Holt Pond Dam
Key Takeaway
Holt Pond Dam is classified as low hazard in New Hampshire. It was completed in 1890 and is 136 years old. Its primary use is water supply.
Physical Details
| Dam Height | 13 ft (taller than 36.5% in NH) |
| Dam Length | 310 ft |
| Dam Type | Concrete |
| Max Storage | 333 acre-ft |
| Normal Storage | 61 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 22 sq mi |
| Year Completed | 1890 (136 years old) |
| Year Modified | 1998 |
| NID ID | NH00327 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
PENNICHUCK WATER WORKS INC
Private
Nearby Dams
Bowers Dam
Hillsborough, NH
High Hazard 25 ftHarris Pond Dam
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High Hazard 35 ftStump Pond Dam
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Low Hazard 16 ftSupply Pond Dam
Hillsborough, NH
High Hazard 28 ftMine Falls
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Low Hazard 16 ftNashua Canal Dam and Dike
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Low Hazard 11 ftJackson Mills
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Significant Hazard 33 ftDunklee Pond Dam
Hillsborough, NH
Low Hazard 9 ftFrequently Asked Questions
What is the hazard classification of Holt Pond Dam?
Holt Pond Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Holt Pond Dam?
Holt Pond Dam is owned by PENNICHUCK WATER WORKS INC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Holt Pond Dam built?
Holt Pond Dam was completed in 1890, making it 136 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 Holt Pond Dam?
Holt Pond Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Holt Pond Dam?
Holt Pond Dam has a dam height of 13 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 Holt Pond Dam last inspected?
Holt Pond Dam was last inspected on November 20, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.