Martin Marietta Materials Southwest LLC safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Inspection.
Mill Creek Limestone Quarry · 340185930 CFR 56.4201(a)(1) · $151.00 proposed penalty
Storage facilities.
Mill Creek Limestone Quarry · 340185930 CFR 56.4430(a)(2)
Safety defects; examination, correction and records.
Mill Creek Limestone Quarry · 340185930 CFR 56.14100(c) · Significant and substantial (S&S) · $398.00 proposed penalty
Horns and backup alarms.
Mill Creek Limestone Quarry · 340185930 CFR 56.14132(a) · $151.00 proposed penalty
Roll-over protective structures (ROPS) and seat belts.
Mill Creek Limestone Quarry · 340185930 CFR 56.14130(g) · Significant and substantial (S&S) · $165.00 proposed penalty
Regular Safety and Health Inspection
Mill Creek Limestone Quarry · 340185921.5 on-site hours reported
Regular Safety and Health Inspection
Medina Rock & Rail · 410517021.8 on-site hours reported
Regular Safety and Health Inspection
Beckmann Quarry · 410133514.8 on-site hours reported
Regular Safety and Health Inspection
TIN TOP SAND AND GRAVEL PLANT · 41028529.0 on-site hours reported
Housekeeping.
TIN TOP SAND AND GRAVEL PLANT · 410285230 CFR 56.20003(a) · $151.00 proposed penalty
Electrical conductors.
TIN TOP SAND AND GRAVEL PLANT · 410285230 CFR 56.12004 · $151.00 proposed penalty
Compliance Follow-up Inspection
Webberville S&G · 41043631.0 on-site hours reported
Safe access.
Webberville S&G · 410436330 CFR 56.11001 · $151.00 proposed penalty
Regular Safety and Health Inspection
Webberville S&G · 410436316.8 on-site hours reported
Electrical conductors.
Webberville S&G · 410436330 CFR 56.12004 · $151.00 proposed penalty
Regular Safety and Health Inspection
Perryville Aggregates Plant #2 · 16014171.3 on-site hours reported
Compliance Follow-up Inspection
Martin Marietta Merkel Plant · 41038481.0 on-site hours reported
Regular Safety and Health Inspection
211 QUARRY · 41038293.3 on-site hours reported
Regular Safety and Health Inspection
Hunter Stone · 410523018.3 on-site hours reported
Safety defects; examination, correction and records.
Hunter Stone · 410523030 CFR 56.14100(b) · $151.00 proposed penalty
Regular Safety and Health Inspection
Rio Medina · 41035947.5 on-site hours reported
Horns and backup alarms.
Rio Medina · 410359430 CFR 56.14132(a) · $151.00 proposed penalty
Regular Safety and Health Inspection
Martin Marietta Merkel Plant · 41038489.3 on-site hours reported
General instructions for completing MSHA Form 7000-1.
Martin Marietta Merkel Plant · 410384830 CFR 50.20-1 · $151.00 proposed penalty
Housekeeping.
Martin Marietta Merkel Plant · 410384830 CFR 56.20003(b) · $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.