Bridge Documentation Sites
- Historic Bridges of Michigan and Elsewhere
- Old Ohio Bridges
- Historic Bridges of the United States
- Bridges and Tunnels of Allegheny County and Pittsburgh, PA
- Bridgemeister
- World's Highest Bridges
- Chicago Loop Bridges
- Structurae
- The Biemiller Ice & Coal Co.
Bridge Preservation and Restoration Sites
- Historic Bridge Foundation
- Pittsburgh History & Landmarks Foundation
- VJM Metal Craftsman, LLC
Bridge Photography Sites
Bridge Definition Sites
- Bridge Basics
by Bruce Cridlebaugh
- Bridges and Fords
by Allison Fleming, Jennifer Block, and Peejay Tubongbanua