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The Chicago and North Western Railway's Class ES comprised two coal-burning streamlined 4-6-2 "Pacific" steam locomotives built in 1930 by Alco.

They were built to haul the road's famous "400" express passenger trains, but before they were even delivered the railroad's management decided that streamlined steam was the wrong direction and instead placed orders with General Motors Electro-Motive Division for new diesel locomotives. The displaced ES's instead worked other trains until they were withdrawn from service in 1953 and scrapped. The nine ES's were almost identical in specification and purpose to the CNW ES Class locomotives, and they were built by the same builder at the same time, yet they were different in almost every detail of design.

Other CNW Steam LocomotivesEdit

  • CNW Class D 4-4-2 – A major workhorse of the C&NW, some were used on the Minnesota 400.
  • CNW Class E-2 4-6-2 – Twelve locomotives, four of which were converted to "E-2-a" class and were the original locomotives for the Twin Cities to Chicago 400 before being replaced by EMD E3 diesel units. The remaining eight were converted to "E-2-b" locomotives.

See alsoEdit