Johnson Pond Dam
Key Takeaway
Johnson Pond Dam is classified as significant hazard in New Jersey. It was completed in 1759 and is 267 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 10 ft (taller than 17.8% in NJ) |
| Dam Length | 575 ft |
| Dam Type | Earth |
| Normal Storage | 173 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 343 cfs |
| Year Completed | 1759 (267 years old) |
| NID ID | NJ00128 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
NJDOT
State Government
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Significant Hazard 7 ftFrequently Asked Questions
What is the hazard classification of Johnson Pond Dam?
Johnson Pond Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Johnson Pond Dam?
Johnson Pond Dam is owned by NJDOT (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnson Pond Dam built?
Johnson Pond Dam was completed in 1759, making it 267 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 Johnson Pond Dam?
Johnson Pond Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Johnson Pond Dam?
Johnson Pond Dam has a dam height of 10 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 Johnson Pond Dam last inspected?
Johnson Pond Dam was last inspected on April 7, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.