Arch Bridges in Ohio: a companion website documenting historic concrete and stone arch bridges of Ohio.

Basic Bridges: Introductory information about bridge truss types and terminology.

Bridge Engineering: examines stresses in bridge types, by Todd Wilson

BridgeMapper: This new website provides historic bridge information for structures throughout the country. Webmaster, Todd Wilson.

Bridges of Metropolitan Cleveland: Compiled in 1981 to chronicle the history of Cleveland's many bridges.

Context for World Heritages Bridges: a bridge treatise by Eric DeLony of HAER.

Covered Spans of Yesteryear: Documents North America's lost covered bridges.

Digital Bridges: downloadable 19th century literature about historic bridges.

Historic American Engineering Record:  Online presentation of the HAER collections includes engineering drawings,  photographs and data pages with written histories.

Historic Bridges of Michigan and Elsewhere: Nathan Holth's excellent website is a major source of information about metal truss bridges. Be sure to check out "An Introduction to Historic Truss Bridges". Nathan has made numerous contributions to this website.

Historic and Cultural Resource Preservation Site: a directory of historic preservation websites.

Historic Bridges: part of AbandonedOhio.com includes photographs of abandoned Ohio Bridges and has shared some images with this website.

Historic Bridges of the U.S.:  A great website with coverage of select bridges of all types throughout the U.S.

National Bridge Inventory The NBI is an online searchable database compiled from the 2007 state bridge inventories. It enables easy searching for technical specifications of public bridges. Caution: since the Ohio Bridge Inventory on which the NBI is based substantially overstates the number of remaining historic truss bridges use this website (not the NBI) as the benchmark for determining the existence of old truss bridges. The 2007 Ohio Bridge Inventory also erroneously identifies most pony truss bridges as through trusses.

Ohio Historic Bridge News: News items about Ohio historic bridges from the OHBA Website.

Ohio Covered Bridge List: The Dale Travis concise list of Ohio covered bridges.

Ohio Historic Bridges: ODOT's website for historic bridges.

Spans Of Time: A remarkable report on Oklahoma's historic bridges that has lots of information about all types of metal truss bridges.