On Wednesday, July 10, 2019, at 5:22 a.m., PDT, a westbound Union Pacific Railroad Company (UP) freight train, MNPWCB-08 (Train 1), traveling at a recorded speed of 35 mph, derailed 32 loaded bi-level autorack cars. The derailment occurred at Milepost (MP) 432.8 on the UP's Caliente Subdivision, Rocky Mountain Service Unit, 27 miles south of Caliente, Nevada. Caliente is located approximately 150 miles northeast of Las Vegas, Nevada. The train consisted of 5 locomotives, 3 on the head end and 2 cut-in mid-train as the Distributed Power Units (DPU), with 179 loads and 3 empties. Train 1 had 20,572 trailing tons and was 12,927 feet long.