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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. 103 (g) Written Notification Hazard Complaint Inspectio

    inspectionRecord 7048166
    ROAD FORK #52 MINE · 4609522

    4.5 on-site hours reported

  2. Spot Inspections

    inspectionRecord 7048165
    ROAD FORK #52 MINE · 4609522

    103(i) · 3.8 on-site hours reported

  3. Criteria—Track haulage roads.

    violationRecord 5096892
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1403-8(c)

  4. Permanent splicing of trailing cables.

    violationRecord 5096891
    ROAD FORK #52 MINE · 4609522

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

  5. Power wires and cables; insulation and protection.

    violationRecord 5096890
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.517 · Significant and substantial (S&S) · $4,749.00 proposed penalty

  6. Power wires and cables; insulation and protection.

    violationRecord 5096889
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.517 · Significant and substantial (S&S) · $4,749.00 proposed penalty

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

    violationRecord 5090879
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $3,736.00 proposed penalty

  8. Power wires and cables; insulation and protection.

    violationRecord 5096888
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.517 · Significant and substantial (S&S) · $4,749.00 proposed penalty

  9. Electric equipment; examination, testing and maintenance.

    violationRecord 5090878
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $336.00 proposed penalty

  10. Accumulation of combustible materials.

    violationRecord 5090877
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $818.00 proposed penalty

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

    violationRecord 5090876
    ROAD FORK #52 MINE · 4609522

    30 CFR 72.630(b) · $432.00 proposed penalty

  12. Roof control plan.

    violationRecord 5090875
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $398.00 proposed penalty

  13. Preshift examination at fixed intervals.

    violationRecord 5090990
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.360(f) · $1,431.00 proposed penalty

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

    violationRecord 5090989
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $5,574.00 proposed penalty

  15. Roof control plan.

    violationRecord 5090988
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $883.00 proposed penalty

  16. Roof control plan.

    violationRecord 9838382
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $883.00 proposed penalty

  17. Spot Inspections

    inspectionRecord 7048164
    ROAD FORK #52 MINE · 4609522

    103(i) · 5.0 on-site hours reported

  18. Condition and examination of firefighting equipment.

    violationRecord 5096881
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1100-3 · $226.00 proposed penalty

  19. Electric equipment; examination, testing and maintenance.

    violationRecord 5096880
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $1,126.00 proposed penalty

  20. Maintenance of belt conveyors and belt conveyor entries.

    violationRecord 5096879
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1731(a) · $177.00 proposed penalty

  21. Accumulation of combustible materials.

    violationRecord 5096878
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $818.00 proposed penalty

  22. Spot Inspections

    inspectionRecord F01AA92
    ROAD FORK #52 MINE · 4609522

    103(i) · 7.0 on-site hours reported

  23. Welding, cutting, or soldering with arc or flame underground.

    violationRecord 5091632
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1106 · $432.00 proposed penalty

  24. Methane monitors.

    violationRecord 5091631
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $398.00 proposed penalty

  25. Methane monitors.

    violationRecord 5096877
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $432.00 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.