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. Constructed between April 1900 and March 1902 by the Pennsylvania Railroad, it has forty-eight 70-foot spans, for a total length of.The bridge crosses the Susquehanna River about 5mi north of Harrisburg, Pennsylvania. The eastern end is in Rockville, and the western end is just south of Marysville.HistoryThe original bridge on the spot opened on September 1, 1849, when the PRR began operating over it. The Northern Central Railway began to use it after abandoning their Marysville Bridge. The current bridge was built by Italian laborers, who worked for two contractors (Drake & Stratton Co. and H.S. Kerbaugh), one on the east side of the Susquehanna River and one on the west. Local people from the Harrisburg area also worked on the bridge.For most of its life the bridge carried four main line tracks. They were reduced to three in the 1980s when the PRR Main Line was modernized across Pennsylvania. In the late 1990s an intermodal container was blown off an intermodal freight train and landed in the river, prompting Norfolk Southern to reconfigure the track layout by terminating the wye track to Enola at the west end of the bridge. This reduced the number of main line tracks to two, but left a buffer zone on either side to prevent further containers ending up in the river, although high winds from the departing December 2010 North American blizzard resulted in a similar outcome on December 27, 2010.