(YouTube link)
Russian authorities shut down a seven-kilometer-long bridge over the Volga River in Volgograd last week after it started to wobble. Floodwaters loosened one support, which affected the stability of the entire bridge, which is the longest in Europe Russia. The video is reminiscent of the Tacoma Narrows Bridge just before it collapsed. The Volgograd bridge was completed less than a year ago. Link -via Arbroath
http://www.youtube.com/watch?v=qH16RQ25mP8&feature=related
the sponge concrete that has already been mentioned is completely impossible. COMPLETELY.
this is nothing like the tacoma bridge because that was a suspension bridge not a simple beam bridge like this.