Union Pacific No. 3910 (1936)

Union Pacific No. 3910 renumbered as #3710.

Union Pacific No. 3710 was a 4-6-6-4 "Challenger" type steam locomotive, built by the American Locomotive Company in 1936 for the Union Pacific Railroad and originally #3910 and later to #3810.

It was used for freight service on the Union Pacific Railroad, but it was occasionally used on passenger service as well.

In 1959, it was withdrawn from active service and later the same year, the locomotive was quickly cut up for scrap.

Trivia

• It was renumbered to #3710 in 1949 because of a coal strike.
• In 1959, the other No. 3710 (Union Pacific No. 3977) was sent to Omaha, Nebraska, to work at the various terminals in Bailey Yard serving as a snowplow alongside Union Pacific No. 844.
• This is one of a few challengers that was renumbered because of a coal strike.

List of Union Pacific Challenger Locomotives
CSA-1:	3900 (3800) • 3901 (3801) • 3902 (3802) • 3903 (3803) • 3904 (3804) • 3805 • 3906 (3806) • 3807 • 3808 • 3909 (3809) • 3910 (3810) • 3911 (3811) • 3912 (3812) • 3913 (3813) • 3914 (3814)
CSA-2:	3815 • 3816 • 3817 • 3918 (3818) • 3819 • 3820 • 3821 • 3822 • 3823 • 3822 • 3823 • 3824 • 3825 • 3826 • 3827 • 3828 • 3829 • 3830 • 3831 • 3832 • 3833 • 3834 • 3835 • 3836 • 3837 • 3838 • 3839
4664-3:	3950 • 3951 • 3952 • 3953 • 3954 • 3955 • 3956 • 3957 • 3958 • 3959 • 3960 • 3961 • 3962 • 3963 • 3964 • 3965 • 3966 • 3967 • 3968 • 3969
4664-4:	3975 • 3976 • 3977 • 3978 • 3979 • 3980 • 3981 • 3982 • 3983 • 3984 • 3985 • 3986 • 3987 • 3988 • 3989 • 3990 • 3991 • 3992 • 3993 • 3994 • 3995 • 3996 • 3997 • 3998 • 3999
4664-5:	3730 • 3731 • 3732 • 3733 • 3734 • 3735 • 3736 • 3737 • 3738 • 3939 • 3740 • 3741 • 3742 • 3743 • 3744 • 3745 • 3746 • 3747 • 3748 • 3749
Clinchfield Railroad:	Locomotive Type
Extinct:	Fetter Challengers
Excursion Star:	3967 • 3985
Preserved:	3977 • 3985