A Guide to Oregon Covered Bridges - Oregon Department of Transportation offers photographs and brief histories of a selection of the over 50 surviving spans in the state. - http://www.oregon.gov/ODOT/HWY/BRIDGE/
Oregon's Covered Bridges - History and county by county guide, with photographs and descriptions. Also an explanation of truss types, with diagrams. - http://home.comcast.net/~draft10/bridges/bridges.html
The Bridges of Portland, Oregon - Photos and descriptions of Portland, Oregon's wide variety of river bridges. - http://www.bizave.com/portland/bridges/
Oregon Covered Bridges - StateofOregon.com - 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. - http://coveredbridges.stateoforegon.com/