On 07/25/2018 at approx. 1430 hrs, a Haul Truck Operator, fell approximately 9' to ground while attempting to dismount the Cat 777D EE was operating. EE sustained lacerations to the head and an open compound fracture of the right forearm that required surgery to repair. EE was not able to report to work on EE's next regularly scheduled shift, making this a Lost Time Injury.