East Branch Mamaroneck River

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East Branch Mamaroneck River flows into Mamaroneck River , which it joins at N 41° 1′ 52″, W 73° 44′ 39″ at OSM node n11752118211, and there 11 km of total upstream flows in. load it's distributaries

East Branch Mamaroneck River has 1 tributaries.

• (unnamed) , which joins it at the following points: 3 km of total upstream flows in at N 41° 3′ 18″, W 73° 43′ 52″ at OSM node n11752118567 2 km of total upstream flows in at N 41° 3′ 18″, W 73° 43′ 52″ at OSM node n11752118567
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