Originally known as the St. Anthony Falls Bridge, the Third Avenue Bridge carries road traffic above the edge of Saint Anthony Falls. Designed by city engineer Frederick W. Cappelen, the bridge curves to avoid fractures in the limestone bedrock. Construction on the bridge’s long series of open spandrel arches began in 1914. The 2,233 foot crossing was completed in 1918. Opening ceremonies were conducted on Flag Day-Friday June 14th. A group of aldermen, engineers and 20,000 schoolchildren waving American flags were among the first to cross.