The Washington Post, 8/17:
Dr. Gridlock
Report: Wheel failure caused May CSX train derailment in Northeast D.C.
A wheel problem may have caused a CSX train derailment in May that spilled chemicals along a busy rail corridor in the District, according to an incident report filed with the Federal Railroad Administration.
SNIP
CSX Transportation said in the report to FRA that it determined the cause of the derailment was a failure in the “journal” portion of an axle on the first car that derailed, 70 cars into the train. Rob Doolittle, a spokesman for CSX, said the broken wheel is being analyzed to evaluate what may have caused the axle to break.
More here.