The Boyne Viaduct is a railway bridge that crosses the river Boyne in Drogheda, Ireland, carrying the main Dublin–Belfast railway line.The structure is approximately: 1760 feet in length, consisting of 15 semi-circular masonry arch spans, 12 on the south and three on the north side. It was designed by Irish civil engineer Sir John Benjamin MacNeill and was completed in 1855. The bridge was significantly refurbished in the 1930s and again in the 1990s. The stamp was designed by Vermillion design.