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343:. It joins the 'East Branch' near the junction of Anderson Hill Road and Westchester Avenue. The Mamaroneck River flows another 2.5 mi (4.0 km) 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.
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The West Branch of the
Mamaroneck River is the smallest of the Mamaroneck River's two primary tributaries, draining an area of 2.3 sq mi (6.0 km) just south and southeast of downtown White Plains. The west branch originates from a wetland and pond adjacent to Archbishop Stepinac High
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The East Branch of the
Mamaroneck River is 3.3 mi (5.3 km) long. The main stem is 1.9 mi (3.1 km) long north of its confluence with the east branch. The east branch originates from a small pond in north Harrison at about 400 ft (120 m) above sea level and then flowing
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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
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School on
Mamaroneck Avenue and flows about 2.75 mi (4.43 km) 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.
350:. 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
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The watershed of the
Mamaroneck River is 17.4 sq mi (45 km). It is dominated by suburban residential neighborhoods and commercial and retail tracts. High density
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316:. 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.
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southeast 0.7 mi (1.1 km) into Forest Lake. South of Forest Lake, it flows westerly to its confluence with the main stem.
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The main stem of the
Mamaroneck River flows southeasterly, paralleling Westchester Avenue and the
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also is prevalent throughout the middle and lower portions of the watershed.
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Biological stream assessment, Mamaroneck River, Westchester County, New York
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just south of the
Hutchinson River Parkway near Mamaroneck Avenue.
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Originating 430 ft (130 m) above sea level in a small
453:. New York: New York (State). Stream Biomonitoring Unit.
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416:. Harrison, New York: Harbor Hill Books. p. 78.
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300:and flows 7.3 miles (11.7 km) south through
414:The Place-Names of Westchester County, New York
362:and finally emptying into Mamaroneck Harbor on
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430:. U.S. Geological Survey. January 23, 1980
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486:Rivers of Westchester County, New York
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267:17.4 sq mi (45 km)
428:"GNIS Detail - Mamaroneck River"
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16:River in New York, United States
226: • coordinates
161: • coordinates
106: • coordinates
25:Bonnie Brook, Merrimack River
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78:Physical characteristics
412:Lederer, Richard M. (1978).
286:Southern Westchester County
216: • location
96: • location
37:Halstead Avenue, Mamaroneck
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481:Rivers of New York (state)
248:40.9398209°N 73.7209638°W
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449:Bode, Robert W. (2000).
348:Hutchinson River Parkway
308:, where it empties into
393:List of New York rivers
321:residential development
253:40.9398209; -73.7209638
183:40.954914°N 73.736621°W
100:White Plains, New York
354:and Harrison. At the
292:. The river forms in
188:40.954914; -73.736621
128:41.04288°N 73.75236°W
471:Mamaroneck, New York
220:Mamaroneck, New York
356:New England Thruway
244: /
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133:41.04288; -73.75236
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352:Mamaroneck Village
72:Westchester County
476:Long Island Sound
364:Long Island Sound
314:Long Island Sound
310:Mamaroneck Harbor
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209:Long Island Sound
152:Source confluence
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434:December 26,
432:. Retrieved
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341:White Plains
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294:White Plains
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370:Tributaries
284:located in
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465:Categories
399:References
279:freshwater
264:Basin size
239:73°43′15″W
236:40°56′23″N
174:73°44′12″W
171:40°57′18″N
119:73°45′08″W
116:41°02′34″N
387:See also
337:Harrison
335:area in
333:wetlands
298:Harrison
290:New York
68:District
62:New York
43:Location
306:Village
48:Country
327:Detail
282:stream
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87:Source
277:is a
204:Mouth
58:State
436:2011
312:and
304:and
296:and
273:The
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
