60th Street Tunnel
Overview
 
The 60th Street Tunnel carries the trains of the New York City Subway
New York City Subway
The New York City Subway is a rapid transit system owned by the City of New York and leased to the New York City Transit Authority, a subsidiary agency of the Metropolitan Transportation Authority and also known as MTA New York City Transit...

 under the East River
East River
The East River is a tidal strait in New York City. It connects Upper New York Bay on its south end to Long Island Sound on its north end. It separates Long Island from the island of Manhattan and the Bronx on the North American mainland...

 and Roosevelt Island
Roosevelt Island
Roosevelt Island, known as Welfare Island from 1921 to 1973, and before that Blackwell's Island, is a narrow island in the East River of New York City. It lies between the island of Manhattan to its west and the borough of Queens to its east...

 between Manhattan
Manhattan
Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York...

 and Queens
Queens
Queens is the easternmost of the five boroughs of New York City. The largest borough in area and the second-largest in population, it is coextensive with Queens County, an administrative division of New York state, in the United States....

.

The tunnel was built as part of the Dual Contracts period of New York City subway construction. The original plan provided for trackage over the Ed Koch Queensboro Bridge, which spans the East River
East River
The East River is a tidal strait in New York City. It connects Upper New York Bay on its south end to Long Island Sound on its north end. It separates Long Island from the island of Manhattan and the Bronx on the North American mainland...

 from about 59th Street
59th Street (Manhattan)
59th Street in the New York City borough of Manhattan runs east-west, from York Avenue to the West Side Highway, with a discontinuity between Ninth Avenue/Columbus Avenue and Eighth Avenue/Central Park West for the Time Warner Center. Although it is bi-directional for most of its length, the...

 in Manhattan to Queens Plaza
Queens Plaza (IND Queens Boulevard Line)
Queens Plaza is an express station on the IND Queens Boulevard Line of the New York City Subway. Located at the large Queens Plaza interchange, it is served by the E train at all times, by the R train at all times except late nights, and by the M train on weekdays except late nights.While situated...

 in Queens. However, an investigation made following the 1907 collapse of the Quebec Bridge
Quebec Bridge
right|thumb|Lifting the centre span in place was considered to be a major engineering achievement. Photo caption from [[Popular Mechanics]] Magazine, December 1917...

 determined that the bridge would not be able to handle the additional weight of subway trains; thus, the tunnel was constructed to the north.
 
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