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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. Spot Inspection

    inspectionRecord F0142C6
    Cumberland Quarry · 1500037

    2.5 on-site hours reported

  2. Regular Safety and Health Inspection

    inspectionRecord F0370A5
    Yellow Medicine Quarry · 2100033

    12.3 on-site hours reported

  3. Exploding vessels under pressure

    accidentRecord 220260890027
    NORTH BRIDGEPORT QUARRY · 4103360

    Perm tot or perm prtl disablty

    Accident narrative

    An OTR technician at a quarry installed two spare tires and a new wheel on a Komatsu WA900 loader. While demounting the scrap tire/wheel in the storage yard, EE removed the O-ring with EE's left hand. Residual pressure caused the bead seat band to spring upward, striking EE's left thumb and index finger. This amputated the tip of EE's left index finger and crushed EE's left thumb.

  4. Regular Safety and Health Inspection

    inspectionRecord F02776A
    DOUGLASVILLE MINE SITE · 0900024

    7.0 on-site hours reported

  5. Mine Idle Activity

    inspectionRecord F017781
    Johnson County Sand and Gravel · 1202506

    0.5 on-site hours reported

  6. Spot Inspection

    inspectionRecord F025895
    HUGO · 3400061

    10.0 on-site hours reported

  7. Spot Inspection

    inspectionRecord F025894
    SAWYER · 3401634

    11.8 on-site hours reported

  8. Spot Inspection

    inspectionRecord F018C85
    MIDWAY QUARRY · 4001169

    22.0 on-site hours reported

  9. Safety defects; examination, correction and records.

    violationRecord 5045868
    Hartford Quarry · 1500095

    30 CFR 56.14100(b) · $151.00 proposed penalty

  10. Barricades and warning signs.

    violationRecord 5064248
    SDI Aggregates LLC · 0801336

    30 CFR 56.20011 · $151.00 proposed penalty

  11. Barricades and warning signs.

    violationRecord 5064247
    SDI Aggregates LLC · 0801336

    30 CFR 56.20011 · $465.00 proposed penalty

  12. Regular Safety and Health Inspection

    inspectionRecord F01605E
    SDI Aggregates LLC · 0801336

    14.5 on-site hours reported

  13. Regular Safety and Health Inspection

    inspectionRecord F02AF8F
    EARLHAM GRADING CREW · 1301778

    3.0 on-site hours reported

  14. Regular Safety and Health Inspection

    inspectionRecord F037B05
    Maple Grove Pit · 2101112

    7.5 on-site hours reported

  15. Regular Safety and Health Inspection

    inspectionRecord F037B06
    MN Reclamation Crew · 2103690

    3.8 on-site hours reported

  16. Spot Inspection

    inspectionRecord F031A18
    CHARLOTTE QUARRY · 3100057

    6.8 on-site hours reported

  17. Testing grounding systems.

    violationRecord 5064635
    Fort Myers Quarry · 0801203

    30 CFR 56.12028 · $245.00 proposed penalty

  18. Housekeeping.

    violationRecord 5064634
    Fort Myers Quarry · 0801203

    30 CFR 56.20003(b) · $151.00 proposed penalty

  19. Warning signs.

    violationRecord 5064633
    Fort Myers Quarry · 0801203

    30 CFR 56.4101 · $151.00 proposed penalty

  20. Insulation and fittings for power wires and cables.

    violationRecord 5064614
    Fort Myers Quarry · 0801203

    30 CFR 56.12008 · $151.00 proposed penalty

  21. Stairstep clearance.

    violationRecord 5064246
    SDI Aggregates LLC · 0801336

    30 CFR 56.11010 · $313.00 proposed penalty

  22. Safety defects; examination, correction and records.

    violationRecord 5114639
    EARLHAM GRADING CREW · 1301778

    30 CFR 56.14100(c) · $151.00 proposed penalty

  23. Snow and ice on walkways and travelways.

    violationRecord 9697163
    Maple Grove Pit · 2101112

    30 CFR 56.11016 · Significant and substantial (S&S) · $818.00 proposed penalty

  24. Grounding circuit enclosures.

    violationRecord 9791787
    Martin Marietta Vealmoor Plant · 4101137

    30 CFR 56.12025 · $177.00 proposed penalty

  25. Powered haulage

    accidentRecord 220260890088
    Troy West Quarry · 2302324

    Days away from work only

    Accident narrative

    The employee was entering a skid steer, lost their footing and fell backwards, catching their left leg between the skid steer and the fork attachment fracturing their leg.

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.