South River (Raritan River tributary)

[1][2][3] The South River, formed by the confluence of Matchaponix Brook and Manalapan Brook, becomes tidal downstream of the Duhernal Lake dam and joins the Raritan River approximately midway between New Brunswick and Perth Amboy.

[3] The community of Old Bridge in East Brunswick was established in the 17th century at the head of navigation of the river.

It used to loop inefficiently to its confluence with the Raritan River, so a shortcut called Washington Canal was created.

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Aerial view of the South River
South River looking north (downstream) from the County Route 535 bridge in South River and Sayreville
Looking north at the South River from the Old Bridge – Sayreville border.