Nubanusit Lake Dam
Key Takeaway
Nubanusit Lake Dam is classified as significant hazard in New Hampshire. It was completed in 1861 and is 165 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 16 ft (taller than 54.9% in NH) |
| Dam Length | 279 ft |
| Dam Type | Earth |
| Max Storage | 7.6K acre-ft |
| Normal Storage | 4.6K acre-ft |
| Surface Area | 733 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 992 cfs |
| Year Completed | 1861 (165 years old) |
| NID ID | NH00339 |
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
TWITCHELLS MILLS HYDRO CORP
Private
Nearby Dams
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High Hazard 16 ftCheshire Mills
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Significant Hazard 21 ftCheshire Mills Lower Dam
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High Hazard 18 ftSkatutakee Lake Dam
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Significant Hazard 13 ftChilds Bog Dam
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High Hazard 17 ftSilver Lake Dam
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Low Hazard 12 ftSeaver Reservoir Dam
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High Hazard 30 ftFrequently Asked Questions
What is the hazard classification of Nubanusit Lake Dam?
Nubanusit Lake 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 Nubanusit Lake Dam?
Nubanusit Lake Dam is owned by TWITCHELLS MILLS HYDRO CORP (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Nubanusit Lake Dam built?
Nubanusit Lake Dam was completed in 1861, making it 165 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 Nubanusit Lake Dam?
Nubanusit 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 Nubanusit Lake Dam?
Nubanusit Lake Dam has a dam height of 16 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 Nubanusit Lake Dam last inspected?
Nubanusit Lake Dam was last inspected on November 26, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.