after which twin engine designs became preferred. Service life The rebuilt train was re-delivered on May 23, 1935, and after some test runs was dedicated as the first City of Portland on June 5 at the Portland Rose Festival, entering service between Portland and Chicago the following day. It remained in that service until 1938 when it was replaced by the M-10002 trainset, reassigned from the City of Los Angeles. After serving on the Portland-Seattle run it was retired in June 1939; the City of Denver trains needed more power and Union Pacific cannibalized M-10001 and M-10004. By December the diesel engine, generator, trucks, and the steam generator from the RPO/baggage car were removed and installed in a new carbody to become the third power unit on the CD-07 set for the City of Denver. Two sleeping cars were refurbished and added to the former M-10004 car set, which served as a spare City of Denver set, then in 1941 was assigned to service as City of Portland, powered by an EMC E3 locomotive set. The remainder of the train was stored until August 13, 1941, when it was sold for scrap. References Further reading Strack, Don (2001) Union Pacific Diesel Story, 1934–1982, Part I. Retrieved on December 25, 2004. Kratville, William W., and Ranks, Harold E., The Union Pacific Streamliners, 1974 External links North American streamliner trains Articulated passenger trains Union Pacific Railroad locomotives Diesel multiple units of the United States Diesel multiple units with locomotive-like power cars Night trains of the United States Scrapped locomotives