![]() ![]() ![]() "We will put off the shut down until next year." "As we began working on this, we realized we would not be able to get everything in place by this October," he said. "Supply challenges have really pushed it back," he said. The department will have to install more pumps and drill drainage holes into the tunnel. Rush said about 2.8 feet of water was in the tunnel that construction workers would have to work in, which was not safe. "We conducted a number of tests," including how much groundwater would flow into the tunnel. The department did a test run of shutting down the aqueduct in March to test the system, "for the first time since 1958," Rush said. The tunnel is 750 feet deep at Newburgh and 900 feet deep in Wappingers Falls across the river. To fix the leak, the department announced in 2010 it would build a 2.5 mile bypass tunnel under the Hudson River. Where the steel stops, is where the leak starts. During World War II, steel was needed to build tanks, so the people building the tunnel stopped using steel for the interlining, Milgrim said. The tunnel was built 600 feet below ground in limestone during the 1940s. These holes allow between 20 and 30 million gallons of water to leak daily. The leak turned out to be valid and a leak in the aqueduct was also found in the town of Newburgh near the Roseton power plant. Rush said when he started working at the department in 1992, he visited a possible tunnel leak in the town of Wawarsing in Ulster County. The aqueduct delivers about half of New York City's water supply - about 600 million gallons a day - using only gravity, a previous article said. ![]()
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