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For the 3.8 miles (6.1 km) downstream to the river, the channel was improved with stone and concrete walls and a similarly lined bottom, affording a 20,000 cu ft/s (570 m 3 /s) capacity for this more heavily developed, lowest section of the creek. Construction of the concrete channel lining was completed in 1967, and control was turned over to ...
George Westinghouse Memorial Bridge in East Pittsburgh, Pennsylvania, carries U.S. Route 30, the Lincoln Highway, over the Turtle Creek Valley near to where it joins the Monongahela River Valley east of Pittsburgh. The reinforced concrete open-spandrel deck arch bridge has a total length of 1,598 feet (487 m) comprising five spans. The longest ...
The horizontal pull of the top cords is resisted by the steel girders along each side of the roadway. The suspension system consists of 14" eye-bars extending from end to end, having two pins on the top of each tower and carrying the roadway by 4" eye-bar suspenders at the panel points.
The Three Sisters are three similar self-anchored suspension bridges spanning the Allegheny River in downtown Pittsburgh, Pennsylvania at 6th, 7th, and 9th streets, generally running north–south. The bridges have been given formal names to honor important Pittsburgh residents: Roberto Clemente (Sixth Street Bridge) Andy Warhol (Seventh Street ...
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 ...
The City of Pittsburgh built six other similar bridges in the 1910s and 1920s, of which only the Larimer Avenue Bridge survives as of 2022. [12] The second bridge during construction in 1922. By the 1970s, the bridge had begun to decay. Chunks of concrete fell from the bridge in 1970, necessitating a temporary closure for repairs. [13]
Construction of new Braddock Dam, started in 1999, was completed in May 2004 using innovative in-the-wet construction techniques. Two prefabricated hollow concrete segments were constructed at an off-site dry-dock and floated into place and set down on a prefabricated foundation system of sheet-pile cut-off walls and large diameter drilled shafts socketed into bedrock.
PA 28 begins adjacent to Downtown Pittsburgh at Anderson Street near the Interstate 279 (I-279)/I-579 interchange and travels north/northeast along the northern bank of the Allegheny River. Until recently the route was a surface street for the first two miles (3.2 km) until the 40th Street Bridge and then an expressway from 40th Street to ...