 9839040
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.360(f) · $151.00 proposed penalty

  18. Accumulation of combustible materials.

    violationRecord 9839039
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $288.00 proposed penalty

  19. Escapeways; bituminous and lignite mines.

    violationRecord 9839038
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.380(d)(7)(vi) · $151.00 proposed penalty

  20. Accumulation of combustible materials.

    violationRecord 5090253
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $288.00 proposed penalty

  21. Accumulation of combustible materials.

    violationRecord 5090252
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $288.00 proposed penalty

  22. Power wires and cables; insulation and protection.

    violationRecord 5090251
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.517 · $4,383.00 proposed penalty

  23. Mine ventilation plan; submission and approval.

    violationRecord 5090250
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $4,749.00 proposed penalty

  24. Clamping of trailing cables to equipment.

    violationRecord 9838344
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.605 · $151.00 proposed penalty

  25. Permissible electric face equipment; maintenance.

    violationRecord 9838343
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $226.00 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.