Abstract: Employees #1 and #2 were placing a scaffold plank over a whitewater chest to provide decking from which they could work on some overhead pipes. The scaffold planks, 2 in. by 12 in. by 18 ft scaffold grade boards, were placed on horizontal pipes approximately 5 in. above the chest. The planks were supported only by the pipes, and the pipes were supported by steel hangers. Employees #1 and #2 were laying felt over the decking to prevent debris from the work platform from falling into the chest. They were working side by side when, according to a witness, a hanger broke, causing an 8 ft area of scaffold planks under the employees to collapse. When the hanger broke, the pipe on which the scaffold planks were resting also collapsed. Employees #1 and #2 fell into the 6 ft deep whitewater chest, which contained 127 degree water. Employee #1 was pulled out by a witness but he died. Employee #2 had to be pulled out by a cord with the help of other employees; he was hospitalized with burns.