Second Avenue breaks through

The TBM excavating phase one of the Second Avenue Subway in New York made a break through yesterday into an existing tunnel at Lexington Avenue/63rd Street station.

This is the TBM’s second pass from 96th Street along Second Avenue having completed the western bore in March. The 7,793ft (2.4km) eastern bore started shortly after in April.

A joint venture of Skanska, Schiavone and Shea (S3 Tunnel Constructors) have been working on the twin tunnel project since 2007.