UP 4106 at Missouri Valley, IA, 5/21/02.

UP 7502 near Fremont, NE, 5/21/02.

UP 110 at Sioux City, IA, 5/6/02.

The Union Pacific is winding down a major locomotive upgrading project with 1000's of new locomotives. As a result, 2 pages are required to show the variety of UP power today.

UP 8397 at St Paul, MN, 3/06/06. This is the newest EMD  locomotive model.

UP 8065 at Lexington, NE, 5/20/02.