Allegheny Aqueduct (Pittsburgh)

40.448249 - 79.996068Koordinaten: 40 ° 26 ' 53.7 "N, 79 ° 59' 45.8 " W

Allegheny River

The Allegheny Aqueduct was a canal bridge, with the Pennsylvania Canal was passed over the Allegheny River in downtown Pittsburgh, Pennsylvania, United States. The Allegheny Aqueduct was known as the first built by John A. Roebling Suspension Bridge. It was also the first suspension bridge constructed as a canal bridge.

The first Allegheny Aqueduct was built in 1835 as part of the Pennsylvania Canals wooden bridge over which the trains running between Philadelphia and Pittsburgh barges were able to drive directly into the center of Pittsburgh. In the winter of 1844, this bridge was destroyed by ice conditions.

In August 1844 John A. Roebling was awarded the contract for the construction of a new canal bridge in the form of a suspension bridge according to his own plans and for the price of $ 62,000. Roebling had by then indeed made a name as a manufacturer of wire ropes, but never built a bridge. The made of wood, about 300 m long bridge trough was driven by parallel wire cables that ran over seven brick pylons and were fastened to the banks by means of chains and cast-iron anchor plates in deep stone anchor blocks. In May 1845 trough was first filled with water, then the opening of the bridge took place. After Roebling's detailed records, the cost of the bridge $ 58,297.

After the train had since 1850 continues to spread and thereby also taken over the routes of canals, the bridge was closed in 1861.

Structurae

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