Lake Tappan Dike
Lake Tappan Dike is an earth dam located in Bergen County, New Jersey. It carries a Low hazard potential classification.
About Lake Tappan Dike
The primary purpose of Lake Tappan Dike is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Suez Water New Jersey (private). It impounds the Hackensack River near Old Tappan.
The dam stands 20 feet tall and stretches 2,500 feet across, creates a reservoir covering 560 acres, has a storage capacity of 8,000 acre-feet, and collects water from a drainage area of 49 square miles.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 04/01/2000. That was over 26 years ago.
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Location
| State | New Jersey |
| County | Bergen |
| Nearest City | Old Tappan |
| River/Stream | Hackensack River |
| Coordinates | 41.02588, -73.99850 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 2,500 ft |
Storage & Hydraulics
| NID Storage | 8,000 acre-ft |
| Normal Storage | 8,000 acre-ft |
| Surface Area | 560 acres |
| Drainage Area | 49 sq mi |
| Max Discharge | 45,000 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Suez Water New Jersey |
| Owner Type | Private |
| Hazard Classification | Low |
| Last Inspection | 04/01/2000 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00898 |
| Federal ID | NJ00898 |
| More Info | State Dam Safety Program |