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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. Accumulation of combustible materials.

    violationRecord 5133255
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $818.00 proposed penalty

  2. Electric equipment; examination, testing, and maintenance.

    violationRecord 5133254
    ROAD FORK #52 MINE · 4609522

    30 CFR 77.502 · $1,126.00 proposed penalty

  3. Surface installations; general.

    violationRecord 5133253
    ROAD FORK #52 MINE · 4609522

    30 CFR 77.200 · $336.00 proposed penalty

  4. Spot Inspections

    inspectionRecord F02EC80
    ROAD FORK #52 MINE · 4609522

    103(i) · 17.5 on-site hours reported

  5. Air quality detectors and measurement devices.

    violationRecord 5131228
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.320(c) · $165.00 proposed penalty

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

    violationRecord 5131227
    ROAD FORK #52 MINE · 4609522

    30 CFR 72.630(b) · $313.00 proposed penalty

  7. Maintenance of belt conveyors and belt conveyor entries.

    violationRecord 5133252
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1731(a) · $151.00 proposed penalty

  8. Automatic fire sensor and warning device systems; examination and test requirements.

    violationRecord 5133251
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1103-8(c) · $151.00 proposed penalty

  9. Mine ventilation plan; submission and approval.

    violationRecord 5133250
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · Significant and substantial (S&S) · $2,936.00 proposed penalty

  10. Permanent splicing of trailing cables.

    violationRecord 5133249
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.604(b) · Significant and substantial (S&S) · $3,736.00 proposed penalty

  11. Permissible electric face equipment; maintenance.

    violationRecord 5133248
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $549.00 proposed penalty

  12. Mine ventilation plan; submission and approval.

    violationRecord 5131403
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $366.00 proposed penalty

  13. Mine ventilation plan; submission and approval.

    violationRecord 5091194
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $226.00 proposed penalty

  14. Spot Inspections

    inspectionRecord F005E82
    ROAD FORK #52 MINE · 4609522

    103(i) · 6.0 on-site hours reported

  15. Inspection of fire suppression devices.

    violationRecord 5097280
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1107-16(b) · $165.00 proposed penalty

  16. Approval of other fire suppression devices.

    violationRecord 5097279
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1107-13 · $336.00 proposed penalty

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

    violationRecord 5133247
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1714-3(a) · $336.00 proposed penalty

  18. Methane monitors.

    violationRecord 5133246
    ROAD FORK #52 MINE · 4609522

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

  19. Permissible electric face equipment; maintenance.

    violationRecord 5133245
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $592.00 proposed penalty

  20. Methane monitors.

    violationRecord 5133244
    ROAD FORK #52 MINE · 4609522

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

  21. Verbal Hazard Complaint Inspections

    inspectionRecord F007654
    ROAD FORK #52 MINE · 4609522

    8.5 on-site hours reported

  22. Permissible exposure level.

    violationRecord 5132808
    ROAD FORK #52 MINE · 4609522

    30 CFR 62.130(a) · $226.00 proposed penalty

  23. Spot Inspections

    inspectionRecord F02EE06
    ROAD FORK #52 MINE · 4609522

    103(i) · 11.0 on-site hours reported

  24. Verbal Hazard Complaint Inspections

    inspectionRecord F011547
    ROAD FORK #52 MINE · 4609522

    5.0 on-site hours reported

  25. Methane monitors.

    violationRecord 5131402
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.342(a)(4) · $313.00 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.