Abstract: At 1:00 p.m. on August 1, 2017, Employee #1, employed by a drilling company, was operating a drilling rig in a 6-foot excavation at a multiemployer construction site. He was installing a 1.5-inch drain pipe horizontally into the face of the excavation. He was standing between the drilling rig and the face of the excavation when the excavation caved in. Employee #1 was buried/trapped in water and mud, and he was compressed against the drilling rig's control panel and collapsed soil and rock. Emergency services were called. Employee #1 was extracted from the cave-in and transported to the hospital. He was admitted and treated for fractured ribs and blood on the brain.