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Historic Bridges Over the Allegheny River in Pennsylvania

  Link Details for: Historic Bridges Over the Allegheny River in Pennsylvania
Link Title: Historic Bridges Over the Allegheny River in Pennsylvania Open in a new window
Link URL: http://www.venangoil.com/bridgesallegheny.html
Link Details: Photographs and information on iron and steel truss bridges.
Category: Top : Science : Technology : Structural_Engineering : Bridge : History : Historic_Bridges : North_America : United_States
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Historic Bridges Over the Allegheny River in Pennsylvania