Tunneling Below Second Avenue
In Manhattan, where street traffic tends to stall, only one subway runs the length of the East Side. Every weekday, 1.3 million passengers — more than are carried in 24 hours by the transit systems of Boston, Chicago and San Francisco combined — cram onto the Lexington Avenue line. Yet the chaos above and below has inspired afeat: about 475 laborers are now removing 15 million cubic feet of rock and 6 million cubic feet of soil — more than half an Empire State Building by volume — out from under two miles of metropolis. In December 2016, that tunnel will make its debut as a portion of the Second Avenue subway — the great failed track New York City has been postponing, restarting, debating, financing, definancing and otherwise meaning to get in the ground since 1929.
Read more via The New York Times