UP's Electronic Brake test train crosses the Puyallup River on it's way to join the BNSF Seattle Sub at CP Reservation, a few hundred feet away. The mighty Puyallup river is brown with mud, after flowing from it's source, Mt. Rainier, seen in the background. On it's way from the Volcano to the Sound, it flows under 18 bridges. UP's bridge is one of four railroad bridges over the river.