Eriksson Technologies, Inc.
Science, Technology, Structural Engineering, Bridge - Eriksson Technologies, Inc.. Offers prestressed concrete girder design programming.
https://www.eriktech.com/
Mackinac Bridge Authority
Science, Technology, Structural Engineering, Bridge - Mackinac Bridge. Includes historical background about the bridge, which connects the upper and lower peninsulas of Michigan.
https://www.mackinacbridge.org/
Confederation Bridge
Science, Technology, Structural Engineering, Bridge - Confederation Bridge. The longest bridge over ice covered waters in the world, joining Borden-Carleton, Prince Edward Island and Cape Jourimain, New-Brunswick.
https://www.confederationbridge.com/
Ambassador Bridge
Science, Technology, Structural Engineering, Bridge - Ambassador Bridge. Features a substantive history, bridge facts, and current data.
https://www.ambassadorbridge.com/
Bridges Of The Nineteenth Century
Science, Technology, Structural Engineering, Bridge - Digital Bridges. Online library of historical bridge design manuals and books from Lehigh University.
http://bridges.lib.lehigh.edu/