Delaware Aqueduct

Built between 1939 and 1945, the Delaware Aqueduct carries about half of New York City's water supply of 1.3 billion US gallons (4,900,000 m3) per day.

Rondout is considered by the New York City Department of Environmental Protection (NYCDEP) to be part of the Delaware system despite being firmly within the Hudson River watershed.)

"The number's going to be $1.5 billion to do the entire program to make the fix," said Paul Rush, Deputy Commissioner of the NYCDEP.

"About two-thirds of it, $1 billion, will actually go into constructing a bypass tunnel around the location with the most significant leakage in Roseton, and to do additional concrete grouting in the Wawarsing section.

[6] The shutdown was rescheduled for 2024–2025; completion of the project depends on potential drought conditions and associated demand levels for water from the Delaware system.