Construction on what has been described as New York City’s longest-running and most expensive construction project — a tunnel to expand the capacity of the water supply system — reached a new milestone yesterday. And it was ahead of schedule.
Work on Manhattan sections of the tunnel have been taking place seven days-a-week — on multiple shifts.
The project is one arm of the extensive network of tunnels, aqueducts and reservoirs that comprise the city's remarkable water supply system.
Approximately 2,750 feet of new trunk water mains have been installed on the Upper East Side, along with upgrades to existing mains. The work was executed by the city’s departments of Environmental Protection and Design and Construction, who report that the $38 million construction project was completed five months early.
According to the DEP, trunk water mains range in size from 30 to 48 inches and “serve as a conduit between the large water tunnel shafts and the smaller water mains that make up the local distribution networks."