bridges

    Top: Regional: North_America: United_States: Oregon: Arts_and_Entertainment: Architecture: Bridges:

• Top/Science/Technology/Structural Engineering/Bridge
• Top/Science/Technology/Structural Engineering/Bridge/History/Historic Bridges
• Top/Science/Technology/Structural Engineering/Bridge/History/Historic Bridges/Covered

• - History and county by county guide, with photographs and descriptions. Also an explanation of truss types, with diagrams.
  
• - Oregon can truly trace its history with the exploration of its more than 50 historic covered bridges. Provides information regarding each of these historic landmarks.
  
• - Photos and descriptions of Portland, Oregon's wide variety of river bridges.
  
• - Oregon Department of Transportation offers photographs and brief histories of a selection of the over 50 surviving spans in the state.