Federal Railroad Administration, Office of Safety Headquarters Assigned Accident Investigation Report HQ-2006-65, Union Pacific (UP), St. Mary's, Kansas, July 17, 2006

摘要

At 11:05 a.m. CDT, July 17, 2006, eastbound Union Pacific (UP) loaded coal Train Symbol CWECSH-12 operating at a recorded speed of 40 mph, derailed 29 cars near St. Marys, Kansas. The derailed cars were the 26th thru 54th from the head-end locomotive consist. The estimated damages were $1,464,440 to equipment and $99,095 to track. There was no hazmat release and no injuries. The weather was clear and hot, with a temperature of 100 F. Thermal misalignment of the track caused the derailment. This location was lined earlier in the day by UP track maintenance forces but the appropriate speed restriction/track compaction measures were not effective at preventing the derailment.