Passaic River

The Passaic River is a river, approximately 80 mi long, in northern New Jersey in the United States. The river in its upper course flows in a highly circuitous route, meandering through the swamp lowlands between the ridge hills of rural and suburban northern New Jersey, called the Great Swamp, draining much of the northern portion of the state through its tributaries. In its lower portion, it flows through the most urbanized and industrialized areas of the state, including along downtown Newark. The lower river suffered from severe pollution and industrial abandonment in the 20th century.
In April 2014, the U.S. Environmental Protection Agency announced a $1.7 billion plan to remove 4.3 million cubic yards of toxic mud from the bottom of lower eight miles of the river. It is considered one of the most polluted stretches of water in the nation and the project one of the largest clean-ups ever undertaken.
The Passaic rises in the center of Mendham, in southern Morris County. It begins between Spring Hill Road and Hardscrabble Road, travelling northeast and crossing Corey Lane before entering the Buck Hill Tract Natural Area. At this point the river begins to generally flow south, through Morristown National Historical Park, and forms the boundary between Morris and Somerset counties. In its current path, it passes through the southeast edge and drains Lord Stirling Park then along the western edge of the Great Swamp, which it drains through several small tributaries including Black Brook. 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.

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