Science, Technology, Structural Engineering, Bridge - Mackinac Bridge. Includes historical background about the bridge, which connects the upper and lower peninsulas of Michigan.
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.
Science, Technology, Structural Engineering, Bridge - Digital Bridges. Online library of historical bridge design manuals and books from Lehigh University.