Ballard Pond Mill Dam
Key Takeaway
Ballard Pond Mill Dam is classified as significant hazard in New Hampshire. It was completed in 1941 and is 85 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 21 ft (taller than 74.5% in NH) |
| Dam Length | 300 ft |
| Dam Type | Earth |
| Max Storage | 61 acre-ft |
| Normal Storage | 39 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 1,348 cfs |
| Year Completed | 1941 (85 years old) |
| Year Modified | 2012 |
| NID ID | NH00183 |
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
NH DES WATER DIVISION
State Government
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Low Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Ballard Pond Mill Dam?
Ballard Pond Mill 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 Ballard Pond Mill Dam?
Ballard Pond Mill 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 Ballard Pond Mill Dam built?
Ballard Pond Mill Dam was completed in 1941, making it 85 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 Ballard Pond Mill Dam?
Ballard Pond Mill 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 Ballard Pond Mill Dam?
Ballard Pond Mill Dam has a dam height of 21 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 Ballard Pond Mill Dam last inspected?
Ballard Pond Mill Dam was last inspected on September 15, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.