Passaic River - Course

Course

The Passaic rises in the center of Mendham, in southern Morris County. Initially, it generally flows south, through Morristown National Historical Park, and forms the boundary between Morris and Somerset counties. In its current path, it passes along the western edge of the Great Swamp, which it drains through several small tributaries. The river passes through a gorge in Millington and then turns abruptly northeast, flowing through the valley between Long Hill to the west and the Second Watchung Mountain to the east.

It forms the boundary between Morris and Union counties as it passes Berkeley Heights, New Providence, and Summit. Near Chatham it turns north, forming the boundary between Morris and Essex counties. It passes Livingston and West Caldwell, where it flows through the Hatfield Swamp and is joined by the Rockaway River. Southwest of Lincoln Park it passes through the Great Piece Meadows, where it turns abruptly eastward and is joined at Two Bridges by its major tributary, the Pompton River.

The river flows northeast into the city of Paterson, where it drops over the Great Falls of the Passaic. On the north end of Paterson, it turns abruptly south, flowing between Paterson and Clifton on the west and Hawthorne, Fair Lawn, Elmwood Park, Garfield on the east, next through the city of Clifton. At Elmwood Park it begins to form Dundee Lake, created by the Dundee Dam built in 1845. The river becomes navigable two and a half miles downstream of the Dundee Dam at the Eighth Street/Locust Ave Bridge in Wallington where the dredged Wallington Reach channel begins. Proceeding beyond the Wallington Reach, the river remains navigable via a series of maintained channels to its final destination, Newark Bay. It passes Passaic, Clifton again, then Nutley and Belleville on the west; it flows past Rutherford, Lyndhurst and North Arlington, New Jersey to the east.

In its lowest reaches, it flows along the northeast portion of the city of Newark on the west, passing Kearny and Harrison, New Jersey on the eastern bank. Near downtown Newark it makes an abrupt easterly bend, then south around Ironbound, joining the Hackensack River at the northern end of Newark Bay, a back bay of New York Harbor.