Abstract: At 11:30 a.m. on April 24, 2019, Employee #1, employed by a pipeline construction company, was operating a Caterpillar 572R Series 2 Pipelayer, Serial Number KJL00674. The task was to transport pipe uphill using the pipelayer and to lay the pipe inside a previously excavated trench. As the operator was tracking uphill, the load began to swing, because it was not secured with a tag line. When the swing became uncontrollable, the pipelayer lifted off the ground and rolled backward approximately 300 feet. The employee was wearing his seatbelt and stayed in the cab. The employee was transported to the hospital and admitted for treatment of traumatic head injury and multiple bone fractures.