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Wanaque Reservoir
2013-05-12 13 25 52 View of Wanaque Reservoir from the Wanaque Ridge Trail in Ramapo Mountain State Forest in New Jersey.jpg
View of the southern portion of Wanaque Reservoir from Wanaque Ridge in Ramapo Mountain State Forest
Location Ringwood / Wanaque,
Passaic County,
New Jersey
Type Reservoir
Primary inflows Wanaque River, Ramapo River (via Pompton Lakes intake), Pompton River (via Two Bridges intake)
Primary outflows Wanaque River
Basin countries United States
Max. length 6.6 miles (10.6 km)
Max. width 1.2 miles (1.9 km)
Surface area 2,310 acres (9.3 km2)
Average depth 37 feet (11 m)
Max. depth 90 feet (27 m)
Water volume 29,630,000,000 US gallons (1.122×1011 l)
Surface elevation 302.4 feet (92.2 m)

Wanaque Reservoir is a man-made lake located within Wanaque and Ringwood, New Jersey along the Wanaque River. The reservoir came into being in 1928 by the construction of the Raymond Dam along the river in Wanaque. Besides the Wanaque River, the reservoir receives water from two diversions: the Pompton Lakes intake, which takes water from the Ramapo River, and the Two Bridges intake, which takes water from the Pompton River. It is the second largest reservoir in New Jersey by volume, after Round Valley Reservoir.


Construction of the Wanaque Reservoir represented a significant achievement in enabling the supply of potable water to local areas that didn't have safe drinking water sources. The project took quite an extensive time. After eight years of construction, water was delivered to customers for the first time in 1930. Upon completion, the Wanaque Reservoir supplied water to several member municipalities including Bloomfield, Clifton, Glen Ridge, Kearny, Montclair, Newark, Passaic, and Paterson. A major feature that came with the construction of Wanaque Reservoir was the West Brook Road Bridge. The bridge was constructed to carry the re-located West Brook Road across the Wanaque Reservoir. Construction of the West Brook Road Bridge began in 1926 and it was opened to traffic in 1928. The bridge was to be rebuilt for safety reasons and the new bridge was completed in early 2018.

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