US Aggregates LLC safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Slip or fall of person
US Aggregates-Lowell Quarry · 1202134Days restricted activity only
Accident narrative
A miner tweaked EE's knee while accessing the boat to work on the water pump. The injury occurred on 5/15/2026 and was placed on restricted duty on 5/18/2026. The miner has returned to full duty on 5/22/2026 with no lost work days.
Correction of dangerous conditions.
US Aggregates-Portland Quarry · 120010230 CFR 56.12030 · $267.00 proposed penalty
Regular Safety and Health Inspection
US Aggregates-Portland Quarry · 120010223.0 on-site hours reported
Electrical conductors.
US Aggregates-Portland Quarry · 120010230 CFR 56.12004 · $151.00 proposed penalty
Correction of dangerous conditions.
US Aggregates-Portland Quarry · 120010230 CFR 56.12030 · $313.00 proposed penalty
Testing grounding systems.
US Aggregates-Portland Quarry · 120010230 CFR 56.12028 · $151.00 proposed penalty
Regular Safety and Health Inspection
US Aggregates-Flat Rock Plant · 12000167.5 on-site hours reported
Regular Safety and Health Inspection
Crawfordsville Plant · 12021418.5 on-site hours reported
Regular Safety and Health Inspection
Us Aggregates Richmond Plant · 12022126.8 on-site hours reported
Testing grounding systems.
US Aggregates-Flat Rock Plant · 120001630 CFR 56.12028 · $151.00 proposed penalty
Correction of dangerous conditions.
US Aggregates-Flat Rock Plant · 120001630 CFR 56.12030 · $151.00 proposed penalty
Regular Safety and Health Inspection
US Aggregates-Monon Quarry · 12001949.5 on-site hours reported
Testing grounding systems.
US Aggregates-Monon Quarry · 120019430 CFR 56.12028 · $151.00 proposed penalty
Identification of power switches.
US Aggregates-Monon Quarry · 120019430 CFR 56.12018 · $151.00 proposed penalty
Regular Safety and Health Inspection
US Aggregates - Thorntown Sand & Gravel · 120058212.8 on-site hours reported
Correction of dangerous conditions.
Delphi Plant · 120002330 CFR 56.12030 · $151.00 proposed penalty
Testing grounding systems.
Delphi Plant · 120002330 CFR 56.12028 · Significant and substantial (S&S) · $336.00 proposed penalty
Electrical conductors.
Delphi Plant · 120002330 CFR 56.12004 · Significant and substantial (S&S) · $336.00 proposed penalty
Inspection and cover plates.
US Aggregates - Thorntown Sand & Gravel · 120058230 CFR 56.12032 · $151.00 proposed penalty
Regular Safety and Health Inspection
Delphi Plant · 120002323.3 on-site hours reported
Safety defects; examination, correction and records.
Delphi Plant · 120002330 CFR 56.14100(b) · $151.00 proposed penalty
Safety defects; examination, correction and records.
Delphi Plant · 120002330 CFR 56.14100(b) · $151.00 proposed penalty
Verbal Hazard Complaint Inspections
US Aggregates-Francesville Quarry · 12001361.5 on-site hours reported
Regular Safety and Health Inspection
US Aggregates-Swisher Plant · 12022646.8 on-site hours reported
Compliance Follow-up Inspection
US Aggregates-Columbus Plant · 12000730.8 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.