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This bridge was destroyed in Pittsburgh's Great Fire of 1845. The second bridge on the site was a wire rope suspension bridge built by John A. Roebling. Increases in bridge traffic and river traffic eventually made the lightly built bridge with eight short spans inadequate.
In 1859, the second Sixth Street Bridge was built by John A. Roebling. This was his third and final bridge in Pittsburgh. His eldest son Washington Roebling worked with him on the bridge after completing his degree in engineering. This bridge had two main spans of 343 feet (105 m), with shore spans of 179 feet (55 m). [3]
The Allegheny Aqueduct was John A. Roebling's first wire cable suspension bridge. [1] It was built in 1844 near the later Fort Wayne Railroad Bridge as a replacement for a wooden covered bridge aqueduct over the Allegheny River in Pittsburgh, part of the Pennsylvania Canal.
John Augustus Roebling (born Johann August Röbling; June 12, 1806 – July 22, 1869) was a German-born American civil engineer. [1] He designed and built wire rope suspension bridges, in particular the Brooklyn Bridge, which has been designated as a National Historic Landmark and a National Historic Civil Engineering Landmark.
Roebling's Delaware Aqueduct, also known as the Roebling Bridge, is the oldest existing wire suspension bridge in the United States. [1] It runs 535 feet (163 meters) over the Delaware River , from Minisink Ford, New York , to Lackawaxen, Pennsylvania .
Eighteen of Pittsburgh's large bridges are visible in this aerial photo The bridges of Pittsburgh play an important role in the city's transportation system. Without bridges, the Pittsburgh region would be a series of fragmented valleys, hillsides, river plains, and isolated communities. A 2006 study determined that, at the time, Pittsburgh had 446 bridges, though that number has been disputed ...
A pair of Pittsburgh-area bridges reopened Saturday morning after 26 barges broke loose the previous night and floated uncontrolled down the Ohio River, damaging a marina, authorities said.
The bridge was then rebuilt in 1846 in an updated, wire rope Suspension Bridge construction, designed by John A. Roebling. The Liberty Bridge was built in 1928 and was designed by George S. Richardson. This bridge, which crosses over the South Side area, connects downtown Pittsburgh to the Liberty Tunnel.