Martin Marietta Materials Inc safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Electrical conductors.
Durham Mine & Mill · 130122530 CFR 57.12004 · $245.00 proposed penalty
Unguarded conveyors with adjacent travelways.
Iron Mountain Quarry · 230021030 CFR 56.14109(a) · $151.00 proposed penalty
Inspection and cover plates.
Iron Mountain Quarry · 230021030 CFR 56.12032 · $151.00 proposed penalty
Electrical conductors.
Iron Mountain Quarry · 230021030 CFR 56.12004 · $151.00 proposed penalty
New task training.
Berkeley Quarry · 380007230 CFR 46.7(a) · $168.00 proposed penalty
Safety defects; examination, correction and records.
Berkeley Quarry · 380007230 CFR 56.14100(b) · $151.00 proposed penalty
Safety defects; examination, correction and records.
Berkeley Quarry · 380007230 CFR 56.14100(b) · $151.00 proposed penalty
Regular Safety and Health Inspection
Davis Quarry · 34012999.5 on-site hours reported
Regular Safety and Health Inspection
TIN TOP SAND AND GRAVEL PLANT · 410285211.5 on-site hours reported
Impoundment Spot Inspection
RED HILL QUARRY · 44000723.0 on-site hours reported
Construction and maintenance of guards.
Durham Mine & Mill · 130122530 CFR 57.14112(a) · $151.00 proposed penalty
Electrical conductors.
Durham Mine & Mill · 130122530 CFR 56.12004 · $151.00 proposed penalty
Testing grounding systems.
Bowling Green South Quarry · 150002530 CFR 56.12028 · $151.00 proposed penalty
Housekeeping.
GREENWOOD QUARRY · 230014130 CFR 56.20003(a) · $151.00 proposed penalty
Barricades and warning signs.
GREENWOOD QUARRY · 230014130 CFR 56.20011 · $245.00 proposed penalty
Safety defects; examination, correction and records.
Iron Mountain Quarry · 230021030 CFR 56.14100(b) · $151.00 proposed penalty
General requirements for boilers and pressure vessels.
Iron Mountain Quarry · 230021030 CFR 56.13001 · $151.00 proposed penalty
Spillage and leakage.
Fort Calhoun Underground Mine · 250130030 CFR 57.4102 · $151.00 proposed penalty
Safe access.
TIN TOP SAND AND GRAVEL PLANT · 410285230 CFR 56.11001 · $151.00 proposed penalty
Horns and backup alarms.
TIN TOP SAND AND GRAVEL PLANT · 410285230 CFR 56.14132(b)(1)(i) · $151.00 proposed penalty
Electrical conductors.
TIN TOP SAND AND GRAVEL PLANT · 410285230 CFR 56.12004 · $151.00 proposed penalty
Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.
TIN TOP SAND AND GRAVEL PLANT · 410285230 CFR 50.30(a) · $151.00 proposed penalty
Safety defects; examination, correction and records.
TIN TOP SAND AND GRAVEL PLANT · 410285230 CFR 56.14100(b) · $151.00 proposed penalty
Slip or fall of person
MN Reclamation Crew · 2103690Days restricted activity only
Accident narrative
Employee slipped while walking out of enclosed trailer.
Other
CHARLOTTE QUARRY · 3100057No dys awy frm wrk,no rstr act
Accident narrative
Employee was climbing ladder into equipment and felt a pop in their right knee. Injury did not become reportable until 7/1/2025 when employee was prescribed and attended physical therapy.
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.