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 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.
Regular Safety and Health Inspection
Sunol Aggregates · 040185911.3 on-site hours reported
Regular Safety and Health Inspection
BALLGROUND MINE SITE · 090095520.5 on-site hours reported
Regular Safety and Health Inspection
Kentucky Avenue Mine · 120176247.8 on-site hours reported
Regular Safety and Health Inspection
Durham Mine & Mill · 130122525.5 on-site hours reported
Regular Safety and Health Inspection
Bowling Green South Quarry · 150002538.0 on-site hours reported
Regular Safety and Health Inspection
GREENWOOD QUARRY · 230014119.8 on-site hours reported
Regular Safety and Health Inspection
Iron Mountain Quarry · 230021029.5 on-site hours reported
Regular Safety and Health Inspection
Fort Calhoun Underground Mine · 250130093.3 on-site hours reported
Regular Safety and Health Inspection
ASHEBORO · 31000664.0 on-site hours reported
Regular Safety and Health Inspection
Thomasville Quarry · 310147514.3 on-site hours reported
Regular Safety and Health Inspection
Monterey Sand · 40007988.5 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.