Monksville Dam
Key Takeaway
Monksville Dam is classified as high hazard in New Jersey. It was completed in 1986 and is 40 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 | 150 ft (taller than 99.6% in NJ) |
| Dam Length | 2,170 ft |
| Dam Type | Other |
| Normal Storage | 27.5K acre-ft |
| Surface Area | 533 acres |
| Drainage Area | 43 sq mi |
| Max Discharge | 21,684 cfs |
| Year Completed | 1986 (40 years old) |
| NID ID | NJ00843 |
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
North Jersey District Water Supply Commission
State Government
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High Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Monksville Dam?
Monksville 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 Monksville Dam?
Monksville Dam is owned by North Jersey District Water Supply Commission (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Monksville Dam built?
Monksville Dam was completed in 1986, making it 40 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 Monksville Dam?
Monksville 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 Monksville Dam?
Monksville Dam has a dam height of 150 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 Monksville Dam last inspected?
Monksville Dam was last inspected on October 13, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.