Buzzi Unicem USA safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Verbal Hazard Complaint Inspections
MARYNEAL QUARRY AND MILL · 41002831.0 on-site hours reported
Other
Lone Star Quarry & Mill · 2300134No dys awy frm wrk,no rstr act
Accident narrative
Employee was working near the doorway at the alkali spray tower dump box when wind blew dust under EE's safety glasses. This caused EE's left eye to become irritated. This did not become reportable until the employee went to the doctor on 1/9/2026, when the doctor prescribed eyedrops.
Compliance Follow-up Inspection
LONE STAR PRYOR PLT MILL & QY · 34012891.3 on-site hours reported
Safety defects; examination, correction and records.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.14100(b) · $209.00 proposed penalty
Installation of operating controls.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.12040 · $549.00 proposed penalty
Moving machine parts.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.14107(a) · $245.00 proposed penalty
Construction and maintenance of guards.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.14112(b) · Significant and substantial (S&S) · $1,219.00 proposed penalty
Safety procedures for towing.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.14209(b) · $165.00 proposed penalty
Housekeeping.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.20003(a) · $165.00 proposed penalty
Safety defects; examination, correction and records.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.14100(b) · Significant and substantial (S&S) · $27,603.00 proposed penalty
Procedures during repairs or maintenance.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.14105 · $288.00 proposed penalty
Safety defects; examination, correction and records.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.14100(b) · $592.00 proposed penalty
Roll-over protective structures (ROPS) and seat belts.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.14130(c) · $151.00 proposed penalty
Housekeeping.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.20003(a) · Significant and substantial (S&S) · $959.00 proposed penalty
Identification of power switches.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.12018 · $151.00 proposed penalty
High-pressure hose connections.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.13021 · $151.00 proposed penalty
Identification of power switches.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 56.12018 · $151.00 proposed penalty
Regular Safety and Health Inspection
LONE STAR PRYOR PLT MILL & QY · 340128943.5 on-site hours reported
Non-Injury Accident Investigation
LONE STAR PRYOR PLT MILL & QY · 34012895.3 on-site hours reported
Immediate notification.
LONE STAR PRYOR PLT MILL & QY · 340128930 CFR 50.10(d) · $151.00 proposed penalty
Ignition or explosion of gas or dust
LONE STAR PRYOR PLT MILL & QY · 3401289Accident only
Accident narrative
Kiln #1 baghouse ductwork unplanned ignition. The pressure resulting caused damage.
Safety defects; examination, correction and records.
MARYNEAL QUARRY AND MILL · 410028330 CFR 56.14100(b) · $366.00 proposed penalty
Barricades and warning signs.
MARYNEAL QUARRY AND MILL · 410028330 CFR 56.20011 · $2,712.00 proposed penalty
Housekeeping.
MARYNEAL QUARRY AND MILL · 410028330 CFR 56.20003(a) · $23,525.00 proposed penalty
Housekeeping.
MARYNEAL QUARRY AND MILL · 410028330 CFR 56.20003(a) · Significant and substantial (S&S) · $23,525.00 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.