The decade long project to replace water siphons serving residents of Staten Island in New York City produced multiple challenges for the construction team.
The planned deepening of the Port of New York’s Anchorage Channel called for replacing two siphons with a single line within a 9,500-ft-long, 12.5-ft-dia tunnel, which was constructed using an advanced earth pressure balance tunnel-boring machine—a first for New York City, says the team.