Lake Tappan is a reservoir impounded by the Tappan Dam on the Hackensack River, straddling the border between the U.S. states of New Jersey and New York. Within New Jersey, the lake traverses the border separating the municipalities of River Vale and Old Tappan in Bergen County, while extending northward across the New York state line int…
Lake Tappan is a reservoir impounded by the Tappan Dam on the Hackensack River, straddling the border between the U.S. states of New Jersey and New York. Within New Jersey, the lake traverses the border separating the municipalities of River Vale and Old Tappan in Bergen County, while extending northward across the New York state line into the town of Orangetown in Rockand County. The reservoir was formed in 1967, flooding areas that included the former CAPROC Field Civil Air Patrol airstrip.
Location: Bergen County, New Jersey and Rockland County, New York, United States
Lake type: reservoir
Primary inflows: Hackensack River
Basin countries: Newark Basin · United States
Surface area: 1,255 acres (5.08 km²)
Water volume: 3,500,000,000 US gal (13,000,000 m³)
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