The Mamaroneck River is a freshwater stream located in Southern Westchester County, New York. The river forms in White Plains and

Harrison Harrison may refer to: People * Harrison (name) * Harrison family of Virginia, United States Places In Australia: * Harrison, Australian Capital Territory, suburb in the Canberra district of Gungahlin In Canada: * Inukjuak, Quebec, or " ...

and flows south through Mamaroneck Town and

Village A village is a clustered human settlement or community, larger than a hamlet but smaller than a town (although the word is often used to describe both hamlets and smaller towns), with a population typically ranging from a few hundred ...

, where it empties into Mamaroneck Harbor and Long Island Sound. The name of the river comes from a local native American word meaning, "where the fresh water meets the salt water." The river flows into Long Island Sound. The watershed of the Mamaroneck River is 17.4 square miles. It is dominated by suburban residential neighborhoods and commercial and retail tracts. High density

residential development A residential area is a land used in which housing predominates, as opposed to industrial and commercial areas. Housing may vary significantly between, and through, residential areas. These include single-family housing, multi-family resi ...

also is prevalent throughout the middle and lower portions of the watershed.

Detail

Originating 430 feet above sea level in a small wetlands area in

, the river flows south along the eastern boundary of White Plains. It joins the 'East Branch' near the junction of Anderson Hill Road and Westchester Avenue. The Mamaroneck River flows another 2.5 miles to its confluence with the 'West Branch', where it forms the river's main stem. Human encroachment into the stream corridor and manipulation of the stream channel are byproducts of intense residential construction in and around the river's headwaters. The main stem of the Mamaroneck River flows southeasterly, paralleling Westchester Avenue and the

Hutchinson River Parkway The Hutchinson River Parkway (known colloquially as The Hutch) is a north–south parkway in southern New York in the United States. It extends for from the massive Bruckner Interchange in the Throggs Neck section of the Bronx to the New York ...

. Below the parkway, the river flows south to its confluence with the West Branch of the Mamaroneck River at the Mamaroneck Reservoir. South of the reservoir, the river forms the municipal boundary between Mamaroneck Village and Harrison. At the

New England Thruway Interstate 95 (I-95) is part of the Interstate Highway System and runs from Miami, Florida, to the Canada–United States border near Houlton, Maine. In the U.S. state of New York, I-95 extends from the George Washington Bridge in New Yor ...

, the Mamaroneck River flows southward through Mamaroneck Village, where it joins the

Sheldrake River The Sheldrake River is a freshwater stream located in Southern Westchester, Southern Westchester County, New York (state), New York. The river forms in White Plains, New York, White Plains and flows south until it joins the Mamaroneck River. A ...

and finally emptying into Mamaroneck Harbor on Long Island Sound.

Tributaries

Two principal tributaries enter the Mamaroneck River, one from the east and one from the west. The East Branch of the Mamaroneck River is the furthest upstream tributary and originates in north Harrison near the intersection of Westchester Avenue and Anderson Hill Road. The West Branch originates just south of the Hutchinson River Parkway near Mamaroneck Avenue. The East Branch of the Mamaroneck River is 3.3 miles long. The main stem is 1.9 miles long north of its confluence with the east branch. The east branch originates from a small pond in north Harrison at about 400 feet above sea level and then flows southeast 0.7 miles into Forest Lake. South of Forest Lake, it flows westerly to its confluence with the main stem. The West Branch of the Mamaroneck River is the smallest of the Mamaroneck River's two primary tributaries, draining an area of 2.3 square miles just south and southeast of downtown White Plains. The west branch originates from a wetland and pond adjacent to Archbishop Stepinac High School on Mamaroneck Avenue and flows about 2.75 miles south and southwest through several stormwater management basins to its confluence with the main stem near the intersection of Mamaroneck Avenue and Hutchinson River Parkway.

References

{{authority control Mamaroneck, New York Long Island Sound Rivers of New York (state) Rivers of Westchester County, New York

Detail

Tributaries

See also

References