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| Hillview Reservoir | |
|---|---|
 Southwestern portion | |
  Hillview Reservoir  Hillview Reservoir | |
| Location | Westchester County, New York |
| Coordinates | 40°54′44″N73°52′9″W / 40.91222°N 73.86917°W /40.91222; -73.86917 |
| Type | reservoir |
| Basin countries | United States |
| Surface area | 90-acre (0.36 km2) |
| Surface elevation | 90 m (300 ft)[1] |
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TheHillview Reservoir is a 90-acre (0.36 km2) storagereservoir in southeasternYonkers, New York.[2] It was built within a six-year period from 1909–1915 by the New York City Board of Water Supply to receive water from the newly constructedCatskill Aqueduct, which drained water from theAshokan Reservoir and sent it down into theKensico 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 construction of both Hillview and Kensico as well as 32 miles (51 km) of the Catskill Aqueduct.
The reservoir itself has a maximum capacity of 900 million USgallons (3,400,000 m3),[3] and water from the reservoir is sent throughNew York City Water Tunnels No. 1 andNo. 2. The plan for theNew York City Water Tunnel No. 3 is to move water from the Kensico Reservoir, and send it directly into the Hillview Reservoir, and then into the rest ofNew York City. The reservoir itself does not impound a river, and is held up by walls on all sides.
On September 23, 1950, a seaplane that had encountered engine trouble attempted an emergency landing in the reservoir but instead crashed into Kimball Avenue.[4] A month later, another seaplane made a successful emergency landing in the reservoir.[5]
In 1993, city officials considered building aconcrete cover over the reservoir to preventexcrement fromseagulls contaminating the water withbacteria andviruses.[6]
In March 2019, theNew York City Department of Environmental Protection (DEP) made an agreement with theUnited States Environmental Protection Agency (EPA) to cover the reservoir by 2049 to comply with theSafe Drinking Water Act. They also agreed to enhance efforts to manage wildlife at the reservoir in the meantime, eliminatingcliff swallow nests and capturing or killingwaterfowl.[7][8]
