The EMD GP35 is a 4-axle diesel-electric locomotive built by General Motors Electro-Motive Division between July 1963 and December 1965 and by General Motors Diesel between May 1964 and January 1966. The locomotive's power was provided by an EMD 567D3A 16-cylinder engine which generated 2,500 horsepower. 1251 examples of this locomotive model were built for American railroads, 26 were built for Canadian railroads and 57 were built for Mexican railroads.
#612 came to the WN second hand from the Burlington Northern. It begin life as Great Northern #2518.