CalMat Co. safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Requirement for container labels.
San Emidio Plant · 040180030 CFR 47.41(a) · $151.00 proposed penalty
Regular Safety and Health Inspection
San Emidio Plant · 040180026.0 on-site hours reported
Impoundment Spot Inspection
PALMDALE PLANT · 04021251.0 on-site hours reported
Construction and maintenance of guards.
San Emidio Plant · 040180030 CFR 56.14112(b) · $151.00 proposed penalty
Housekeeping.
San Emidio Plant · 040180030 CFR 56.20003(a) · $151.00 proposed penalty
Regular Safety and Health Inspection
SUN CITY PLANT · 02006328.5 on-site hours reported
Testing grounding systems.
West Broadway · 020226130 CFR 56.12028 · $151.00 proposed penalty
Regular Safety and Health Inspection
West Broadway · 020226112.5 on-site hours reported
Regular Safety and Health Inspection
West Plant · 02021666.0 on-site hours reported
Regular Safety and Health Inspection
PENA BLANCA · 290177111.3 on-site hours reported
Safety defects; examination, correction and records.
PENA BLANCA · 290177130 CFR 56.14100(b) · $151.00 proposed penalty
Regular Safety and Health Inspection
MARANA PLANT · 02029197.8 on-site hours reported
First-aid materials.
MARANA PLANT · 020291930 CFR 56.15001 · $151.00 proposed penalty
Moving machine parts.
Chula Vista Quarry · 040408030 CFR 56.14107(a) · $151.00 proposed penalty
Regular Safety and Health Inspection
Chula Vista Quarry · 040408011.5 on-site hours reported
Verbal Hazard Complaint Inspections
Chula Vista Quarry · 04040802.3 on-site hours reported
Regular Safety and Health Inspection
Queen Creek Stone · 02033424.0 on-site hours reported
Regular Safety and Health Inspection
Sanger Plant · 04019376.8 on-site hours reported
Regular Safety and Health Inspection
Austin Quarry · 04059547.5 on-site hours reported
Inspection.
Corona Plant · 040509530 CFR 56.4201(a)(5) · $165.00 proposed penalty
Regular Safety and Health Inspection
Corona Plant · 040509514.5 on-site hours reported
Handrails and toeboards.
Pleasanton Plant · 040192430 CFR 56.11002 · $151.00 proposed penalty
Impoundment Spot Inspection
Pleasanton Plant · 04019243.5 on-site hours reported
Powered haulage
San Bernardino Plant · 0401984Days away from work only
Accident narrative
On 1/5/2026, management was notified of an alleged injury. The employee reported back pain as a result of operating the water truck.
Impoundment Spot Inspection
San Emidio Plant · 04018001.0 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.