Thunder Basin Coal Company LLC safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Electric equipment; examination, testing, and maintenance.
Black Thunder · 480097730 CFR 77.502 · $288.00 proposed penalty
Escape and evacuation; plan.
Black Thunder · 480097730 CFR 77.1101(c) · $151.00 proposed penalty
Electric equipment; examination, testing, and maintenance.
Black Thunder · 480097730 CFR 77.502 · $151.00 proposed penalty
Electric equipment; examination, testing, and maintenance.
Black Thunder · 480097730 CFR 77.502 · $313.00 proposed penalty
Flammable liquids; storage.
Black Thunder · 480097730 CFR 77.1103(a) · $151.00 proposed penalty
Machinery and equipment; operation and maintenance.
Black Thunder · 480097730 CFR 77.404(a) · $151.00 proposed penalty
Machinery and equipment; operation and maintenance.
Black Thunder · 480097730 CFR 77.404(a) · $151.00 proposed penalty
Examination and maintenance of firefighting equipment.
Black Thunder · 480097730 CFR 77.1110 · $151.00 proposed penalty
Machinery and equipment; operation and maintenance.
Black Thunder · 480097730 CFR 77.404(a) · $151.00 proposed penalty
Protective clothing; requirements.
Black Thunder · 480097730 CFR 77.1710(a) · Significant and substantial (S&S) · $177.00 proposed penalty
Welding operations.
Black Thunder · 480097730 CFR 77.408 · $151.00 proposed penalty
Loading and haulage equipment; installations.
Black Thunder · 480097730 CFR 77.1605(b) · $151.00 proposed penalty
Warning signs; smoking and open flame.
Black Thunder · 480097730 CFR 77.1102 · $193.00 proposed penalty
Loading and haulage; general.
Black Thunder · 480097730 CFR 77.1600(b) · $151.00 proposed penalty
Loading and haulage equipment; operation.
Black Thunder · 480097730 CFR 77.1607(aa) · $193.00 proposed penalty
Daily inspection of surface coal mine; certified person; reports of inspection.
Black Thunder · 480097730 CFR 77.1713(c) · $151.00 proposed penalty
Installation of high-voltage transmission cables.
Black Thunder · 480097730 CFR 77.807 · $151.00 proposed penalty
Protection of trailing cables.
Black Thunder · 480097730 CFR 77.604 · $151.00 proposed penalty
Flammable liquids; storage.
Black Thunder · 480097730 CFR 77.1103(d) · $193.00 proposed penalty
Cable fittings; suitability.
Black Thunder · 480097730 CFR 77.505 · $151.00 proposed penalty
Flammable liquids; storage.
Black Thunder · 480097730 CFR 77.1103(a) · $151.00 proposed penalty
Drilling; general.
Black Thunder · 480097730 CFR 77.1007(b) · $151.00 proposed penalty
Accumulations of combustible materials.
Black Thunder · 480097730 CFR 77.1104 · $366.00 proposed penalty
Accumulations of combustible materials.
Black Thunder · 480097730 CFR 77.1104 · $366.00 proposed penalty
Installation of high-voltage transmission cables.
Black Thunder · 480097730 CFR 77.807 · $151.00 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.