Lyons Mine safety activity
MSHA violations, accident reports and inspections.
Safety activity
Moving machine parts.
30 CFR 57.14107(a) · Significant and substantial (S&S) · $549.00 proposed penalty
Inspection and cover plates.
30 CFR 56.12032 · $151.00 proposed penalty
Testing grounding systems.
30 CFR 56.12028 · $151.00 proposed penalty
Brakes.
30 CFR 56.14101(a)(2) · $151.00 proposed penalty
Locking transformer enclosures.
30 CFR 57.12068 · $151.00 proposed penalty
General requirements.
30 CFR 57.4200(b)(2) · $151.00 proposed penalty
Testing grounding systems.
30 CFR 57.12028 · $151.00 proposed penalty
Construction and maintenance of ladders.
30 CFR 56.11003 · $151.00 proposed penalty
Safety defects; examination, correction and records.
30 CFR 56.14100(b) · $151.00 proposed penalty
Insulation and fittings for power wires and cables.
30 CFR 57.12008 · $151.00 proposed penalty
Housekeeping.
30 CFR 57.20003(a) · $151.00 proposed penalty
Regular Safety and Health Inspection
49.3 on-site hours reported
Protection of persons at switchgear.
30 CFR 57.12020 · $151.00 proposed penalty
Safety defects; examination, correction and records.
30 CFR 57.14100(b) · $151.00 proposed penalty
Procedures during repairs or maintenance.
30 CFR 57.14105 · $151.00 proposed penalty
Testing grounding systems.
30 CFR 57.12028 · $151.00 proposed penalty
Heat sources.
30 CFR 57.4500 · Significant and substantial (S&S) · $642.00 proposed penalty
Temporary, portable containers.
30 CFR 47.44(b) · $151.00 proposed penalty
Non-Injury Accident Investigation
13.5 on-site hours reported
Violation — cited standard not reported
Electrical
Accident only
Accident narrative
Tracking and arcing developed on the MMT-3 transformer, faulting the transformer phase to phase. The vacuum breaker at MMT-1 failed to open to disconnect power to the underground power system. Resulted in a fire on the Neutral Ground Resistor on MMT-1 and a failed 12.47kV cable in the mine.
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.
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.