Thunder Basin Coal Company LLC safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Accumulations of combustible materials.
Black Thunder · 480097730 CFR 77.1104 · $366.00 proposed penalty
Electrical connections or splices; suitability.
Black Thunder · 480097730 CFR 77.504 · $151.00 proposed penalty
Protective clothing; requirements.
Black Thunder · 480097730 CFR 77.1710(g) · Significant and substantial (S&S) · $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
Inspection and cover plates.
Black Thunder · 480097730 CFR 77.512 · $151.00 proposed penalty
Temporary, portable containers.
Black Thunder · 480097730 CFR 47.44(b) · $151.00 proposed penalty
Storage of materials.
Black Thunder · 480097730 CFR 77.208(d) · $193.00 proposed penalty
Requirement for container labels.
Coal Creek Mine · 480121530 CFR 47.41(a)(1) · $177.00 proposed penalty
Loading and haulage equipment; installations.
Coal Creek Mine · 480121530 CFR 77.1605(d) · $151.00 proposed penalty
Regular Safety and Health Inspection
Coal Creek Mine · 480121571.5 on-site hours reported
Cable fittings; suitability.
Coal Creek Mine · 480121530 CFR 77.505 · $226.00 proposed penalty
Inspection and cover plates.
Coal Creek Mine · 480121530 CFR 77.512 · $226.00 proposed penalty
Respirable dust standard.
Black Thunder · 480097730 CFR 71.100(b) · $1,818.00 proposed penalty
Cable fittings; suitability.
Black Thunder · 480097730 CFR 77.505 · $151.00 proposed penalty
Electric equipment; examination, testing, and maintenance.
Black Thunder · 480097730 CFR 77.502 · $288.00 proposed penalty
Electric equipment; frequency of examination and testing.
Black Thunder · 480097730 CFR 77.502-2 · $245.00 proposed penalty
Machinery and equipment; operation and maintenance.
Black Thunder · 480097730 CFR 77.404(a) · Significant and substantial (S&S) · $1,818.00 proposed penalty
Examination and maintenance of firefighting equipment.
Black Thunder · 480097730 CFR 77.1110 · $245.00 proposed penalty
Examination and maintenance of firefighting equipment.
Black Thunder · 480097730 CFR 77.1110 · $245.00 proposed penalty
Machinery and equipment; operation and maintenance.
Black Thunder · 480097730 CFR 77.404(a) · Significant and substantial (S&S) · $1,818.00 proposed penalty
Electric equipment; examination, testing, and maintenance.
Black Thunder · 480097730 CFR 77.502 · Significant and substantial (S&S) · $3,184.00 proposed penalty
Cable fittings; suitability.
Black Thunder · 480097730 CFR 77.505 · $151.00 proposed penalty
Electric wiring and equipment; installation and maintenance.
Black Thunder · 480097730 CFR 77.516 · $151.00 proposed penalty
Dust accumulations in surface installations.
Black Thunder · 480097730 CFR 77.202 · $818.00 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.