The 63rd Street Tunnel carries the 63rd Street Line of the New York City Subway under the East River between the boroughs of Manhattan and Queens. It is the newest of the East River tunnels, and the newest river crossing in the New York metropolitan area. Construction of the 63rd Street Tunnel began on November 24, 1969, and the tunnel was holed through beneath Roosevelt Island on October 10, 1972. However, completion of the tunnel was delayed by New York City's fiscal crisis of the 1970s.