Manasquan Reservoir Dam
Key Takeaway
Manasquan Reservoir Dam is classified as high hazard in New Jersey. It was completed in 1990 and is 36 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 53 ft (taller than 96.8% in NJ) |
| Dam Length | 4,840 ft |
| Dam Type | Earth |
| Max Storage | 18.5K acre-ft |
| Normal Storage | 14.5K acre-ft |
| Surface Area | 770 acres |
| Drainage Area | 3 sq mi |
| Year Completed | 1990 (36 years old) |
| NID ID | NJ00858 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
New Jersey Water Supply Authority
State Government
Nearby Dams
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Significant Hazard 14 ftWetland Area I-2 Dam
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Low Hazard 9 ftLake Shenandoah Dam
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Significant Hazard 17 ftBtmua Reservoir Dam
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High Hazard 20 ftForest Drive Dam
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Significant Hazard 10 ftLake Carasaljo Dam
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High Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Manasquan Reservoir Dam?
Manasquan Reservoir Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Manasquan Reservoir Dam?
Manasquan Reservoir Dam is owned by New Jersey Water Supply Authority (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Manasquan Reservoir Dam built?
Manasquan Reservoir Dam was completed in 1990, making it 36 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Manasquan Reservoir Dam?
Manasquan Reservoir Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Manasquan Reservoir Dam?
Manasquan Reservoir Dam has a dam height of 53 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Manasquan Reservoir Dam last inspected?
Manasquan Reservoir Dam was last inspected on September 27, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.