The Medora Covered Bridge over the East Fork of the White River in Southern Indiana is the longest covered bridge in the United states with the entire original historic truss still in place with some repairs but no structural changes (1,2). Measuring the clear span (abutment face to abutment face) of 431'10"(3), the Medora Covered Bridge is the longest historic covered bridge in the United States (4,5). The roof length of 461' (6) and the siding at the floor length of 459' (7) are also the longest historic covered bridge measurements in the U.S..
1. Indiana Department Of Transportation, Bridge Plans, Project No. 0101359, Medora Covered Bridge
2. Guidelines For Rehabilitating Covered Bridges, Christopher Marston and Thomas A. Vitanza, pages 128-139
3. Specifications for Medora Covered Bridge by J.J. Daniels
4. Tippin, Morris; Barker, P.E., James (Summer 2014). Indiana Crossings, "Which Bridge Is the Longest Historic Covered Bridge?". Indiana Covered Bridge Society. p. 3.
5. Miller, Terry E. (Winter 2015). "Is There a "Longest Historical Covered Bridge" in the United States?". Covered Bridge Topics.
6. Buildings at fair pique peoples interest in history, Zach Spicer, Seymour Tribune, 07/24/19
7. William Cotterman, Architect, Indianapolis, IN