Rio Tinto Group safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Verbal Hazard Complaint Inspections
Kennecott Keystone Underground · 42013924.8 on-site hours reported
Brakes.
Bingham Canyon Mine · 420014930 CFR 56.14101(a)(3) · $642.00 proposed penalty
Spillage and leakage.
Bingham Canyon Mine · 420014930 CFR 56.4102 · $642.00 proposed penalty
Slip or fall of person
Bingham Canyon Mine · 4200149Days restricted activity only
Accident narrative
Operator disconnected the winch cable from the roll off dumpster. Then, the operators right foot/boot/ice cleat caught on the corner of the dumpsters frame causing them to lose their balance, tripping backwards and landing on their elbow/ shoulder straining their shoulder.
Spot Inspection
Kennecott Keystone Underground · 42013920.0 on-site hours reported
Immediate notification.
Kennecott Keystone Underground · 420139230 CFR 50.10(b) · $7,555.00 proposed penalty
Immediate notification.
Kennecott Keystone Underground · 420139230 CFR 50.10(b) · $7,555.00 proposed penalty
Verbal Hazard Complaint Inspections
Kennecott Keystone Underground · 42013923.0 on-site hours reported
Handling of materials
Boron Operations · 0400743Days away from work only
Accident narrative
Employee was chasing threads on an impeller when the employee's shirt sleeve was caught in the vane of the impeller. At contact employee pulled away thus dislodging impeller which caused it to hit employees left side rm and the left side of their face.
Handling of materials
Kennecott Keystone Underground · 4201392No dys awy frm wrk,no rstr act
Accident narrative
Crew was hand installing cable bolts at the 3100 intersection. The injured person was handing cable up to miners in a work basket when the employee felt one catch on their arm. The employee finished feeding the cable and noticed bleeding from a laceration on the left wrist. Employee received 10 stitches.
Machinery
Bingham Canyon Mine · 4200149No dys awy frm wrk,no rstr act
Accident narrative
DZ599 operator was backing up in second gear when the park break self-engaged causing the dozer to come to a complete stop resulting in the operator's experiencing whiplash to their neck. IP received no treatment and declined care. On 12/04/25, IP was using a track hoe and caused aggravation that worsened with time. Sent to RMMC for care and was prescribed medication.
Machinery
Bingham Canyon Mine · 4200149No dys awy frm wrk,no rstr act
Accident narrative
Employee was using a 3/4" drive impact gun to get the bolts properly torqued. Some of them needed to have a backer wrench to keep bolt from spinning. On one of the bolts the wrench caught the nylock part when torquing the impact, and pinched right hand pinky fingertip.
Housekeeping.
Boron Operations · 040074330 CFR 56.20003(a) · Significant and substantial (S&S) · $959.00 proposed penalty
Construction and maintenance of guards.
Boron Operations · 040074330 CFR 56.14112(b) · $465.00 proposed penalty
Testing grounding systems.
Boron Operations · 040074330 CFR 56.12028 · $755.00 proposed penalty
Annual refresher training of miners; minimum courses of instruction; hours of instruction.
Boron Operations · 040074330 CFR 48.28(a) · $151.00 proposed penalty
General requirements.
Boron Operations · 040074330 CFR 56.4200(b)(2) · $177.00 proposed penalty
Inspection.
Boron Operations · 040074330 CFR 56.4201(a)(2) · $398.00 proposed penalty
Electrical conductors.
Boron Operations · 040074330 CFR 56.12004 · $151.00 proposed penalty
Illumination of surface working areas.
Boron Operations · 040074330 CFR 56.17001 · $267.00 proposed penalty
Illumination of surface working areas.
Boron Operations · 040074330 CFR 56.17001 · $267.00 proposed penalty
Protection of persons at switchgear.
Boron Operations · 040074330 CFR 56.12020 · $398.00 proposed penalty
Stacking and storage of materials.
Boron Operations · 040074330 CFR 56.16001 · $151.00 proposed penalty
Stacking and storage of materials.
Boron Operations · 040074330 CFR 56.16001 · $151.00 proposed penalty
Stacking and storage of materials.
Boron Operations · 040074330 CFR 56.16001 · $151.00 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.