Union Pacific GP35 743 awaits its next call-to-duty on a local out of Colton. The Geep was built in May 1964 by General Motors Electro-Motive Division. (Colton, California – July 20, 1975)

UP 743 and UPY 1072 wait for a crew at dawn

A pair of UP GP-35s idle with their cab at the engine terminal at Central City, Nebraska, in August of 1978.