I can stand, usually on top of the Arch parking lot, and visualize in a horses, carriages, steamboat, Mark Twain & Tom Sawyer world.... this was built.
1867-1874
Men were sent under those supports and the Mississippi River to hand dig sand so the entire support could keep dropping to the bedrock.
The worlds first steel bridge, yet made with old school craftsmanship, sweat and lives
This is a late 1800s equivalent, to me, of the pyramid.
Mark P is right about the politics and economics of the bridge. I do not care. I look at it as a working monument.
"Eads design set a number of precedents in bridge building. It was the world's first true steel bridge, the first to use tubular cord members, and the first to use cantilever support methods exclusively. It was also the first bridge in the United States to make use of pneumatic caissons in the construction of the piers, which were sunk to unprecedented depths. Eads invented a sand pump to remove gravel, sand, and silt from the caissons so that the sinking operation would continue without interruption. The Eads Bridge was the first large bridge to span the Mississippi River and the first to carry railroad tracks."
Readable & concise history & engineering of the bridge-
http://web.mst.edu/~rogersda/umrcourses/ge342/Eads%20Bridge.pdf read more