Mendums Pond Dam
Key Takeaway
Mendums Pond Dam is classified as high hazard in New Hampshire. It was completed in 1840 and is 186 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 | 31 ft (taller than 87.9% in NH) |
| Dam Length | 440 ft |
| Dam Type | Earth |
| Max Storage | 3.3K acre-ft |
| Normal Storage | 2.0K acre-ft |
| Surface Area | 265 acres |
| Drainage Area | 7 sq mi |
| Year Completed | 1840 (186 years old) |
| Year Modified | 1977 |
| NID ID | NH00133 |
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
NH DES WATER DIVISION
State Government
Nearby Dams
Nottingham Lake Dam
Rockingham, NH
Low Hazard 14 ftSwains Lake Dam
Strafford, NH
High Hazard 17 ftNippo Pond Dam
Strafford, NH
Low Hazard 9 ftRichardson Pond Dam
Strafford, NH
Low Hazard 8 ftNorth River Pond Dam
Rockingham, NH
Low Hazard 8 ftPawtuckaway Lake/ Drowns Dike
Rockingham, NH
Low Hazard 12 ftPawtuckaway Lake /Drowns Dam
Rockingham, NH
Significant Hazard 18 ftAyers Pond Dam
Strafford, NH
Significant Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Mendums Pond Dam?
Mendums Pond 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 Mendums Pond Dam?
Mendums Pond Dam is owned by NH DES WATER DIVISION (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mendums Pond Dam built?
Mendums Pond Dam was completed in 1840, making it 186 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 Mendums Pond Dam?
Mendums Pond 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 Mendums Pond Dam?
Mendums Pond Dam has a dam height of 31 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 Mendums Pond Dam last inspected?
Mendums Pond Dam was last inspected on August 31, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.