Abstract: At 2:15 p.m. on September 30, 2016, the company owner was operating a CAT 323FL trackhoe. They reached a point where Employee #1 entered the excavation to locate a water valve that they were going to tie into. A small collapse happened and buried Employee #1 to his knees. At this point Employee #2 and Employee #3 entered the excavation to dig Employee #1 out. Right then a second collapse happened and buried Employee #2 to mid-stomach and Employee #3 to mid-chest. More crew members ran over and started digging the employees out. Employee #2 died before he was rescued, Employee #3 was rescued and taken to the hospital. Employee #1 was able to dig himself out and did not need any medical attention. The dirt was quite wet and saturated. The excavation at the time of the inspection measured 22' x 16'. Trench box and ladder were on site but not used at the time of the accident.