what is the longest stone arch bridge in the world
Rockville Bridge The Rockville Bridge, at the time of its completion in 1902, was, and remains, the longest stone masonry arch railroad viaduct in the world.[2] Constructed between April 1900 and March 1902 by the Pennsylvania Railroad, it has forty-eight 70-foot spans, for a total length of 3,820 feet (1,160Â m).[2]