Monday, August 21, 2023

1951,1993 I-70 Belle Vernon Bridge over Monongahela River at Speers, PA

(Bridge Hunter broke Mar 22, 2023; Historic Bridges; Satellite)

"This bridge is a rare example of a suspended deck continuous through truss bridge. The bridge design is noted for looking like a trussed through arch, however because the truss spans that flank the pretend arch span in the center are connected to it such that they form a continuous structure, the bridge does not function as an arch, but rather functions as a continuous through truss bridge with an arched shape. The deck is then connected to the arch-shaped truss via vertical suspenders." [HistoricBridges]

Street View, Jul 2019
 
Street View, Dec 2021

It is the arch-looking bridge behind the K-Truss Speers Viaduct.
Rust Belt Railroading posted via Dennis DeBruler
 
Google search results

This 1950s photo catches the old and new road bridges.
jmohney via Bridge Hunter comment by Ian Anderson
[This web page as some more bridge photos.]

It was silver and rusty in 2006. In fact, it was painted blue between Oct 2016 and Jul 2018.
Street View, Oct 2016

As HistoricBridges explains, the truss members are box beams with "hand holds."
Street View, Aug 2022




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