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Thunder Basin Coal Company LLC safety activity

MSHA violations, accident reports and inspections across the current mine portfolio.

2025-01-01 – 2026-10-28Database snapshot · 2026-10-28

Safety activity

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

    violationRecord 5038966
    Black Thunder · 4800977

    30 CFR 77.502

  2. Identification of circuit breakers and disconnecting switches.

    violationRecord 5038965
    Black Thunder · 4800977

    30 CFR 77.809

  3. Machinery and equipment; operation and maintenance.

    violationRecord 5034583
    Black Thunder · 4800977

    30 CFR 77.404(a)

  4. Clamping of trailing cables to equipment.

    violationRecord 5038964
    Black Thunder · 4800977

    30 CFR 77.603

  5. Electric equipment; frequency of examination and testing.

    violationRecord 5034309
    Black Thunder · 4800977

    30 CFR 77.502-2

  6. Mechanical equipment guards.

    violationRecord 5034582
    Black Thunder · 4800977

    30 CFR 77.400(a)

  7. Loading and haulage equipment; inspection and maintenance.

    violationRecord 5033581
    Black Thunder · 4800977

    30 CFR 77.1606(c)

  8. Cable fittings; suitability.

    violationRecord 5034575
    Black Thunder · 4800977

    30 CFR 77.505

  9. Loading and haulage equipment; inspection and maintenance.

    violationRecord 5034223
    Black Thunder · 4800977

    30 CFR 77.1606(c)

  10. Regular Safety and Health Inspection

    inspectionRecord F03EA02
    Black Thunder · 4800977

    81.3 on-site hours reported

  11. Loading and haulage equipment; installations.

    violationRecord 5034222
    Black Thunder · 4800977

    30 CFR 77.1605(l) · Significant and substantial (S&S)

  12. Permanent splicing of trailing cables.

    violationRecord 5034221
    Black Thunder · 4800977

    30 CFR 77.602(a) · Significant and substantial (S&S)

  13. Highwalls, pits and spoil banks; plans.

    violationRecord 5033580
    Black Thunder · 4800977

    30 CFR 77.1000

  14. Handling of materials

    accidentRecord 220262600009
    Black Thunder · 4800977

    No dys awy frm wrk,no rstr act

    Accident narrative

    the incident occurred when an employee was aligning and installing a 120Lb truck bed pivot pin into the left rear truck pivot bore. the pivot pin slipped during manual positioning and the employees' finger was smashed between the pin and the bore opening. the injury resulted in a near amputation of the right pinky fingertip near the first knuckle

  15. Verbal Hazard Complaint Inspections

    inspectionRecord F010EEF
    Black Thunder · 4800977

    0.0 on-site hours reported

  16. Slip or fall of person

    accidentRecord 220262310001
    Black Thunder · 4800977

    No dys awy frm wrk,no rstr act

    Accident narrative

    Employee was exiting the pit bus at the beginning of shift when they slipped causing a small verifiable fracture to the fibula. Employee was able to return to work.

  17. Fire

    accidentRecord 220261620003
    Black Thunder · 4800977

    Accident only

    Accident narrative

    A grass fire started at the rail road tracks and spread to the mine property. The fire could not be put out in 15 minutes.

  18. Examination and maintenance of firefighting equipment.

    violationRecord 5034214
    Black Thunder · 4800977

    30 CFR 77.1110 · $432.00 proposed penalty

  19. Mechanical equipment guards.

    violationRecord 5033779
    Black Thunder · 4800977

    30 CFR 77.400(a) · $366.00 proposed penalty

  20. Daily inspection of surface coal mine; certified person; reports of inspection.

    violationRecord 5034213
    Black Thunder · 4800977

    30 CFR 77.1713(d)(1) · $504.00 proposed penalty

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

    violationRecord 5033778
    Black Thunder · 4800977

    30 CFR 77.502 · $465.00 proposed penalty

  22. Slip or fall of person

    accidentRecord 220261620004
    Black Thunder · 4800977

    Days away from work only

    Accident narrative

    Employee was walking down the boarding ladder of haul truck when EE slipped and injured EE's arm trying to catch self. Dr. appointment on 06/03/26 confirmed bicep tear.

  23. Mobile equipment; automatic warning devices.

    violationRecord 5034211
    Black Thunder · 4800977

    30 CFR 77.410(c) · $151.00 proposed penalty

  24. Examination and maintenance of firefighting equipment.

    violationRecord 5034210
    Black Thunder · 4800977

    30 CFR 77.1110 · $465.00 proposed penalty

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

    violationRecord 5034209
    Black Thunder · 4800977

    30 CFR 77.502 · $465.00 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.