Martin Marietta Materials, Inc. safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Electrical conductors.
Iowa Grading 2 · 130231630 CFR 56.12004 · $151.00 proposed penalty
Extinguisher recharging or replacement.
Louisburg Quarry · 140082330 CFR 56.4203 · $151.00 proposed penalty
Electrical conductors.
Denver Quarry · 310197130 CFR 56.12004 · $209.00 proposed penalty
Closure of valves.
Denver Quarry · 310197130 CFR 56.4603 · $151.00 proposed penalty
Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.
Denver Quarry · 310197130 CFR 50.30(a) · $151.00 proposed penalty
Horns and backup alarms.
Denver Quarry · 310197130 CFR 56.14132(a) · $151.00 proposed penalty
Inspection.
Milford Quarry · 420217730 CFR 56.4201(a)(2) · $313.00 proposed penalty
Horns and backup alarms.
Milford Quarry · 420217730 CFR 56.14132(a) · $209.00 proposed penalty
Inspection.
Milford Quarry · 420217730 CFR 56.4201(a)(2) · $313.00 proposed penalty
Berms or guardrails.
Milford Quarry · 420217730 CFR 56.9300(a) · $151.00 proposed penalty
Spot Inspection
Moore Quarry · 13021880.8 on-site hours reported
Regular Safety and Health Inspection
ARROWOOD · 310005921.5 on-site hours reported
Regular Safety and Health Inspection
Denver Quarry · 310197129.5 on-site hours reported
Regular Safety and Health Inspection
Milford Quarry · 420217716.5 on-site hours reported
Regular Safety and Health Inspection
Martin Marietta - Piney River Quarry · 440003517.5 on-site hours reported
Ventilation plan.
Fort Dodge Mine · 130003230 CFR 57.8520(b)(9) · $151.00 proposed penalty
Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.
Fort Dodge Mine · 130003230 CFR 50.30(a) · $151.00 proposed penalty
Dust control.
Moore Quarry · 130218830 CFR 56.9315 · Significant and substantial (S&S) · $1,818.00 proposed penalty
Safe access.
ARROWOOD · 310005930 CFR 56.11001 · $151.00 proposed penalty
Safe access.
ARROWOOD · 310005930 CFR 56.11001 · $151.00 proposed penalty
Handling of materials
Fort Myers Quarry · 0801203Days restricted activity only
Accident narrative
Employee was leaning across the drag line cable electrical box to verify there was no energy prior to performing work The door closed, hitting the employee. Incident date: 1/25/25. Became reportable when employee received restrictions on 2/7/25
Regular Safety and Health Inspection
Cedar Rapids Quarry · 13001223.5 on-site hours reported
Regular Safety and Health Inspection
Maylene Plant & Quarry · 01006347.0 on-site hours reported
Regular Safety and Health Inspection
Bluff City Mine · 110012222.8 on-site hours reported
Testing grounding systems.
Bluff City Mine · 110012230 CFR 57.12028 · $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.