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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 5094781
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $313.00 proposed penalty

  2. Methane monitors.

    violationRecord 5097288
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(c)(2) · $165.00 proposed penalty

  3. Permissible electric face equipment; maintenance.

    violationRecord 5096631
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $549.00 proposed penalty

  4. Permissible electric face equipment; maintenance.

    violationRecord 5096629
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $549.00 proposed penalty

  5. Escapeways; bituminous and lignite mines.

    violationRecord 5096627
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.380(d)(1) · Significant and substantial (S&S) · $2,503.00 proposed penalty

  6. Other safeguards.

    violationRecord 5095550
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1403 · Significant and substantial (S&S) · $2,503.00 proposed penalty

  7. Electric equipment; examination, testing and maintenance.

    violationRecord 5133260
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $288.00 proposed penalty

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

    violationRecord 5133259
    ROAD FORK #52 MINE · 4609522

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

  9. Methane monitors.

    violationRecord 5133258
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $313.00 proposed penalty

  10. Mine ventilation plan; submission and approval.

    violationRecord 5133257
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · Significant and substantial (S&S) · $6,037.00 proposed penalty

  11. Verbal Hazard Complaint Inspections

    inspectionRecord F011548
    ROAD FORK #52 MINE · 4609522

    7.0 on-site hours reported

  12. Spot Inspections

    inspectionRecord F005E83
    ROAD FORK #52 MINE · 4609522

    103(i) · 6.8 on-site hours reported

  13. Violation — cited standard not reported

    violationRecord 5097287
    ROAD FORK #52 MINE · 4609522

    $480.00 proposed penalty

  14. Condition and examination of firefighting equipment.

    violationRecord 5097286
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1100-3 · $398.00 proposed penalty

  15. Condition and examination of firefighting equipment.

    violationRecord 5097285
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1100-3 · $398.00 proposed penalty

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

    violationRecord 5094780
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $2,312.00 proposed penalty

  17. Capacity of fire suppression devices; location and direction of nozzles.

    violationRecord 5096626
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1107-6(a)(3) · $151.00 proposed penalty

  18. Additional self-contained self-rescuers (SCSRs).

    violationRecord 5096625
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1714-4(e) · $1,126.00 proposed penalty

  19. Roof control plan.

    violationRecord 5096624
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $697.00 proposed penalty

  20. Accumulation of combustible materials.

    violationRecord 5096623
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $755.00 proposed penalty

  21. Permanent splicing of trailing cables.

    violationRecord 5096622
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.604(b) · Significant and substantial (S&S) · $8,315.00 proposed penalty

  22. Installation of electric equipment and conductors; permissibility.

    violationRecord 5096621
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1002(a) · $336.00 proposed penalty

  23. Other safeguards.

    violationRecord 5096620
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1403 · Significant and substantial (S&S) · $5,574.00 proposed penalty

  24. Roof control plan.

    violationRecord 5092536
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $697.00 proposed penalty

  25. Electric equipment; examination, testing and maintenance.

    violationRecord 5133256
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · $288.00 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.