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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. The tunnel was placed into partial service in 1989 and was nicknamed the "tunnel to nowhere" due to its lack of connections in Queens. The final section of the 63rd Street Tunnel, which cost $645 million to complete and connects what had been a service dead-ending at the 21st Street station in Queensbridge to the IND Queens Boulevard Line, was finished in 2000. It was first used by trains during off-peak hours while signal work was performed in the 53rd Street Tunnel. The tunnel connection was placed into permanent service with the start of V train and the shifting of the route of the F train on December 17, 2001. Unlike previous tunnels that were bored under the riverbed, the 63rd Street Tunnel's river portions used the immersed tube method. Trenches were dug in the river bed, and four long prefabricated concrete sections of tunnel fabricated in Port Deposit, Maryland were floated into position and then sunk into the trenches. Other portions of the tunnel were built using cut-and-cover construction or rock tunneling. The tunnel also serves the Roosevelt Island station, and the Lexington Avenue station, which will serve as a cross-platform interchange to the BMT 63rd Street Line (current plans are to extend the Q train) when the first phase of the Second Avenue Subway opens for service. The tunnel has two levels. The uses the two tracks on the upper level, connecting the IND Queens Boulevard Line in Queens to the IND Sixth Avenue Line in Manhattan via the IND 63rd Street Line. There are also track connections to and from the BMT 63rd Street Line, west of the Lexington Avenue – 63rd Street station. The two trackways on the lower level are currently unused by trains, but are designed for the Long Island Rail Road's East Side Access project, which will bring LIRR commuter trains to Grand Central Terminal between 2019 and 2023. During construction of the East Side Access project, the lower level of the 63rd Street Tunnel is being used to transport equipment; excavated rock from Manhattan is also hauled out to Sunnyside Yard on a long conveyor belt.〔 The 63rd Street Tunnel and the 63rd Street Tunnel Connector received the Construction Achievement Project of the Year Award from the Metropolitan Section of the American Society of Civil Engineers in 1973 and 2000, respectively.〔(【引用サイトリンク】title=Construction Achievement Project of the Year Award )〕 The 63rd Street Tunnel Connector was also selected as the Transit Project of the Year in 1999 by ''New York Construction News''. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「63rd Street Tunnel」の詳細全文を読む スポンサード リンク
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