Baltimore & Ohio Southwestern Railroad

Reporting mark: B&OSW
Originally the Marietta & Cincinnati Railroad ( http://en.wikipedia.org/wiki/Marietta_and_Cincinnati_Railroa...), the railroad was renamed Baltimore & Ohio Southwestern Railroad in 1889. Merged into the Baltimore & Ohio in 1900.

Source: http://en.wikipedia.org/wiki/Baltimore_and_Ohio_Railroad

B&O Southern Bridge (Lawrence County, Indiana)
Built 1893; Removed 1923
Lost Bridge over White River East Fork
Only pillars remain

CSX - Tunnel Hill Road Overpass (Lawrence County, Indiana)
Stone arch bridge over Tunnel Hill Road on CSX Railroad
Open to traffic