UP 4-6-6-4 #3707 - Union Pacific Challenger         
A dramatic plume of black smoke signals the startup of this Alco-Schenectady 4-6-6-4 Challenger. Built in August of 1944 as UP #3944, renumbered to 3707 in October 1952 when converted from coal to oil fuel, retired in June 1961, Arthur Stensvad photo.
Date: 5/6/1954 Location: Ogallala, NE   Map Show Ogallala on a rail map Views: 656 Collection Of:   Gary Everhart
Locomotives: UP 3707(4-6-6-4)    Author:  Gary Everhart
UP 4-6-6-4 #3707 - Union Pacific Challenger
Picture Categories: Roster,Steam This picture is part of album:  UP 4-6-6-4 Challengers
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