Kennecott Keystone Underground safety activity
MSHA violations, accident reports and inspections.
Safety activity
Procedures during repairs or maintenance.
30 CFR 57.14105
Procedures during repairs or maintenance.
30 CFR 57.14105 · $432.00 proposed penalty
Safety defects; examination, correction and records.
30 CFR 57.14100(b) · $4,047.00 proposed penalty
Parking procedures for unattended equipment.
30 CFR 57.14207 · $4,047.00 proposed penalty
Operators' stations.
30 CFR 57.14103(b) · $1,219.00 proposed penalty
Identification of power switches.
30 CFR 57.12018 · $4,047.00 proposed penalty
Two-way communication equipment for underground operations.
30 CFR 57.20032 · $1,219.00 proposed penalty
Machinery
Fatality
Accident narrative
At approximately 05.12am on the 12th March 2026, a mechanic was struck by a drill boom in a surface workshop, causing fatal injuries.
Fatal Accident Investigation
69.3 on-site hours reported
Violation — cited standard not reported
Escape routes.
30 CFR 57.11051(b) · $226.00 proposed penalty
Escape routes.
30 CFR 57.11051(b) · $4,047.00 proposed penalty
Training of miners assigned to a task in which they have had no previous experience; minimum courses of instruction.
30 CFR 48.7(a) · $1,355.00 proposed penalty
Inundation
No dys awy frm wrk,no rstr act
Accident narrative
Bad Air through bore hole caused oxygen deficient atmosphere and small amounts of H2S gas. Crew driving underground jeep lost power, employee then exited the jeep to check the master switch, the employee immediately could not breath, and yelled to the other two, they then grabbed their rescuers and retreated up the NOSS to fresh air.
Safety defects; examination, correction and records.
30 CFR 57.14100(b) · $151.00 proposed penalty
Identification of power switches.
30 CFR 57.12018 · $1,219.00 proposed penalty
Distribution boxes.
30 CFR 57.12006 · $1,219.00 proposed penalty
Barricades and warning signs.
30 CFR 57.20011 · $1,219.00 proposed penalty
Use of compressed air.
30 CFR 57.13020 · $1,219.00 proposed penalty
Identification of power switches.
30 CFR 57.12018 · $151.00 proposed penalty
Inspection and cover plates.
30 CFR 57.12032 · $226.00 proposed penalty
Horns and backup alarms for surface equipment.
30 CFR 57.14132(a) · Significant and substantial (S&S) · $1,126.00 proposed penalty
Electrical conductors.
30 CFR 57.12004 · $226.00 proposed penalty
Safety defects; examination, correction and records.
30 CFR 57.14100(c) · $151.00 proposed penalty
Operators' stations.
30 CFR 57.14103(b) · $1,818.00 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.
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.