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Union Pacific 3985 is a four-cylinder simple articulated 4-6-6-4 "Challenger"-type steam locomotive built in July 1943 by the American Locomotive Company (ALCO) of Schenectady, New York, for the Union Pacific Railroad. No. 3985 is one of only two Challengers still in existence and the only one to have operated in excursion service.
No. 3985 was restored in 1981 and used by Union Pacific on excursions until October 14, 2010, when mechanical problems forced it from service. It was officially retired from UP excursion service in January 2020. In April 2022, Union Pacific donated No. 3985 to the RRHMA and sent it to the RRHMA's workshops in Silvis, IL in November of that year.
Union Pacific Challenger No. 3985 is an example of a 4-6-6-4 locomotive. In the Whyte notation for classifying steam locomotives by wheel arrangement, a 4-6-6-4 is a railroad steam locomotive that has four leading wheels followed by two sets of six coupled driving wheels and four trailing wheels. 4-6-6-4's are commonly known as Challengers.
Undergoing restoration to operating condition Oregon Rail Heritage Center in Portland, Oregon: Built as Oregon Railroad and Navigation Company 197, renumbered as UP 3203 and is being restored as 197. 3206: P-1 4-6-2 3977: June 1943 American Locomotive Company (ALCO) 4664-4 4-6-6-4: Static display Cody Park in North Platte, Nebraska: 3985: July 1943
[14] [15] Wasatch also assisted with work on the Union Pacific Steam Program, aiding in the 2006 renovation of the two auxiliary water tender's used behind No. 844 and No. 3985. [16] Former Union Pacific Steam Program manager Steve Lee joined Wasatch in 2010, and he participated in such projects as relocation of UP switcher No. 4420 to a ...
The Union Pacific heritage fleet includes commemorative and historic equipment owned by the Union Pacific Railroad.The fleet currently consists of two historic steam locomotives, three historic diesel locomotives, seventeen modern diesel locomotives in historic or commemorative paint schemes and nearly four dozen passenger cars used on office car specials and excursion trains.
Additionally, No. 3985's original tender, No. 25-C-311, was connected to No. 4014 to meet the restoration deadline. [48] [49] In January 2020, Union Pacific officials announced that the UP Steam Team would operate just two steam locomotives—Nos. 844 and 4014—and would retire No. 3985, which was in poor mechanical condition. [47] [48]
Two of Union Pacific's Challengers survived into preservation. Challenger #3985 was the largest operational steam locomotive in the world until the restoration of UP 4014. It was taken out of service in October 2010 due to mechanical problems and retired from the Union Pacific's excursion program in January 2020.