Rockville Bridge

The Rockville Bridge, at the time of its completion in 1902, was the longest stone masonry arch railroad viaduct in the world.[1] Constructed between 1900 - 1902 by the Pennsylvania Railroad, it has forty-eight 70-foot spans, for a total length of 3,820 feet (1,164 m).[1]
The bridge crosses the Susquehanna River about 5 miles (8 km) north of Harrisburg, Pennsylvania. The eastern end is in Rockville and the western end is just south of Marysville.