Executive Summary
Executive Summary
On July 18, 2013, at 8:29 p.m. eastern daylight time, northbound CSX Transportation (CSX) train Q70419, derailed on the Metro-North Railroad (Metro-North) Hudson Line at milepost (MP) 9.99 on main track 2.1 The train consisted of 2 locomotives and 24 modified flat cars. Each flat car was loaded with 4 containers containing municipal refuse. The 11th through 20th cars derailed.
Probable Cause
Probable Cause
The National Transportation Safety Board determines that the probable cause of the accident was excessive track gage due to a combination of fouled ballast, deteriorated concrete ties, and profile deviations resulting from Metro-North's decision to defer scheduled track maintenance.