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Martin Marietta Northern California Aggregates,LLC safety activity

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

2025-01-01 – 2026-10-28Database snapshot · 2026-10-28

Safety activity

  1. Regular Safety and Health Inspection

    inspectionRecord F005BF1
    Tidewater Oakland Marine Aggregate · 0403002

    6.5 on-site hours reported

  2. Regular Safety and Health Inspection

    inspectionRecord F03EAF9
    Merced Aggregates · 0402841

    10.0 on-site hours reported

  3. Regular Safety and Health Inspection

    inspectionRecord F03EAF8
    Hughson Aggregates · 0401769

    6.0 on-site hours reported

  4. Handling of materials

    accidentRecord 220262820003
    Sanger Aggregate Plant · 0405799

    No dys awy frm wrk,no rstr act

    Accident narrative

    Employee was connecting two 16" pipes when EE's finger was smashed causing a laceration.

  5. Impoundment Spot Inspection

    inspectionRecord F04A765
    SISQUOC AGGREGATES · 0401959

    1.0 on-site hours reported

  6. Regular Safety and Health Inspection

    inspectionRecord F034D68
    Hughson Aggregates · 0401769

    0.5 on-site hours reported

  7. Notification of commencement of operations and closing of mines.

    violationRecord 5162517
    Hughson Aggregates · 0401769

    30 CFR 56.1000 · $151.00 proposed penalty

  8. Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.

    violationRecord 5166726
    SISQUOC AGGREGATES · 0401959

    30 CFR 50.30(a) · $151.00 proposed penalty

  9. Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.

    violationRecord 5166725
    SISQUOC AGGREGATES · 0401959

    30 CFR 50.30(a) · $151.00 proposed penalty

  10. Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.

    violationRecord 5166724
    SISQUOC AGGREGATES · 0401959

    30 CFR 50.30(a) · $151.00 proposed penalty

  11. Regular Safety and Health Inspection

    inspectionRecord F030FAE
    SISQUOC AGGREGATES · 0401959

    7.0 on-site hours reported

  12. Housekeeping.

    violationRecord 5102459
    Clayton Aggregates · 0400159

    30 CFR 56.20003(c) · $151.00 proposed penalty

  13. Moving machine parts.

    violationRecord 5102458
    Clayton Aggregates · 0400159

    30 CFR 56.14107(a) · $151.00 proposed penalty

  14. Regular Safety and Health Inspection

    inspectionRecord F005BED
    Clayton Aggregates · 0400159

    17.8 on-site hours reported

  15. Compliance Follow-up Inspection

    inspectionRecord F034D6F
    Merced Aggregates · 0402841

    1.5 on-site hours reported

  16. Exposure limits for airborne contaminants.

    violationRecord 5162466
    Merced Aggregates · 0402841

    30 CFR 56.5001(a)/56.5005 · Significant and substantial (S&S) · $398.00 proposed penalty

  17. Regular Safety and Health Inspection

    inspectionRecord F034D67
    Merced Aggregates · 0402841

    11.0 on-site hours reported

  18. Regular Safety and Health Inspection

    inspectionRecord F027CAE
    Tidewater Oakland Marine Aggregate · 0403002

    3.3 on-site hours reported

  19. Regular Safety and Health Inspection

    inspectionRecord F03EAE2
    Pier 92 Marine Aggregate · 0405261

    8.8 on-site hours reported

  20. Impoundment Spot Inspection

    inspectionRecord F039E37
    SISQUOC AGGREGATES · 0401959

    1.5 on-site hours reported

  21. Handling of materials

    accidentRecord 220261890021
    Sanger Aggregate Plant · 0405799

    Days restricted activity only

    Accident narrative

    Employee got an index finger injured between two pieces of metal when they tried to remove a jammed rock with index finger on right hand.

  22. Electrical conductors.

    violationRecord 5162421
    Sanger Aggregate Plant · 0405799

    30 CFR 56.12004 · $177.00 proposed penalty

  23. Dump site restraints.

    violationRecord 5162420
    Sanger Aggregate Plant · 0405799

    30 CFR 56.9301 · Significant and substantial (S&S) · $883.00 proposed penalty

  24. Regular Safety and Health Inspection

    inspectionRecord F034D5D
    Sanger Aggregate Plant · 0405799

    9.5 on-site hours reported

  25. Regular Safety and Health Inspection

    inspectionRecord F02C176
    Santa Margarita Aggregates · 0401616

    7.0 on-site hours reported

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.