The Cannonsville Reservoir is a

reservoir A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including contro ...

in the

New York City water supply system A combination of aqueducts, reservoirs, and tunnels supplies fresh water to New York City. With three major water systems ( Croton, Catskill, and Delaware) stretching up to away from the city, its water supply system is one of the most extens ...

Delaware County, New York Delaware County is a county located in the US state of New York. As of the 2020 United States census, the population was 44,308. The county seat is Delhi. The county is named after the Delaware River, which was named in honor of Thomas West, ...

. It was formed by construction of the Cannonsville Dam on its west end, which impounded over half of the

West Branch of the Delaware River The West Branch Delaware River is one of two branches that form the Delaware River. It is approximately 90 mi (144 km) long, and flows through the U.S. states of New York and Pennsylvania. It winds through a mountainous area of New York ...

. Lying on the western part of the Delaware Watershed, it is the westernmost of

New York City's New is an adjective referring to something recently made, discovered, or created. New or NEW may refer to: Music * New, singer of K-pop group The Boyz Albums and EPs * ''New'' (album), by Paul McCartney, 2013 * ''New'' (EP), by Regurgitator, ...

reservoirs. It was placed in service in 1964, and is the most recently constructed New York City-owned reservoir. The town of Cannonsvile was destroyed to make room for the reservoir, which lies within the towns of Tompkins and Deposit. Its drainage basin is the largest of all of the NYC reservoirs. Capacity is . Water from the reservoir flows through the West Delaware Tunnel into the

Rondout Reservoir Rondout Reservoir is part of New York City's water supply network. It is located 75 miles (120 km) northwest of the city in the Catskill Mountains, near the southern end of Catskill Park, split between the towns of Wawarsing in Ulster County ...

, before joining the

Delaware Aqueduct The Delaware Aqueduct is an aqueduct in the New York City water supply system. It takes water from the Rondout, Cannonsville, Neversink, and Pepacton reservoirs on the west bank of the Hudson River through the Chelsea Pump Station, then into ...

, which provides New York City with about 50% of its drinking water. The Delaware Aqueduct then crosses beneath the

Hudson River The Hudson River is a river that flows from north to south primarily through eastern New York. It originates in the Adirondack Mountains of Upstate New York and flows southward through the Hudson Valley to the New York Harbor between N ...

and continues on to the

West Branch Reservoir The West Branch Reservoir is a reservoir in the New York City water supply system. Formed by impounding the upper reaches of the West Branch of the Croton River, it is located in the Putnam County, New York, towns of Kent, and Carmel, about n ...

Putnam County, New York Putnam County is a county located in the U.S. state of New York. As of the 2020 census, the population was 97,668. The county seat is Carmel. Putnam County formed in 1812 from Dutchess County and is named for Israel Putnam, a hero in the ...

, then the

Kensico Reservoir The Kensico Reservoir is a reservoir spanning the towns of Armonk ( North Castle) and Valhalla ( Mount Pleasant), New York, located 3 miles (5 km) north of White Plains. It was formed by the original earth and gravel Kensico Dam constructed in 18 ...

Westchester County Westchester County is located in the U.S. state of New York. It is the seventh most populous county in the State of New York and the most populous north of New York City. According to the 2020 United States Census, the county had a population o ...

, both north of the city. It then continues further south to the

Hillview Reservoir The Hillview Reservoir is a storage reservoir in southeastern Yonkers, New York. 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 constructed Catskill Aqueduct, whi ...

in Yonkers, where it joins the flows of the Catskill and New Croton aqueducts for distribution through the New York City tunnel system. The Cannonsville Dam is being considered as a site for a 14.08MW hydroelectric generating station.

Tributaries

Johnny Brook Johnny Brook is a river in Delaware County, New York. It flows into Cannonsville Reservoir The Cannonsville Reservoir is a reservoir in the New York City water supply system in Delaware County, New York. It was formed by construction of the Can ...

* Dry Brook *

Sherruck Brook Sherruck Brook is a river in Delaware County, New York. It flows into Cannonsville Reservoir The Cannonsville Reservoir is a reservoir in the New York City water supply system in Delaware County, New York. It was formed by construction of the C ...

* Trout Creek *

Loomis Brook Loomis Brook is a river in Delaware County, New York. It flows into Cannonsville Reservoir The Cannonsville Reservoir is a reservoir in the New York City water supply system in Delaware County, New York. It was formed by construction of the Can ...

Chamberlain Brook Chamberlain Brook is a river in Delaware County, New York. It flows into Cannonsville Reservoir The Cannonsville Reservoir is a reservoir in the New York City water supply system in Delaware County, New York. It was formed by construction of th ...

Dryden Brook Sir Dryden Brook (25 August 1884 – 30 January 1971) was a Labour Party politician in the United Kingdom, and a Member of Parliament (MP) from 1945 to 1955. Brook was a wool merchant in Halifax. He served as a Labour Party member of Halifax B ...

Maxwell Brook Maxwell Brook is a river in Delaware County, New York. It flows into Cannonsville Reservoir The Cannonsville Reservoir is a reservoir in the New York City water supply system in Delaware County, New York. It was formed by construction of the Ca ...

Fish Brook Fish Brook is a river in Delaware County, New York. It flows into Cannonsville Reservoir The Cannonsville Reservoir is a reservoir in the New York City water supply system in Delaware County, New York. It was formed by construction of the Canno ...

File:Cannonsville Reservoir from the air.jpg, Aerial view of Cannonsville Reservoir File:Cannonsville Reservoir sign.jpg, The entrance to the Cannonsville Reservoir File:Cannonsville Res, Rt. 10 Deposit, NY.JPG, Cannonsville Reservoir at Deposit

References

External links

Final Environmental Assessment for Hydropower License
{{authority control Delaware River Catskill/Delaware watersheds Reservoirs in New York (state) Protected areas of Delaware County, New York Reservoirs in Delaware County, New York Dams completed in 1964 1964 establishments in New York (state)

Tributaries

See also

References

External links