Thunder Basin Coal Company LLC safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Identification of circuit breakers and disconnecting switches.
Black Thunder · 480097730 CFR 77.809 · $151.00 proposed penalty
Loading and haulage equipment; operation.
Black Thunder · 480097730 CFR 77.1607(p) · $245.00 proposed penalty
Machinery and equipment; operation and maintenance.
Black Thunder · 480097730 CFR 77.404(a) · $193.00 proposed penalty
Accumulations of combustible materials.
Black Thunder · 480097730 CFR 77.1104 · $209.00 proposed penalty
Quantity and location of firefighting equipment.
Black Thunder · 480097730 CFR 77.1109(a) · Significant and substantial (S&S) · $818.00 proposed penalty
Storage of materials.
Black Thunder · 480097730 CFR 77.208(d) · $245.00 proposed penalty
Examination and maintenance of firefighting equipment.
Black Thunder · 480097730 CFR 77.1110 · $465.00 proposed penalty
Accumulations of combustible materials.
Black Thunder · 480097730 CFR 77.1104 · $209.00 proposed penalty
Welding operations.
Black Thunder · 480097730 CFR 77.408 · Significant and substantial (S&S) · $245.00 proposed penalty
Mobile equipment; automatic warning devices.
Black Thunder · 480097730 CFR 77.410(c) · Significant and substantial (S&S) · $165.00 proposed penalty
Mobile equipment; automatic warning devices.
Black Thunder · 480097730 CFR 77.410(c) · Significant and substantial (S&S) · $165.00 proposed penalty
Loading and haulage equipment; inspection and maintenance.
Black Thunder · 480097730 CFR 77.1606(c) · $151.00 proposed penalty
Protective clothing; requirements.
Black Thunder · 480097730 CFR 77.1710(i) · $151.00 proposed penalty
Accumulations of combustible materials.
Black Thunder · 480097730 CFR 77.1104 · $226.00 proposed penalty
Drill dust control at surface mines and surface areas of underground mines.
Black Thunder · 480097730 CFR 72.620 · $366.00 proposed penalty
Protective clothing; requirements.
Black Thunder · 480097730 CFR 77.1710(i) · $151.00 proposed penalty
Protective clothing; requirements.
Black Thunder · 480097730 CFR 77.1710(g) · Significant and substantial (S&S) · $151.00 proposed penalty
Storage of materials.
Black Thunder · 480097730 CFR 77.208(b) · $151.00 proposed penalty
Loading and haulage equipment; operation.
Black Thunder · 480097730 CFR 77.1607(n) · $151.00 proposed penalty
Loading and haulage equipment; installations.
Black Thunder · 480097730 CFR 77.1605(l) · Significant and substantial (S&S) · $5,144.00 proposed penalty
Mechanical equipment guards.
Black Thunder · 480097730 CFR 77.400(a) · Significant and substantial (S&S) · $1,037.00 proposed penalty
Loading and haulage equipment; operation.
Black Thunder · 480097730 CFR 77.1607(b) · $245.00 proposed penalty
Identification of circuit breakers.
Black Thunder · 480097730 CFR 77.904 · $151.00 proposed penalty
Inspection and cover plates.
Black Thunder · 480097730 CFR 77.512 · $177.00 proposed penalty
Electric equipment; frequency of examination and testing.
Black Thunder · 480097730 CFR 77.502-2 · $245.00 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.