Commuter Rail
MTA Launches Second Avenue Subway Tunnel Boring Machine
NEW YORK — The Metropolitan Transportation Authority (MTA) earlier this month launched the tunnel boring machine that will dig the first phase of the Second Avenue Subway. The 485-ton, 450-foot-long machine will dig through approximately 50 feet of Manhattan bedrock per day as it completes two runs from 92nd Street to 63rd Street by November 2011.
