New York City closes tunnel supplying half of its water for big $2B fix

A stretch of aqueduct that supplies about half of New York City’s water is being shut down through the winter as part of a $2 billion project to address massive leaks beneath the Hudson River.The temporary shutdown of the Delaware Aqueduct in upstate New York has been in the works for years, with officials steadily boosting capacity from other parts of the city’s sprawling 19-reservoir system.Water will flow uninterrupted from city faucets after the shutdown begins this week, officials said, though its famously crisp taste might be affected as other sources are tapped into more heavily.“The water will always be there,” Paul Rush, deputy commissioner for the city’s Department of Environmental Protection.

“We’re going to be changing the mix of water that consumers get.”The Delaware Aqueduct is the longest tunnel in the world and carries water for 85 miles (137 kilometers) from four reservoirs in the Catskill region to other reservoirs in the city’s northern suburbs.Operating since 1944, it provides roughly half the 1.1 billion gallons (4.2 billion liters) a day used by more than 8 million New York City residents.The system also serves some upstate municipalities.But the aqueduct leaks up to 35 million gallons (132 million liters) of water a day, nearly all of it from a section far below the Hudson River.The profuse leakage has been known about for decades, but city officials faced a quandary: They could not take the critical aqueduct offline for years to repair the tunnel.

So instead, they began constructing a parallel 2.5-mile (4-kilometer) bypass tunnel under the river about a decade ago.The new tunnel will be connected during the shutdown, which is expected to last up to eight months.More than 40 miles (64 kilometers) of the aqueduct running down from the four upstate reservoirs will be out of service during that time, though a section closer to the city will remain in use.Other leaks farther north in the aqueduct also will be repaired in the...