CalMat Co. safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Impoundment Spot Inspection
PALMDALE PLANT · 04021251.5 on-site hours reported
Regular Safety and Health Inspection
San Bernardino Plant · 040198413.0 on-site hours reported
Regular Safety and Health Inspection
LEXINGTON QUARRY · 04009464.0 on-site hours reported
Regular Safety and Health Inspection
VAL VISTA - CITRUS GROVE 150 · 02028913.3 on-site hours reported
Regular Safety and Health Inspection
RELIANCE PLANT · 040320010.0 on-site hours reported
Regular Safety and Health Inspection
Napa Quarry · 040002310.5 on-site hours reported
Requirement for container labels.
Pleasanton Plant · 040192430 CFR 47.41(a)(1) · $151.00 proposed penalty
Requirement for container labels.
Pleasanton Plant · 040192430 CFR 47.41(a)(2) · $151.00 proposed penalty
Brakes.
Pleasanton Plant · 040192430 CFR 56.14101(a)(2) · $151.00 proposed penalty
Regular Safety and Health Inspection
Durbin Plant · 040173412.0 on-site hours reported
Regular Safety and Health Inspection
Pleasanton Plant · 040192416.8 on-site hours reported
Seat belts for haulage trucks.
PALMDALE PLANT · 040212530 CFR 56.14131(a) · $151.00 proposed penalty
Regular Safety and Health Inspection
PALMDALE PLANT · 04021258.5 on-site hours reported
Regular Safety and Health Inspection
Lake Herman Quarry · 040072610.0 on-site hours reported
Machinery
Pleasanton Plant · 0401924No dys awy frm wrk,no rstr act
Accident narrative
ON 9-22-25 EMPLOYEE REPORTED HAVING A FOREIGN BODY IN EE'S (R) EYE FROM TORCHING HOLES ON A NEW CLAD INSTALL ON 9-19-25. THE FOREIGN BODY WAS REMOVED IN THE EMERGENCY ROOM ON 9-22-2025. EE WAS PRESCRIBED EYE DROPS AND WAS RELEASED TO FULL DUTY SAME DAY.
Impoundment Spot Inspection
San Emidio Plant · 04018001.0 on-site hours reported
Moving machine parts.
West Broadway · 020226130 CFR 56.14107(a) · Significant and substantial (S&S) · $1,219.00 proposed penalty
Housekeeping.
West Broadway · 020226130 CFR 56.20003(a) · $151.00 proposed penalty
Regular Safety and Health Inspection
Corona Plant · 040509513.3 on-site hours reported
Regular Safety and Health Inspection
West Broadway · 020226115.5 on-site hours reported
Regular Safety and Health Inspection
PENA BLANCA · 29017718.8 on-site hours reported
Guarding electrical connections and resistor grids.
PENA BLANCA · 290177130 CFR 56.12023 · $151.00 proposed penalty
Regular Safety and Health Inspection
SUN CITY PLANT · 02006326.3 on-site hours reported
Construction and maintenance of guards.
SUN CITY PLANT · 020063230 CFR 56.14112(a)(1) · $151.00 proposed penalty
Housekeeping.
SUN CITY PLANT · 020063230 CFR 56.20003(a) · $151.00 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.