Abstract: On March 28, 2011, Employee #1, the general contractor superintendent, was using a laser transit and taking grade measurements in an open area as grading and rolling operations were occurring nearby. He was wearing a high visibility vest. The employees in the area, who were operating heavy equipment were a site grading subcontractor, who was operating a Deere 450J LGP Dozer and the site grading subcontractor superintendent, who was operating a Hamm 3307 Roller. Employee #1 made eye contact with the roller operator and walked backwards from the moving roller. He was then struck by the bull dozer. Employee #1 sustained ankle and pelvis fractures, which caused internal bleeding. He was transported to a medical center, where he was hospitalized.