Stony Brook #2 (Willow Lake) Dam
Key Takeaway
Stony Brook #2 (Willow Lake) Dam is classified as low hazard in New Jersey. It was completed in 1959 and is 67 years old. Its primary use is recreation.
Physical Details
| Dam Height | 15 ft (taller than 51.4% in NJ) |
| Dam Length | 405 ft |
| Dam Type | Earth |
| Max Storage | 65 acre-ft |
| Normal Storage | 16 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,620 cfs |
| Year Completed | 1959 (67 years old) |
| NID ID | NJ00866 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
County of Mercer Park Commission
Local Government
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Significant Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Stony Brook #2 (Willow Lake) Dam?
Stony Brook #2 (Willow Lake) Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Stony Brook #2 (Willow Lake) Dam?
Stony Brook #2 (Willow Lake) Dam is owned by County of Mercer Park Commission (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Stony Brook #2 (Willow Lake) Dam built?
Stony Brook #2 (Willow Lake) Dam was completed in 1959, making it 67 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 Stony Brook #2 (Willow Lake) Dam?
Stony Brook #2 (Willow Lake) 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 Stony Brook #2 (Willow Lake) Dam?
Stony Brook #2 (Willow Lake) Dam has a dam height of 15 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 Stony Brook #2 (Willow Lake) Dam last inspected?
Stony Brook #2 (Willow Lake) Dam was last inspected on May 26, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.