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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 – 2026-10-31Database snapshot · 2026-10-31

Safety activity

  1. Mechanical equipment guards.

    violationRecord 5033113
    Black Thunder · 4800977

    30 CFR 77.400(a) · $151.00 proposed penalty

  2. Protection of trailing cables.

    violationRecord 5033112
    Black Thunder · 4800977

    30 CFR 77.604 · $151.00 proposed penalty

  3. Regular Safety and Health Inspection

    inspectionRecord F003300
    Black Thunder · 4800977

    324.3 on-site hours reported

  4. Handling of materials

    accidentRecord 220252720027
    Black Thunder · 4800977

    No dys awy frm wrk,no rstr act

    Accident narrative

    Employee was removing a metal cover plate which contacted their right shin causing a hairline fracture

  5. Fire

    accidentRecord 220252660022
    Black Thunder · 4800977

    Accident only

    Accident narrative

    A coal fire was discovered in the south pit that could not be extinguished within 30 minutes.

  6. Inspection and cover plates.

    violationRecord 5031850
    Black Thunder · 4800977

    30 CFR 77.512 · $193.00 proposed penalty

  7. Identification of circuit breakers and disconnecting switches.

    violationRecord 9732347
    Black Thunder · 4800977

    30 CFR 77.809 · $193.00 proposed penalty

  8. Fire

    accidentRecord 220252470017
    Black Thunder · 4800977

    Accident only

    Accident narrative

    A coal fire was discovered in the South Pit that could not be extinguished within 30 minutes

  9. Machinery and equipment; operation and maintenance.

    violationRecord 5033107
    Black Thunder · 4800977

    30 CFR 77.404(a) · $151.00 proposed penalty

  10. Accumulations of combustible materials.

    violationRecord 9732522
    Black Thunder · 4800977

    30 CFR 77.1104 · $366.00 proposed penalty

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

    violationRecord 9732491
    Black Thunder · 4800977

    30 CFR 77.502 · $151.00 proposed penalty

  12. Loading and haulage equipment; installations.

    violationRecord 9731188
    Black Thunder · 4800977

    30 CFR 77.1605(k) · $288.00 proposed penalty

  13. Temporary, portable containers.

    violationRecord 9731187
    Black Thunder · 4800977

    30 CFR 47.44(b) · $151.00 proposed penalty

  14. Loading and haulage equipment; installations.

    violationRecord 5033103
    Black Thunder · 4800977

    30 CFR 77.1605(b) · Significant and substantial (S&S) · $366.00 proposed penalty

  15. Electric equipment; frequency of examination and testing.

    violationRecord 5033102
    Black Thunder · 4800977

    30 CFR 77.502-2 · $151.00 proposed penalty

  16. Installation of high-voltage transmission cables.

    violationRecord 9732487
    Black Thunder · 4800977

    30 CFR 77.807 · $193.00 proposed penalty

  17. Protection of trailing cables.

    violationRecord 9732486
    Black Thunder · 4800977

    30 CFR 77.604 · $151.00 proposed penalty

  18. Travelways at surface installations.

    violationRecord 9732485
    Black Thunder · 4800977

    30 CFR 77.205(e) · $151.00 proposed penalty

  19. Switchboards; passageways and clearance.

    violationRecord 9732484
    Black Thunder · 4800977

    30 CFR 77.514 · $151.00 proposed penalty

  20. Loading and haulage equipment; installations.

    violationRecord 5034109
    Black Thunder · 4800977

    30 CFR 77.1605(l) · Significant and substantial (S&S) · $1,431.00 proposed penalty

  21. Powered haulage

    accidentRecord 220252160007
    Black Thunder · 4800977

    No dys awy frm wrk,no rstr act

    Accident narrative

    Employee slid out of seat on bus ride out to EE's equipment. When EE slid out of EE's seat EE hit EE's left side (ribs) on a lunchbox. Positive X-ray showed fractured ribs. Was released to work and returned EE's next scheduled shift.

  22. Loading and haulage equipment; installations.

    violationRecord 9732514
    Coal Creek Mine · 4801215

    30 CFR 77.1605(d) · $177.00 proposed penalty

  23. Loading and haulage equipment; inspection and maintenance.

    violationRecord 9732513
    Coal Creek Mine · 4801215

    30 CFR 77.1606(c) · $177.00 proposed penalty

  24. Protective clothing; requirements.

    violationRecord 9732568
    Black Thunder · 4800977

    30 CFR 77.1710(g) · Significant and substantial (S&S) · $288.00 proposed penalty

  25. Travelways at surface installations.

    violationRecord 9732567
    Black Thunder · 4800977

    30 CFR 77.205(a) · Significant and substantial (S&S) · $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.