Sand Pond Dam
Key Takeaway
Sand Pond Dam is classified as significant hazard in New Hampshire. It was completed in 1920 and is 106 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 10 ft (taller than 16% in NH) |
| Dam Length | 349 ft |
| Dam Type | Earth |
| Max Storage | 123 acre-ft |
| Normal Storage | 35 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 1,100 cfs |
| Year Completed | 1920 (106 years old) |
| Year Modified | 1938 |
| NID ID | NH01096 |
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
TOWN OF TROY
Local Government
Nearby Dams
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Significant Hazard 9 ftVillage Pond Dam
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Significant Hazard 15 ftTroy Sewage Lagoons Dam
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Significant Hazard 16 ftRockwood Pond Dam
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Low Hazard 11 ftBowker Pond Dam
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Significant Hazard 14 ftPerkins Pond Dam
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Low Hazard 7 ftMeetinghouse Pond Dam
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Low Hazard 7 ftLarrys Pond Dam
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Low Hazard 19 ftFrequently Asked Questions
What is the hazard classification of Sand Pond Dam?
Sand Pond 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 Sand Pond Dam?
Sand Pond Dam is owned by TOWN OF TROY (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Sand Pond Dam built?
Sand Pond Dam was completed in 1920, making it 106 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 Sand Pond Dam?
Sand 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 Sand Pond Dam?
Sand Pond 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 Sand Pond Dam last inspected?
Sand Pond Dam was last inspected on June 3, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.