Sanborn Pond Grist Mill Dam
Key Takeaway
Sanborn Pond Grist Mill Dam is classified as high hazard in New Hampshire. It was completed in 1830 and is 196 years old. Its primary use is other. 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 | 16 ft (taller than 54.9% in NH) |
| Dam Length | 265 ft |
| Dam Type | Earth |
| Max Storage | 1.1K acre-ft |
| Normal Storage | 470 acre-ft |
| Surface Area | 125 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 645 cfs |
| Year Completed | 1830 (196 years old) |
| Year Modified | 2011 |
| NID ID | NH00182 |
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
SANBORN MILLS INC
Private
Nearby Dams
Sanborn Sawmill Dam
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High Hazard 13 ftRollins Pond Dam
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Low Hazard 17 ftPittsfield Mill Dam
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High Hazard 21 ftShellcamp Pond Dam
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Low Hazard 12 ftWhites Pond Dam and Dike
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High Hazard 15 ftPittsfield Sewage Lagoon Dam
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Significant Hazard 18 ftDeer Meadow Pond Dam
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Low Hazard 15 ftBarnstead Parade Dam
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High Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Sanborn Pond Grist Mill Dam?
Sanborn Pond Grist Mill 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 Sanborn Pond Grist Mill Dam?
Sanborn Pond Grist Mill Dam is owned by SANBORN MILLS INC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Sanborn Pond Grist Mill Dam built?
Sanborn Pond Grist Mill Dam was completed in 1830, making it 196 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 Sanborn Pond Grist Mill Dam?
Sanborn Pond Grist Mill Dam serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Sanborn Pond Grist Mill Dam?
Sanborn Pond Grist Mill 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 Sanborn Pond Grist Mill Dam last inspected?
Sanborn Pond Grist Mill Dam was last inspected on November 4, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.