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Martin Marietta Materials Inc 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. Handling of materials

    accidentRecord 220262370026
    Irwindale Aggregates · 0401838

    No dys awy frm wrk,no rstr act

    Accident narrative

    During a maintenance task employees were tasked to replace 12' section of drip rail flashing material when a gust of wind displaced it impacting employees chin.

  2. Regular Safety and Health Inspection

    inspectionRecord F04322E
    Auburn Quarry · 0100006

    4.0 on-site hours reported

  3. Regular Safety and Health Inspection

    inspectionRecord F0444FE
    CHESTERFIELD QUARRY · 3800682

    21.3 on-site hours reported

  4. Safety defects; examination, correction and records.

    violationRecord 5193119
    CHESTERFIELD QUARRY · 3800682

    30 CFR 56.14100(b) · $151.00 proposed penalty

  5. Safety defects; examination, correction and records.

    violationRecord 5193118
    CHESTERFIELD QUARRY · 3800682

    30 CFR 56.14100(b) · $151.00 proposed penalty

  6. Inspection.

    violationRecord 5193117
    CHESTERFIELD QUARRY · 3800682

    30 CFR 56.4201(a)(2) · $151.00 proposed penalty

  7. Safety defects; examination, correction and records.

    violationRecord 5193116
    CHESTERFIELD QUARRY · 3800682

    30 CFR 56.14100(a) · Significant and substantial (S&S) · $366.00 proposed penalty

  8. Safety defects; examination, correction and records.

    violationRecord 5193115
    CHESTERFIELD QUARRY · 3800682

    30 CFR 56.14100(b) · $151.00 proposed penalty

  9. Safe access.

    violationRecord 5193114
    CHESTERFIELD QUARRY · 3800682

    30 CFR 56.11001 · Significant and substantial (S&S) · $151.00 proposed penalty

  10. Safety defects; examination, correction and records.

    violationRecord 5193113
    CHESTERFIELD QUARRY · 3800682

    30 CFR 56.14100(b) · $151.00 proposed penalty

  11. Safe access.

    violationRecord 5176975
    Clifton Plant · 4100013

    30 CFR 56.11001

  12. Brakes.

    violationRecord 5176974
    Clifton Plant · 4100013

    30 CFR 56.14101(a)(2) · Significant and substantial (S&S)

  13. Housekeeping.

    violationRecord 5176973
    Clifton Plant · 4100013

    30 CFR 56.20003(a) · Significant and substantial (S&S)

  14. Housekeeping.

    violationRecord 5176972
    Clifton Plant · 4100013

    30 CFR 56.20003(a)

  15. Powered haulage

    accidentRecord 220262380020
    Camak Quarry · 0900075

    Days away from work only

    Accident narrative

    Rigid frame water truck drove onto right hand side berm, causing the truck to lay over. Employees are was caught between the cab of the truck and the ground

  16. Mine Idle Activity

    inspectionRecord F046E2F
    DOUGLAS PLANT · 0200022

    0.3 on-site hours reported

  17. Regular Safety and Health Inspection

    inspectionRecord F03A2BB
    Missouri Portable #5 · 2302612

    4.8 on-site hours reported

  18. Regular Safety and Health Inspection

    inspectionRecord F04622C
    Clifton Plant · 4100013

    61.0 on-site hours reported

  19. Warning signs.

    violationRecord 5042368
    Champ Quarry · 2300220

    30 CFR 56.4101

  20. General requirements.

    violationRecord 5043953
    Missouri Portable #5 · 2302612

    30 CFR 56.4200(b)(2)

  21. Construction and maintenance of guards.

    violationRecord 5043952
    Missouri Portable #5 · 2302612

    30 CFR 56.14112(a)(1)

  22. Construction and maintenance of guards.

    violationRecord 5176971
    Clifton Plant · 4100013

    30 CFR 56.14112(b) · Significant and substantial (S&S)

  23. Securing movable parts.

    violationRecord 5176970
    Clifton Plant · 4100013

    30 CFR 56.14206(b) · $151.00 proposed penalty

  24. Safety defects; examination, correction and records.

    violationRecord 5176969
    Clifton Plant · 4100013

    30 CFR 56.14100(b) · $151.00 proposed penalty

  25. Safety defects; examination, correction and records.

    violationRecord 5176968
    Clifton Plant · 4100013

    30 CFR 56.14100(a) · $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.