Abstract: Employee #1 was walking from a passageway onto a dirt track area. A dump truck (25 ton capacity) had just started to back up, going south. Employee #1 tried to avoid the backing truck but it struck him and ran him over, killing him. Three factors may have contributed to this accident. Employee #1 was wearing safety glasses with side shields that may have affected his peripheral vision. The area was extremely noisy and Employee #1 may not have heard the weak back-up alarm, which was not operating at design specifications. In addition, the back-up or white reverse light on the truck was missing.