Rio Tinto Group safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Inspection and cover plates.
Copperton Concentrator · 420199630 CFR 56.12032 · $818.00 proposed penalty
Safety defects; examination, correction and records.
Copperton Concentrator · 420199630 CFR 56.14100(b) · $755.00 proposed penalty
Safety defects; examination, correction and records.
Copperton Concentrator · 420199630 CFR 56.14100(b) · $755.00 proposed penalty
Requirement for container labels.
Copperton Concentrator · 420199630 CFR 47.41(a) · $336.00 proposed penalty
Protection of gas cylinder valves.
Copperton Concentrator · 420199630 CFR 56.16006 · $755.00 proposed penalty
Impoundment Spot Inspection
Copperton Concentrator · 420199623.0 on-site hours reported
Handtools (nonpowered)
Copperton Concentrator · 4201996Days away from work only
Accident narrative
Employee was working down by ball mill 6 and 7 in the cyclone feed pump build up area. Employee was using the bolt for a hammer and smashed a finger.
Slip or fall of person
Bingham Canyon Mine · 4200149Dys awy frm wrk & restrctd act
Accident narrative
Operator was cleaning the operator cab windows from the drill deck, upon re-entering the cab the operator slipped on mud on the deck surface and fell at level impacting their right knee on the floor of the cab causing discomfort.
Fire
Bingham Canyon Mine · 4200149No dys awy frm wrk,no rstr act
Accident narrative
At 19:20 the IP's heavy equipment caught fire. After EE's fire suppressant device failed EE opened the door to EE's vehicle, letting in the smoke before closing the door. After realizing EE should not stay in the vehicle any longer the IP evacuated the vehicle and went into EE's supervisors car awaiting medical aid.
Machinery
Kennecott Keystone Underground · 4201392Fatality
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
Kennecott Keystone Underground · 420139269.3 on-site hours reported
Violation — cited standard not reported
Kennecott Keystone Underground · 4201392Impoundment Spot Inspection
Boron Operations · 04007431.3 on-site hours reported
Spot Inspection
Copperton Concentrator · 42019962.0 on-site hours reported
Escape routes.
Kennecott Keystone Underground · 420139230 CFR 57.11051(b) · $226.00 proposed penalty
Escape routes.
Kennecott Keystone Underground · 420139230 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.
Kennecott Keystone Underground · 420139230 CFR 48.7(a) · $1,355.00 proposed penalty
Handling of materials
Bingham Canyon Mine · 4200149Days away from work only
Accident narrative
Employee dropped phone behind their desk. While moving the desk to retrieve the phone they heard a pop and felt excruciating pain in the right shoulder.
Handling of materials
Boron Operations · 0400743No dys awy frm wrk,no rstr act
Accident narrative
A mechanic was entering the cab of 9107 drill from the mast side. At which time the door slammed shut for unknown reasons, pinching the mechanic's pinky finger between the door jam and the door.
Handtools (nonpowered)
Bingham Canyon Mine · 4200149No dys awy frm wrk,no rstr act
Accident narrative
IP was changing a light on a haul truck and lost control of wrench, which flew back and lacerated their lip. Supervisor called over the emergency line at 12:38pm and arrived at Lark Gate to see EMT at 13:00. EMT cleaned the laceration and sent them to a clinic to get the laceration stitched up.
Inundation
Kennecott Keystone Underground · 4201392No 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.
Kennecott Keystone Underground · 420139230 CFR 57.14100(b) · $151.00 proposed penalty
Identification of power switches.
Kennecott Keystone Underground · 420139230 CFR 57.12018 · $1,219.00 proposed penalty
Distribution boxes.
Kennecott Keystone Underground · 420139230 CFR 57.12006 · $1,219.00 proposed penalty
Barricades and warning signs.
Kennecott Keystone Underground · 420139230 CFR 57.20011 · $1,219.00 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.