The Delaware and Hudson Canal was in operation between 1828 and 1898, bringing coal from Honesdale, Pennsylvania 108 miles to the Hudson River at Kingston, NY, then down to New York City. This suspension aqueduct was designed and built by John Augustus Roebling in 1847 to carry canal boats across the Delaware at a higher, more efficent level. After the closing of the canal in 1898, the aqueduct continued service for 70 years as a toll bridge, before being purchased and restored by the National Park Service. Of course Roebling went on to build the Brooklyn Bridge. Some links: for the Delaware Aqueduct: http://memory.loc.gov/cgi-bin/query/D?hh:17:./temp/~ammem_V0xc::
and the Brooklyn Bridge:
http://memory.loc.gov/cgi-bin/query/D?hh:19:./temp/~ammem_V0xc::