Union Pacific had only two Alco Century 855-A 5500hp, numbered 60 and 61, Date Built 6/64, sold to Houston Armature Works and scrapped, 11/71. No photographer listed on slide.

One of three Alco C855 built for the UP, two A's and one B. Here is one of them handling a train through Nebraska. These units put out 5500 hp versus EMD's and GE's offering of 5000 at the time. T... (more)

Alco's largest diesel engine. Only two A's and one B unit were built. All for UP. This loco had an output of 5500 hp which could have given an edge over GE's 5000 hp U50 and EMD's DD35. But Alco's... (more)

Gas turbine electric 61 pulls a freight consisting of boxcars. No photographer listed on slide.