CalMat Co. safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Impoundment Spot Inspection
PALMDALE PLANT · 04021251.0 on-site hours reported
Handling of materials
PLACITAS · 2901475Days restricted activity only
Accident narrative
On 05-29-25 employee alleges a strain to the left lower back when operating a CAT 769D haul truck. EE states that the initial left lower back strain occurred on 05-28-25. While the employee was attempting to move a pallet with a pallet jack. On 05-30-25 employee was treated by a MD for a strain to the left lower back, resulting in modified work activity.
New task training.
Lake Herman Quarry · 040072630 CFR 46.7(a) · $168.00 proposed penalty
Requirement for container labels.
Lake Herman Quarry · 040072630 CFR 47.41(a)(1) · $151.00 proposed penalty
Regular Safety and Health Inspection
Lake Herman Quarry · 040072611.5 on-site hours reported
Spot Inspection
Sanger Plant · 04019373.0 on-site hours reported
Impoundment Spot Inspection
Pleasanton Plant · 04019246.0 on-site hours reported
Construction and maintenance of guards.
Chula Vista Quarry · 040408030 CFR 56.14112(a)(1) · $366.00 proposed penalty
Attachment of trailing cables.
Chula Vista Quarry · 040408030 CFR 56.12038 · $151.00 proposed penalty
Electrical conductors.
Chula Vista Quarry · 040408030 CFR 56.12004 · Significant and substantial (S&S) · $245.00 proposed penalty
Inspection and cover plates.
Chula Vista Quarry · 040408030 CFR 56.12032 · $151.00 proposed penalty
Regular Safety and Health Inspection
Chula Vista Quarry · 040408027.0 on-site hours reported
Regular Safety and Health Inspection
Queen Creek Stone · 02033424.0 on-site hours reported
Inspection.
Pleasanton Plant · 040192430 CFR 56.4201(a)(2) · $267.00 proposed penalty
Parking procedures for unattended equipment.
Pleasanton Plant · 040192430 CFR 56.14207 · $151.00 proposed penalty
New task training.
Sanger Plant · 040193730 CFR 46.7 · $168.00 proposed penalty
High-pressure hose connections.
Sanger Plant · 040193730 CFR 56.13021 · $151.00 proposed penalty
Regular Safety and Health Inspection
Sanger Plant · 040193713.3 on-site hours reported
Regular Safety and Health Inspection
Pleasanton Plant · 040192426.3 on-site hours reported
Compliance Follow-up Inspection
San Bernardino Plant · 04019841.0 on-site hours reported
Regular Safety and Health Inspection
Durbin Plant · 040173413.5 on-site hours reported
Berms or guardrails.
PALMDALE PLANT · 040212530 CFR 56.9300(b) · $151.00 proposed penalty
Regular Safety and Health Inspection
PALMDALE PLANT · 040212514.0 on-site hours reported
Regular Safety and Health Inspection
San Bernardino Plant · 040198412.8 on-site hours reported
Housekeeping.
San Bernardino Plant · 040198430 CFR 56.20003(a) · Significant and substantial (S&S) · $165.00 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.