ATS_”Australian Design Experience on the Second Avenue Subway and the Manhattan Tunnel Project”

Two of the most significant underground projects in the United States are utilising Australian Designers Firstly, the Second Avenue Subway Phase 2 (SAS2) is a USD $2.0 billion extension of New York City’s Q train from 96th Street to 125th Street. SAS2 adds three new stations and utilises tunnel boring, cut-and-cover and conventional mining methods, concurrently to achieve revenue service in 2032. Secondly the Manhattan Tunnel Project, which utilizes jet grouting, ground freezing, and shield tunnelling prepare a pathway through historic buried obstructions on the Eastern bank of the Hudson River to allow completion of the Hudson River Tunnels into Penn Station.

Together the two projects span the full range of urban underground practice, from hard rock caverns to shallow soft-ground tunnelling in congested ground.