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Summit Materials LLC safety activity

MSHA violations, accident reports and inspections across the current mine portfolio.

2025-01-01 – 2026-10-31Database snapshot · 2026-10-31

Safety activity

  1. Criteria—MSHA Form 7000-1, Section D.

    violationRecord 9799392
    Hays Quarry · 4104514

    30 CFR 50.20-7(b) · $151.00 proposed penalty

  2. Examination of working places.

    violationRecord 9799391
    Hays Quarry · 4104514

    30 CFR 56.18002 · $151.00 proposed penalty

  3. Regular Safety and Health Inspection

    inspectionRecord 6936191
    Hays Quarry · 4104514

    8.8 on-site hours reported

  4. Spot Inspection

    inspectionRecord F0450FB
    Grantsville Pit · 4202637

    1.5 on-site hours reported

  5. Verbal Hazard Complaint Inspections

    inspectionRecord F0450FC
    Grantsville Pit · 4202637

    1.0 on-site hours reported

  6. Safety defects; examination, correction and records.

    violationRecord 5055491
    Grantsville Pit · 4202637

    30 CFR 56.14100(c) · $288.00 proposed penalty

  7. Construction and maintenance of ladders.

    violationRecord 5055490
    Grantsville Pit · 4202637

    30 CFR 56.11003 · $288.00 proposed penalty

  8. Moving machine parts.

    violationRecord 5055489
    Grantsville Pit · 4202637

    30 CFR 56.14107(a) · $432.00 proposed penalty

  9. Regular Safety and Health Inspection

    inspectionRecord F037505
    STEWART STONE MITCHELL · 3401400

    10.0 on-site hours reported

  10. Regular Safety and Health Inspection

    inspectionRecord F0450F9
    Benjamin · 4202528

    6.3 on-site hours reported

  11. Horns and backup alarms.

    violationRecord 5175420
    STEWART STONE MITCHELL · 3401400

    30 CFR 56.14132(b)(2) · $151.00 proposed penalty

  12. Construction and maintenance of guards.

    violationRecord 5175419
    STEWART STONE MITCHELL · 3401400

    30 CFR 56.14112(b) · Significant and substantial (S&S) · $313.00 proposed penalty

  13. Requirement for container labels.

    violationRecord 5175418
    STEWART STONE MITCHELL · 3401400

    30 CFR 47.41(a) · $151.00 proposed penalty

  14. Air receiver tanks.

    violationRecord 5055480
    Benjamin · 4202528

    30 CFR 56.13011 · $151.00 proposed penalty

  15. Electrical conductors.

    violationRecord 5055479
    Benjamin · 4202528

    30 CFR 56.12004 · $151.00 proposed penalty

  16. Changes; notification by operator.

    violationRecord 5058366
    HIGHLAND PIT · 4200941

    30 CFR 41.12 · $151.00 proposed penalty

  17. Handtools (nonpowered)

    accidentRecord 220261100022
    Pit #1 43rd Ave · 0202867

    Days restricted activity only

    Accident narrative

    EE was changing screens at the washplant and was cutting a piece of rubber using a utility knife. During the cutting motion the knife slipped past the rubber and stabbed the EEs thumb.

  18. Retaining dams.

    violationRecord 9826361
    HIGHLAND PIT · 4200941

    30 CFR 56.20010 · $151.00 proposed penalty

  19. Inundation

    accidentRecord 220261100005
    HIGHLAND PIT · 4200941

    Accident only

    Accident narrative

    Highland city started to fill the canal earlier than what was communicated. When the canal was filled (pressurized) the valve that feeds water to the plant was in an open position to prevent water from freezing over the winter months. With the canal being pressurized and the valve in the open position, water started to flow into the pond causing the damn embankment to fail.

  20. Regular Safety and Health Inspection

    inspectionRecord F02DDA7
    Columbus Plant · 4104393

    5.3 on-site hours reported

  21. Regular Safety and Health Inspection

    inspectionRecord F02D43E
    HIGHLAND PIT · 4200941

    6.8 on-site hours reported

  22. Regular Safety and Health Inspection

    inspectionRecord F03A027
    Brigham Pit · 4202523

    6.0 on-site hours reported

  23. Requirement for container labels.

    violationRecord 5058357
    HIGHLAND PIT · 4200941

    30 CFR 47.41(a) · $465.00 proposed penalty

  24. Moving machine parts.

    violationRecord 5058356
    HIGHLAND PIT · 4200941

    30 CFR 56.14107(a) · $3,448.00 proposed penalty

  25. Moving machine parts.

    violationRecord 5058355
    HIGHLAND PIT · 4200941

    30 CFR 56.14107(a) · $465.00 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.