The Rockville Bridge was constructed between 1900-1902 by the Pennsylvania Railroad, and at the time of its completion in 1902, it was the longest stone masonry arch railroad viaduct in the world. The bridge crosses the Susquehanna River about 5 miles north of Harrisburg, Pennsylvania. The eastern end is in Rockville, and the western end is just south of Marysville. The bridge has forty-eight 70-foot spans, for a total length of 3,820 feet. I finally captured this photo on 7/15/2008 at 9:18 AM.