Lower Twin Lakes Dam
Key Takeaway
Lower Twin Lakes Dam is classified as significant hazard in New Jersey. It was completed in 1927 and is 99 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 | 210 ft |
| Dam Type | Earth |
| Normal Storage | 128 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 9 sq mi |
| Year Completed | 1927 (99 years old) |
| NID ID | NJ00227 |
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
Pompton Lakes Borough MUA
Private
Nearby Dams
Upper Twin Lakes Dam
Passaic, NJ
Low Hazard 7 ftLake Washington Dam
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Low Hazard 11 ftMorse Lake Dam
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Low Hazard 14 ftPompton Lakes Dam
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High Hazard 30 ftPost Brook Dam
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High Hazard 15 ftIrish Brook Dam
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High Hazard 17 ftWolf Den Dam
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High Hazard 42 ftGlen Wild Lake Dam
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Significant Hazard 21 ftFrequently Asked Questions
What is the hazard classification of Lower Twin Lakes Dam?
Lower Twin Lakes 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 Lower Twin Lakes Dam?
Lower Twin Lakes Dam is owned by Pompton Lakes Borough MUA (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lower Twin Lakes Dam built?
Lower Twin Lakes Dam was completed in 1927, making it 99 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 Lower Twin Lakes Dam?
Lower Twin Lakes 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 Lower Twin Lakes Dam?
Lower Twin Lakes 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 Lower Twin Lakes Dam last inspected?
Lower Twin Lakes Dam was last inspected on August 20, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.