There are about 630,000 bridges in the United States, ranging from impressive new structural creations like Margaret Hunt Hill bridge in Dallas to deteriorating slabs of concrete in desperate need repair. It's that last growing group of bridges, ports, and highways that represent the slowing decaying infrastructure that was once the best in the world.
via Gizmodo http://ift.tt/1rpnOcd http://ift.tt/1rcZv6T
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