Western Pacific GP40 3506 and WP U23B's 2264 and 2254 are eastbound at Williams Loop near Quincy, California July 02, 1979. No photographer listed on slide.

Westbound wreck train has brought out the big hook and is heading home.

GP40 3506 brings a hot Overland Mail West toward the control signal at the east end of Stockton Yard, where it will hold the main for a crew change instead of entering the yard.