https://historicbridges.org/index.php
Historic Bridges .org
Historic bridges resource with photographs and information for bridges in North America. Includes in-depth articles about types in general.
historic bridges
https://wsdot.wa.gov/construction-planning/protecting-environment/historic-bridges
Historic bridges | WSDOT
Learn about the different types of historic bridges in Washington state, including the locations of the historical bridges and moveable bridges.
historic bridgeswsdot