CalMat Co. safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Impoundment Spot Inspection
Pleasanton Plant · 04019243.8 on-site hours reported
Spot Inspection
Pleasanton Plant · 04019240.8 on-site hours reported
Impoundment Spot Inspection
PALMDALE PLANT · 04021251.0 on-site hours reported
Spot Inspection
VAL VISTA - CITRUS GROVE 150 · 02028911.3 on-site hours reported
Housekeeping.
West Plant · 020216630 CFR 56.20003(a) · $366.00 proposed penalty
Regular Safety and Health Inspection
West Plant · 02021669.5 on-site hours reported
Housekeeping.
West Plant · 020216630 CFR 56.20003(a) · $151.00 proposed penalty
Extinguisher recharging or replacement.
West Plant · 020216630 CFR 56.4203 · $151.00 proposed penalty
Spot Inspection
LEXINGTON QUARRY · 040094612.3 on-site hours reported
Spot Inspection
Napa Quarry · 04000239.5 on-site hours reported
Spot Inspection
Pleasanton Plant · 04019244.5 on-site hours reported
Regular Safety and Health Inspection
RELIANCE PLANT · 040320011.3 on-site hours reported
Special Emphasis Programs
Lake Herman Quarry · 04007261.8 on-site hours reported
Horns and backup alarms.
San Emidio Plant · 040180030 CFR 56.14132(a) · Significant and substantial (S&S) · $366.00 proposed penalty
Safety defects; examination, correction and records.
San Emidio Plant · 040180030 CFR 56.14100(a) · Significant and substantial (S&S) · $818.00 proposed penalty
Parking procedures for unattended equipment.
San Emidio Plant · 040180030 CFR 56.14207 · $151.00 proposed penalty
Storage facilities.
San Emidio Plant · 040180030 CFR 56.4430(b) · $151.00 proposed penalty
Electrical conductors.
San Emidio Plant · 040180030 CFR 56.12004 · $151.00 proposed penalty
Regular Safety and Health Inspection
San Emidio Plant · 040180029.0 on-site hours reported
103 (g) Written Notification Hazard Complaint Inspectio
Napa Quarry · 04000233.5 on-site hours reported
New task training.
LEXINGTON QUARRY · 040094630 CFR 46.7(a) · $168.00 proposed penalty
Regular Safety and Health Inspection
VAL VISTA - CITRUS GROVE 150 · 02028913.3 on-site hours reported
Regular Safety and Health Inspection
LEXINGTON QUARRY · 04009466.3 on-site hours reported
Impoundment Spot Inspection
San Emidio Plant · 04018001.5 on-site hours reported
Slip or fall of person
Durbin Plant · 0401734Days restricted activity only
Accident narrative
On 6/13/25 employee received medical treatment in ER for a reopening of a surgical incision. While employee was inspecting a trench, the tripped on leveling rake and fell on right knee, reopening a surgical incision from a personal knee surgery. Employee required surgery, was released from the hospital on 6/15/25, placed on restricted duty on 6/16/25 which is being accommodated
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.