HANDLING OF MATERIALS at CalPortland Company
Employee pulled a transmission which had been lowered and was resting on a jack with casters out from underneath an on-highway dump truck. Employee woke the next day stating EE was sore and sneezed at which time EE felt a ""pop"" in the left side of EE's abdomen. Employee sought medical attention and has a strain / possible minor rib fracture.
U.S. Mine Safety and Health Administration