On August 15, 2016, at approximately 11:00 a.m., an employee was constructing a storage tank. The employee was standing on grating that surrounded the tank and at a height of approximately 47 to 48 feet. Because there were no railings, the employee wore a full body harness and was tied off to the structure. While he was tightening a bolt, the ratchet slipped off and he fell from the grating. During the fall, his right arm struck the structure, amputating his right ring finger and lacerating his arm. He was hospitalized.