Union Pacific 5511

Common card · No. 491307

Union Pacific 5511 is a 2-10-2 "Santa Fe" type steam locomotive built by the Baldwin Locomotive Works (BLW) in September 1923 as part of the Union Pacific Railroad's TTT-6 class. While other railroads referred to this wheel arrangement as the “Santa Fe” type, Union Pacific simply categorized it by its wheel configuration—2-10-2—and class. It is the last surviving 2-10-2 of 144 units operated by the UP from 1917 to the end of steam in 1959, and the only complete UP steam locomotive equipped with Young valve gear. The locomotive ran in revenue service until being withdrawn in 1956. Afterwards, it remained in storage in the UP's roundhouse in Cheyenne, Wyoming. In April 2022, Union Pacific announced that No. 5511 was among several pieces of equipment to be donated to Railroad Heritage of Midwest America (RRHMA) in Silvis, Illinois, with plans to rebuild No. 5511 for operational purposes once Challenger No. 3985 is rebuilt. As of 2026, both Nos. 3985 and 5511 are still undergoing operational...

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