Railroad Accident Report: Collision of Union Pacific Railroad Train MHOTU-23 With BNSF Railroad Company Train MEAP-TUL-126-D With Subsequent Derailment and Hazardous Materials Release

About 5:03 a.m., central daylight time, on Monday, June 28, 2004, a westbound Union Pacific Railroad freight train traveling on the same main line track as an eastbound BNSF Railway Company freight train struck the midpoint of the 123-car BNSF train as the eastbound train was leaving the main line to enter a parallel siding. The accident occurred at the west end of the rail siding at Macdona, Texas, on the UP's San Antonio Service Unit.