Clark Street Tunnel
Encyclopedia
The Clark 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...

 between the boroughs of 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 Brooklyn
Brooklyn
Brooklyn is the most populous of New York City's five boroughs, with nearly 2.6 million residents, and the second-largest in area. Since 1896, Brooklyn has had the same boundaries as Kings County, which is now the most populous county in New York State and the second-most densely populated...

. It was opened for revenue service on Tuesday, April 15, 1919, relieving crowding on the Joralemon Street Tunnel
Joralemon Street Tunnel
The Joralemon Street Tunnel carries the trains of the IRT Lexington Avenue Line of the New York City Subway under the East River from the Bowling Green neighborhood in Manhattan to Joralemon Street and Willow Place in Brooklyn...

 and providing passengers with a direct route to travel between Brooklyn and the west side of 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...

. It is about 5,900 feet long, with about 3,100 feet underwater.

Construction of the tunnel began on October 12, 1914, using a tunneling shield in conjunction with compressed air. The tunnel was designed by civil engineer Clifford Milburn Holland
Clifford Milburn Holland
Clifford Milburn Holland was born in Somerset, Massachusetts. He was the only child of Edward John Holland and Lydia Frances Hood. He graduated from Harvard University with a B.A. in 1905 and a B.S. in Civil Engineering in 1906. On November 5, 1908 he married Anna Coolidge Davenport...

, who would later serve as the first chief engineer of the Holland Tunnel
Holland Tunnel
The Holland Tunnel is a highway tunnel under the Hudson River connecting the island of Manhattan in New York City with Jersey City, New Jersey at Interstate 78 on the mainland. Unusual for an American public works project, it is not named for a government official, politician, or local hero or...

. The north tube was holed through on November 28, 1916.

On December 28, 1990, an electrical fire in the Clark Street Tunnel trapped passengers on a subway train for over half an hour, killing two people and injuring 149 passengers.
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