The Thaddeus Kosciusko Bridge, commonly referred to as the Twin Bridges, or just "The Twins", located in the United States, is a pair of identical through arch bridges, made of steel, which span the Mohawk River between the towns of Colonie, Albany County and Halfmoon, Saratoga County, in New York's Capital District. One span carries three lanes of Interstate 87 northbound and one carries three southbound lanes between exits 7 and 8. The toll-free bridge opened in 1959 as part of the Adirondack Northway, a 176-mile highway linking Albany and the Canada–United States border at Champlain. The Interstate 87 section of the highway was formally inaugurated by Governor Nelson Rockefeller on May 26, 1961.