Martin Marietta Materials Inc safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Safety defects; examination, correction and records.
Monterey Sand · 400079830 CFR 56.14100(b) · $151.00 proposed penalty
Regular Safety and Health Inspection
Camak Quarry · 09000754.5 on-site hours reported
Roof Control Technical Investigation
BURNING SPRINGS MINE · 46088627.5 on-site hours reported
Regular Safety and Health Inspection
Appling Quarry · 09010836.3 on-site hours reported
Impoundment Spot Inspection
Stamper Underground · 23022322.0 on-site hours reported
Regular Safety and Health Inspection
Stamper Underground · 23022321.5 on-site hours reported
Compliance Follow-up Inspection
Marble Falls Plant · 41031900.0 on-site hours reported
Moving machine parts.
Appling Quarry · 090108330 CFR 56.14107(a) · $151.00 proposed penalty
Berms or guardrails.
Fort Calhoun Underground Mine · 250130030 CFR 57.9300(b) · $151.00 proposed penalty
Two-way communication equipment for underground operations.
Fort Calhoun Underground Mine · 250130030 CFR 57.20032 · $151.00 proposed penalty
Temporary, portable containers.
Fort Calhoun Underground Mine · 250130030 CFR 47.44(b) · $151.00 proposed penalty
Securing gas cylinders.
ELIZABETHTON QUARRY · 400307530 CFR 56.16005 · $151.00 proposed penalty
Impoundment Spot Inspection
Spec Agg Quarry · 05008601.5 on-site hours reported
Regular Safety and Health Inspection
Louisburg Quarry · 14008236.5 on-site hours reported
Regular Safety and Health Inspection
ELIZABETHTON QUARRY · 400307515.5 on-site hours reported
Firefighting drills.
North Indianapolis Quarry & Mill · 120000230 CFR 56.4331 · $313.00 proposed penalty
Handrails and toeboards.
Plant #65 · 230192230 CFR 56.11002 · $151.00 proposed penalty
Moving machine parts.
Plant #65 · 230192230 CFR 56.14107(a) · $151.00 proposed penalty
Spillage and leakage.
Plant #65 · 230192230 CFR 56.4102 · Significant and substantial (S&S) · $288.00 proposed penalty
Flying or falling materials.
Fort Calhoun Underground Mine · 250130030 CFR 57.14110 · $151.00 proposed penalty
Construction and maintenance of ventilation doors.
Fort Calhoun Underground Mine · 250130030 CFR 57.8531(c) · $151.00 proposed penalty
Handling of materials
Fort Calhoun Underground Mine · 2501300Days restricted activity only
Accident narrative
Employee attempted to move a drill steel and felt a pop in the left elbow. Was not reported until one week later. Injury became reportable when surgery was performed on 07/08/2026
Impoundment Spot Inspection
Plant #65 · 23019225.3 on-site hours reported
Regular Safety and Health Inspection
Hunter Stone · 410523018.3 on-site hours reported
Compliance Follow-up Inspection
Granite Canyon Quarry · 48000181.3 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.