Summit Materials LLC safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Identification of power switches.
Smith Plant · 410521030 CFR 56.12018 · $151.00 proposed penalty
Regular Safety and Health Inspection
Duncan Plant · 41051876.5 on-site hours reported
Training plan implementation.
Vox Plant · 410508130 CFR 46.4(a)(1) · $151.00 proposed penalty
Housekeeping.
Duncan Plant · 410518730 CFR 56.20003(c) · $151.00 proposed penalty
Regular Safety and Health Inspection
Vox Plant · 41050817.8 on-site hours reported
Brakes.
STEWART STONE MITCHELL · 340140030 CFR 56.14101(a)(2) · $151.00 proposed penalty
Electrical conductors.
STEWART STONE MITCHELL · 340140030 CFR 56.12004 · $151.00 proposed penalty
Safety defects; examination, correction and records.
Vox Plant · 410508130 CFR 56.14100(a) · $151.00 proposed penalty
Regular Safety and Health Inspection
STEWART STONE MITCHELL · 340140011.3 on-site hours reported
Safety defects; examination, correction and records.
STEWART STONE MITCHELL · 340140030 CFR 56.14100(b) · $151.00 proposed penalty
Housekeeping.
STEWART STONE MITCHELL · 340140030 CFR 56.20003(a) · Significant and substantial (S&S) · $226.00 proposed penalty
Protection for openings around travelways.
STEWART STONE MITCHELL · 340140030 CFR 56.11012 · $151.00 proposed penalty
Use of ladders.
Sawyer Quarry · 340195030 CFR 56.11011 · Significant and substantial (S&S) · $313.00 proposed penalty
Horns and backup alarms.
Sawyer Quarry · 340195030 CFR 56.14132(a) · $151.00 proposed penalty
Insulation and fittings for power wires and cables.
Sawyer Quarry · 340195030 CFR 56.12008 · $151.00 proposed penalty
Regular Safety and Health Inspection
Sawyer Quarry · 340195016.8 on-site hours reported
Warning signs.
Sawyer Quarry · 340195030 CFR 56.4101 · $151.00 proposed penalty
Regular Safety and Health Inspection
Stockton Pit · 42024808.3 on-site hours reported
Housekeeping.
Stockton Pit · 420248030 CFR 56.20003(b) · Significant and substantial (S&S) · $245.00 proposed penalty
Inspection and cover plates.
Stockton Pit · 420248030 CFR 56.12032 · $151.00 proposed penalty
Electrical conductors.
Stockton Pit · 420248030 CFR 56.12004 · $165.00 proposed penalty
Protection of power conductors from mobile equipment.
Stockton Pit · 420248030 CFR 56.12005 · $151.00 proposed penalty
Regular Safety and Health Inspection
Hanna's Bend Plant · 410463119.3 on-site hours reported
Regular Safety and Health Inspection
Brigham Pit · 42025235.0 on-site hours reported
Moving machine parts.
Hanna's Bend Plant · 410463130 CFR 56.14107(a) · $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.