Union Pacific 3977

Union Pacific 3977

Type and origin Power type Steam Builder American Locomotive Company Serial number 70160 Build date June 1943

Specifications Configuration: ​  • Whyte 4-6-6-4 Gauge 4 ft 8 1⁄2 in (1,435 mm)

Career Operators Union Pacific Numbers 3977 (coal burner, 1943), 3710 (oil burner, 1952), 900079 (MOW snow melter, 1961) renumbered back to 3977 for display in North Platte 1968. Nicknames "Challenger" Retired 1968 Disposition On static display

Type and origin
Power type	Steam
Builder	American Locomotive Company
Serial number	70160
Build date	June 1943

Specifications
Configuration:	​
• Whyte	4-6-6-4
Gauge	4 ft 8 1⁄2 in (1,435 mm)

Career
Operators	Union Pacific
Numbers	3977 (coal burner, 1943), 3710 (oil burner, 1952), 900079 (MOW snow melter, 1961) renumbered back to 3977 for display in North Platte 1968.
Nicknames	"Challenger"
Retired	1968
Disposition	On static display

Coordinates: 41°08′52″N 100°45′11″W / 41.147853°N 100.753113°W / 41.147853; -100.753113

Union Pacific 3977 or UP 3977 is a 4-6-6-4 steam locomotive originally owned by Union Pacific Railroad. Its counterpart, Union Pacific 3985, is the largest operating steam locomotive in the world. 3977 was donated to the City of North Platte, Nebraska for display on October 19, 1968. It is on display in Cody Park, next to EMD DDA40X #6922.

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