Abstract: At 2:15 p.m. on April 5, 2017, Employee #1, Coworker #1 (a welding foreman), and five additional Coworkers, employed by a construction company specializing in the utilities and communications industries, were performing pipeline work for a utility company. They were at a desert location and working inside a trench box, preparing to weld together two sections of of pipe using a welding machine. Employee #1 was operating a side-boom tractor to lower the pipes into the trench. Coworker #1 instructed the six employees in the trench to exit the trench, because he felt the pipe moving. All employees except Employee #1 successfully exited. Employee #1, as he attempted to exit, was pinned between the shifting pipe and the trench box. Emergency services were called, and Employee #1 was transported to the hospital. He was admitted and treated for multiple fractured ribs.