Employee was on the ground spotting a dump truck to prepare for dumping a load of fill dirt in excavation area. Employee's back was to the dozer that came up an incline and fatally struck employee from behind.
An employee on the ground level retrieved the tool and climbed 1 to 2 rungs of the ladder to hand the tool to the employee above. The employee appeared to lose consciousness and fell. The witnesses indicated that it appeared the victim was breathing. At 12:01pm, US Silica was informed that the victim had a heart attack and while at the hospital the employee died.