EE DUMPED LOAD OF STONE WITH HAUL TRUCK BESIDE STOCKPILE. WITHOUT FULLY LOWERING TRUCK BED, EE TRAVELED APPROX 400 FEET TOWARDS AN UNDERPASS. TRUCK BED CAME IN CONTACT WITH OVERPASS, CAUSING EE TO BE JOLTED IN CAB. EE HAD CUTS TO L. WRIST, L. HAND & UNDER LIP ON CHIN AND LOWER GUM; NICKS ABOVE R. EYE & R. EAR; TWO CHIPPED TEETH.