About 11:10 AM, the Sioux County Sheriff’s Office received a report of a construction accident that occurred near the intersection of 350th Street and Grant Avenue, four miles northwest of Sioux Center.
It was reported that a dirt trench had collapsed on an employee of L.A. Carlson Contracting, from Merrill, IA, who were working at that location. Sioux Center Fire and Ambulance crews were dispatched to the scene along with sheriff’s deputies.
Rescue crews were able to extricate the victim, 20-year-old Nathaniel Christiansen from Sioux City. He was transported by Sioux Center Ambulance to the Sioux Center Hospital. Christiansen was later transferred to Mercy Medical Center in Sioux City by Mercy Air Care.