The Hillview Reservoir (Yonkers) is a 90-acre (0.36 km2) storage reservoir in southeastern Yonkers, New York. It was built within six years, from 1909–to 1915, by the New York City Board of Water Supply, to receive water from the newly constructed Catskill Aqueduct, which drained water from the Ashokan Reservoir and sent it down into the Kensico Reservoir, where it would, in turn, be drained back into a continuation of the Catskill Aqueduct, and sent into the Hillview Reservoir. Frank E. Winsor was the engineer in charge of the construction of Hillview and Kensico and 32 miles (51 km) of the Catskill Aqueduct.
The reservoir has a maximum capacity of 900 million US gallons (3,400,000 m³), and water from the reservoir is sent through New York City Water Tunnels No. 1 and No. 2. New York City Water Tunnel No. 3, which is still under construction, is planned to take water from the Kensico Reservoir and immediately send it into the Hillview Reservoir and then into the rest of New York City. The reservoir itself does not impound a river and is held up by walls on all sides. EZ Yonkers Junk Removal
In March 2019, the New York City Department of Environmental Protection (DEP) agreed with the United States Environmental Protection Agency (EPA) cover the reservoir by 2049 to comply with the Safe Drinking Water Act. They also agreed to enhance efforts to manage wildlife at the pool in the meantime, eliminating cliff swallow nests and capturing or killing waterfowl.
New York City has agreed to a nearly $3-billion set of improvements to a nearby reservoir, including a cover, and to pay a $1-million fine to settle federal allegations that the city didn’t comply with Safe Drinking Water Act requirements, the Dept. of Justice says. The agreement—spelled out in a consent decree filed on March 18 in federal district court in Brooklyn, N.Y., and a federal lawsuit—deals with the Hillview Reservoir in Yonkers, N.Y., a short-term distance north of the Bronx.
The 90-acre reservoir provides as much as 1 billion gallons of water to the city per day. DOJ calls the facility “the last stop for drinking water before it enters the city’s water tunnels for distribution to city residents.”
According to DOJ, before the water enters the reservoir, it is treated with chlorine and ultraviolet rays. But the department adds that the water in the uncovered reservoir can be re-contaminated by pathogens from birds and other animals and viruses, and the protozoa Giardia and Cryptosporidium. It says those organisms can cause potentially fatal gastrointestinal illnesses in humans.
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