There is a display where the tracks used to come off of the bridge on the Leavenworth side. The bridge tender's building, which was later converted into the Chicago Great Western depot, appears to be in the same location. I posted a current photo of the bridge location in the photo section.
Additional note: The line was abandoned because of Rock Island's bankrupcy and the C&NW purchased their Des Moines to Kansas City route which was much more efficient and is still in use today.
This bridge was torn down in the late 80's when the Chicago & Northwestern Railroad abandoned the line into Leavenworth.