Gonic Dam
Key Takeaway
Gonic Dam is classified as significant hazard in New Hampshire. It was completed in 1935 and is 91 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 | 130 ft |
| Dam Type | Concrete |
| Max Storage | 700 acre-ft |
| Normal Storage | 60 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 78 sq mi |
| Max Discharge | 6,300 cfs |
| Year Completed | 1935 (91 years old) |
| NID ID | NH00388 |
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
GOSPORT PROPERTIES LLC
Private
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Low Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Gonic Dam?
Gonic 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 Gonic Dam?
Gonic Dam is owned by GOSPORT PROPERTIES LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Gonic Dam built?
Gonic Dam was completed in 1935, making it 91 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 Gonic Dam?
Gonic 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 Gonic Dam?
Gonic 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 Gonic Dam last inspected?
Gonic Dam was last inspected on June 1, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.