Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Bloomington Viaduct spans the Northern Branch of the Potomac River connecting Bloomington, Maryland to Mineral County, West Virginia. The sandstone railroad bridge features three full center arches, each with a 56 foot span and a 28 foot rise. It is presently owned and operated by CSX Transportation on its Mountain Subdivision. When built in 1851, it carried a double track of the original Baltimore and Ohio Railroad main line. In 1916 the viaduct was widened to accommodate two more tracks.