These are the railroad tracks that cross the Kinzie Street Railroad Bridge. They are a spur line of the Union Pacific Railroad, that branches off from the route of the Union Pacific/North Line about 1 mile north-west of the bridge. The picture shows the railroad tracks to the east of the bridge that have been retired since 2000. Funny how the tracks that were so important and so many things depended on can become abandoned and left alone and practically forgotten already.