Joralemon Street Tunnel (New York City, New York)

 tunnel, invisible, do not draw title

In 1908, the Joralemon Street Tunnel was the first tunnel to cross under the East River. It was part of the first plan for rapid subway transit in New York, which was put into effect on September 27, 1900. The Joralemon Street Tunnel was opened for public transit on January 9th, 1908. This tunnel was constructed using the shield method with a maximum air pressure of 29 pounds per square inch (psi).

Structurally it is two cast iron tubes and measures 2,170 feet in length. As the first tunnel to span the East River, the Joralemon Street Tunnel was an impressive feat of engineering for its time; even warranting its own post card (see above). The Joralemon Street Tunnel currently services the 4 and 5 trains connecting the southern tip of Manhattan, where it joins to bottom (southern) end of the IRT Lexington Avenue Line, to Brooklyn, where it forms the start to the western end of the IRT Eastern Parkway Line

eastriverhistory.webs.com/transportation/tunnelsER.htm