Buzzi Unicem USA safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Distribution boxes.
MARYNEAL QUARRY AND MILL · 410028330 CFR 56.12006 · $398.00 proposed penalty
Regular Safety and Health Inspection
MARYNEAL QUARRY AND MILL · 4100283172.0 on-site hours reported
Spot Inspection
Lone Star Industries · 12000642.0 on-site hours reported
Verbal Hazard Complaint Inspections
Lone Star Industries · 12000642.3 on-site hours reported
Slip or fall of person
MARYNEAL QUARRY AND MILL · 4100283Days away from work only
Accident narrative
Employee removed lid from manhole to pump out water from scales. While waiting on water removal process to be completed, EE picked up an air hose and began walking backwards to remove slack from the hose and stepped into the manhole causing employee to partially fall into opening striking lower back
Insulation and fittings for power wires and cables.
Lone Star Quarry & Mill · 230013430 CFR 56.12008 · $151.00 proposed penalty
Correction of dangerous conditions.
Lone Star Quarry & Mill · 230013430 CFR 56.12030 · Significant and substantial (S&S) · $1,818.00 proposed penalty
Electrical conductors.
Lone Star Quarry & Mill · 230013430 CFR 56.12004 · Significant and substantial (S&S) · $2,312.00 proposed penalty
Construction and maintenance of guards.
Lone Star Quarry & Mill · 230013430 CFR 56.14112(a)(1) · $151.00 proposed penalty
Testing grounding systems.
Lone Star Quarry & Mill · 230013430 CFR 56.12028 · $151.00 proposed penalty
Insulation and fittings for power wires and cables.
Lone Star Quarry & Mill · 230013430 CFR 56.12008 · $151.00 proposed penalty
Controls and switches.
Lone Star Quarry & Mill · 230013430 CFR 56.12002 · $267.00 proposed penalty
Housekeeping.
Lone Star Quarry & Mill · 230013430 CFR 56.20003(a) · $1,431.00 proposed penalty
Regular Safety and Health Inspection
Lone Star Quarry & Mill · 230013468.8 on-site hours reported
Housekeeping.
Lone Star Quarry & Mill · 230013430 CFR 56.20003(a) · $1,431.00 proposed penalty
Handling of materials
Lone Star Industries · 1200064No dys awy frm wrk,no rstr act
Accident narrative
While removing slide above screw conveyor material inside the hopper moved and dust came out of the gap left from the slide removal and got into employees eyes
Machinery
Lone Star Quarry & Mill · 2300134No dys awy frm wrk,no rstr act
Accident narrative
On February 4, 2026, an ACME field employee reported to EE's foreman that EE's right forearm felt strained but did not believe medical attention was needed. EE later requested medical attention, stating EE's forearm began hurting after using an air hammer for two hours removing excess concrete.
Verbal Hazard Complaint Inspections
Lone Star Industries · 12000645.0 on-site hours reported
Spot Inspection
Lone Star Industries · 12000643.0 on-site hours reported
Electrical conductors.
Lone Star Industries · 120006430 CFR 56.12004 · $177.00 proposed penalty
Housekeeping.
Lone Star Industries · 120006430 CFR 56.20003(b) · Significant and substantial (S&S) · $1,968.00 proposed penalty
Correction of dangerous conditions.
Lone Star Industries · 120006430 CFR 56.12030 · Significant and substantial (S&S) · $6,540.00 proposed penalty
Handling of materials
Lone Star Industries · 1200064No dys awy frm wrk,no rstr act
Accident narrative
While moving a long handled scraper the handle hit a beam overhead that dropped dust on top of employee and EE got some in EE's left eye
Handling of materials
Lone Star Industries · 1200064No dys awy frm wrk,no rstr act
Accident narrative
While removing buckets from a bucket elevator employee got something in their eye. Eye doctor removed and prescribed antibiotic eye drops
103 (g) Written Notification Hazard Complaint Inspectio
LONE STAR PRYOR PLT MILL & QY · 34012891.5 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.