Cannonsville Reservoir

Cannonsville Reservoir
Location	Delaware County, New York
Coordinates	42.0883°N 75.3238°W / 42.0883; -75.3238
Lake type	reservoir
Primary inflows	West Branch of the Delaware River
Primary outflows	West Delaware Tunnel
Catchment area	455 sq mi (1,180 km2)
Basin countries	United States
Water volume	36,200,000 m3 (0.0087 cu mi)

The Cannonsville Reservoir is a reservoir in Delaware County, New York, that was formed by impounding over half of the West Branch of the Delaware River. It is the westernmost of New York City's reservoirs, being at the western portion of the Delaware Watershed. Placed in service in 1964, it is the most recently constructed New York City-owned reservoir. The town of Cannonsville was destroyed to make room for the reservoir. The reservoir lies within the towns of Tompkins and Deposit.

The entrance to the Cannonsville Reservoir

It has the largest drainage basin of all of the NYC reservoirs, being at 455 square miles (1178 km²). The reservoir's capacity is 95.7 billion US gallons (362,000,000 m³). This water flows over halfway through the reservoir to enter the 44-mile (71 km) West Delaware Tunnel in Tompkins, New York. Then it flows through the aqueduct into the Rondout Reservoir, where the water enters the 85-mile (137 km) Delaware Aqueduct.

The Delaware Aqueduct then continues through the West Branch Reservoir and the Kensico Reservoir in Westchester and Putnam counties north of the city. The aqueduct continues further south through the Hillview Reservoir in Yonkers, and then continues through The Bronx, Queens, and Brooklyn, eventually ending in Staten Island, providing New York City with about 50% of their drinking water.

See also

• List of reservoirs and dams in New York