Uncanoonuc Lake Dam
Key Takeaway
Uncanoonuc Lake Dam is classified as high hazard in New Hampshire. It was completed in 1936 and is 90 years old. Its primary use is recreation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 10 ft (taller than 16% in NH) |
| Dam Length | 176 ft |
| Dam Type | Earth |
| Max Storage | 318 acre-ft |
| Normal Storage | 211 acre-ft |
| Surface Area | 26 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 66 cfs |
| Year Completed | 1936 (90 years old) |
| Year Modified | 2018 |
| NID ID | NH00021 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
TOWN OF GOFFSTOWN
Local Government
Nearby Dams
Uncanoonuc Lake Dike
Hillsborough, NH
High Hazard 15 ftGoffstown Upper Reservoir Dam
Hillsborough, NH
High Hazard 31 ftGoffstown Lower Reservoir Dam
Hillsborough, NH
High Hazard 30 ftGregg Falls
Hillsborough, NH
High Hazard 66 ftHadley Falls
Hillsborough, NH
Significant Hazard 20 ftRiverdale Dam
Hillsborough, NH
Low Hazard 10 ftKelley'S Falls Dam
Hillsborough, NH
High Hazard 31 ftKimball Pond Dam
Merrimack, NH
Low Hazard 8 ftFrequently Asked Questions
What is the hazard classification of Uncanoonuc Lake Dam?
Uncanoonuc Lake Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Uncanoonuc Lake Dam?
Uncanoonuc Lake Dam is owned by TOWN OF GOFFSTOWN (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Uncanoonuc Lake Dam built?
Uncanoonuc Lake Dam was completed in 1936, making it 90 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 Uncanoonuc Lake Dam?
Uncanoonuc 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 Uncanoonuc Lake Dam?
Uncanoonuc Lake 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 Uncanoonuc Lake Dam last inspected?
Uncanoonuc Lake Dam was last inspected on May 17, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.