If a bridge is making that much screeching NOISE from the traffic, then there is definitely a lot of metal-to-metal wearing going on, and that metal part won't last more than 5 years before it has to be replaced.
This bridge was actually named the Bernard F. Dickmann bridge. Mr. Dickmann was a Mayor of St. Louis and the Post Master General. The bridge actually goes over the Poplar Street and is now named the Congressman William L. Clay Bridge. Why does everybody refer to as the "Poplar Street Bridge?" There is no actual connection between Poplar Street and the bridge.
