AFTER EMPLOYEE LOADED A DOZER ONTO THE LOWBOW HE STARTED TO WALK DOWN THE RAMP AT THE BACK OF THE LOWBOY. HIS LEFT FOOT SLIPPED INTO AN OPENING (HOLE) ON THE DOVETAIL OF THE TRAILER. HE FELL F ORWARD, BREAKING HIS LEG. HE HAS HAD SURGERY ON HIS LEG AND IS OFF WORK AT THIS TIME.