Southern Pacific GE U33C 8684 and 8670 at a scrap yard in Fort Worth, Texas.
Very late in the day, a U33C with an L-shaped windshield leads a heavy manifest up the steep grade toward the Loop.
A Southern Pacific westbound ascends Cajon Pass on a snowy December 30, 1974 behind U33C 8684, SD39s 5324 and 5307 and U33C 8686.
A big SP U33C with a "cobra" warning light atop the cab leads a heavy manifest up the steep grade on the approach to the Loop.