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The Alco C855 was Union Pacific's montrous experimental Century model developed in 1964 and able to produce 5,500 horsepower.  It had numerous flaws and was retired by 1972.

The Alco was Union Pacific's montrous experimental Century model developed in 1964 and able to produce horsepower. It had numerous flaws and was retired by

RailPictures.Net Photo: SP 1002 Southern Pacific Railroad Alco Slug at Bloomington , California by Craig Walker

Net Photo: SP 1002 Southern Pacific Railroad Alco Slug at Bloomington , California by Craig Walker

Centennials: Name given to Union Pacific's EMD DDA40X locomotives. World's most powerful diesel locomotives, delivered in 1969, the year of Union Pacific's centennial.

Centennials: Name given to Union Pacific's EMD locomotives. World's most powerful diesel locomotives, delivered in the year of Union Pacific's centennial.

UP 85B Description: UP 85B was built in 6/64 and retired in 10/79. Photo Date: 5/26/1974 Location: Barstow, CA Author: Ron Hawkins Categories: Roster Locomotives: UP 85B(DD35)

UP Description: UP was built in and retired in Photo Date: Location: Barstow, CA Author: Ron Hawkins Categories: Roster Locomotives: UP

Union Pacific GE 8500 - Cheyenne, Wyoming, 1965. In 1955, Union Pacific ordered a new turbine-electric, the world's most powerful locomotive. Each would be two units plus a fuel tender, rated at 8,500 horsepower (6,300 kW). The A unit contained the control cab and an auxiliary diesel engine generator. The B unit carried the turbine and main generators to provide electricity to the traction motors on both the A and B units. The turbine was a new design GE Frame 5 simple cycle gas turbine with…

Union Pacific GE 8500 - Cheyenne, Wyoming, In Union Pacific ordered a new turbine-electric, the world's most powerful locomotive. Each would be two units plus a fuel tender, rated at horsepower kW). The A unit contained the contro

The last functional/running EMD DD40AX Locomotive owned/operated by Union Pacific Railroad; Railfest 2011.  Largest diesel locomotive ever built in the United States of America.

The last functional/running EMD Locomotive owned/operated by Union Pacific Railroad; North Platte, NE,Railfest Largest diesel locomotive ever built in the United States of America.

UP GP7 125   Description:  Running in proper long-hood forward fashion (at least for a UP GP7); UP 125 leads five other Geeps on a southbound train through Clearfield UT in Jun 1976. It was retired by UP in 10/77 and sold to PNC; it would end up with Iowa Interstate and Kansas Southwestern.   Photo Date:  6/1/1976  Location:  Clearfield, UT   Author:  Rick Morgan  Categories:    Locomotives:  UP 125(GP7)

UP 125 Running in proper long-hood forward fashion (at least for a UP UP 125 leads five other Geeps on a southbound train through Clearfield UT in Jun It was retired by UP in and sold to PNC; it would end up with Iowa Interstate and Kansas Southwestern.

Union Pacific GE U50C 5018, Denver, Colorado, December 18, 1971. Bruce Black photo.

Union Pacific GE U50C 5018

Union Pacific GE U50C 5018, Denver, Colorado, December 18, 1971. Bruce Black photo.

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