I found this image from July 1993 of the flooding of the bridge.
http://www.stltoday.com/image_7acd3baa-a31b-53b5-af01-172302d6c877.html
This bridge was completely submerged during the floods of April 1973 and again during the "Great Flood of 1993". The latter event is chronicled in the book, "High and Mighty - The Great Flood of 1993" published by Andrew and McMeel Publishing Company and sold by the St. Louis Post-Dispatch at its downtown headquarters on Tucker Boulevard.