<Tr> <Th_colspan="2"> Pennsylvania Historical Marker </Th> </Tr> <Tr> <Th> Designated </Th> <Td> April 29, 2010 </Td> </Tr> <P> The Rockville Bridge, at the time of its completion in 1902, was, and remains, the longest stone masonry arch railroad viaduct in the world . 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 (1,160 m). </P> <P> 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 . </P>

What is the longest stone arch bridge in the world