the only steam locomotive to never be retired in 1944 Union Pacific received the northern type steam locomotive from Alco a class of 10 locomotives designed to pull passenger trains at 90 miles an hour UP 844 was the last steam locomotive delivered to the Union Pacific Railroad and exclusively pulled passenger trains but from 1957 to 1959 844 was reassigned the fast Freight Service saved from scrapping in 1960 number 844 was chosen for rebuilding and is now used on Excursion trains which explains why 844 was