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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. Escapeways; bituminous and lignite mines.

    violationRecord 5095418
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.380(d)(1) · $366.00 proposed penalty

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

    violationRecord 5095417
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1103-4(b) · $177.00 proposed penalty

  3. Communication facilities; working sections; installation and maintenance requirements; audible or visual alarms.

    violationRecord 5095416
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1600-2(e) · $1,219.00 proposed penalty

  4. Permanent splicing of trailing cables.

    violationRecord 5096876
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.604(b) · Significant and substantial (S&S) · $4,383.00 proposed penalty

  5. Methane monitors.

    violationRecord 5096875
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $432.00 proposed penalty

  6. Roof control plan.

    violationRecord 5096874
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · Significant and substantial (S&S) · $6,540.00 proposed penalty

  7. Electric equipment; examination, testing and maintenance.

    violationRecord 5096873
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $366.00 proposed penalty

  8. Machinery

    accidentRecord 220252320030
    ROAD FORK #52 MINE · 4609522

    No dys awy frm wrk,no rstr act

    Accident narrative

    While drilling for cable bolt, reached with left hand grabbing cable bolt from tray and went to pull it off, cable bolt slipped through hand and momentum caused them to hit their hand on drill pot causing laceration.

  9. Methane monitors.

    violationRecord 5096872
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · Significant and substantial (S&S) · $3,184.00 proposed penalty

  10. Roof control plan.

    violationRecord 5096871
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · Significant and substantial (S&S) · $6,540.00 proposed penalty

  11. Spot Inspections

    inspectionRecord F017F2A
    ROAD FORK #52 MINE · 4609522

    103(i) · 5.0 on-site hours reported

  12. Mine ventilation plan; submission and approval.

    violationRecord 5091137
    ROAD FORK #52 MINE · 4609522

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

  13. Roof control plan.

    violationRecord 5091136
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $2,936.00 proposed penalty

  14. Mine ventilation plan; submission and approval.

    violationRecord 5091135
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $697.00 proposed penalty

  15. Preshift examination at fixed intervals.

    violationRecord 5090973
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.360(a)(1) · $177.00 proposed penalty

  16. Spot Inspections

    inspectionRecord F017F29
    ROAD FORK #52 MINE · 4609522

    103(i) · 5.0 on-site hours reported

  17. Machinery

    accidentRecord 220252300018
    ROAD FORK #52 MINE · 4609522

    Days away from work only

    Accident narrative

    Employee stated they were changing out the belts on the blower motor on a roof bolter, they had crawled to the edge of the machine, when the shield flipped up knocking them to the ground landing on their right arm/shoulder.

  18. Shaft, Slope or Major Construction Spot Inspection

    inspectionRecord F010DCF
    ROAD FORK #52 MINE · 4609522

    5.8 on-site hours reported

  19. Power wires and cables; insulation and protection.

    violationRecord 5098228
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.517 · Significant and substantial (S&S) · $2,312.00 proposed penalty

  20. Methane monitors.

    violationRecord 5098227
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $432.00 proposed penalty

  21. Verbal Hazard Complaint Inspections

    inspectionRecord F009F57
    ROAD FORK #52 MINE · 4609522

    17.8 on-site hours reported

  22. Spot Inspections

    inspectionRecord F017F26
    ROAD FORK #52 MINE · 4609522

    103(i) · 4.5 on-site hours reported

  23. Mine ventilation plan; submission and approval.

    violationRecord 9834076
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · Significant and substantial (S&S) · $3,736.00 proposed penalty

  24. Criteria—Haulage; general.

    violationRecord 9834075
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1403-10(i) · Significant and substantial (S&S) · $2,936.00 proposed penalty

  25. Loading and haulage equipment; installations.

    violationRecord 9834074
    ROAD FORK #52 MINE · 4609522

    30 CFR 77.1605(k) · $267.00 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.