Pearl Lake Dam
Key Takeaway
Pearl Lake Dam is classified as low hazard in New Hampshire. It was completed in 1930 and is 96 years old. Its primary use is recreation.
Physical Details
| Dam Height | 10 ft (taller than 16% in NH) |
| Dam Length | 70 ft |
| Dam Type | Concrete |
| Max Storage | 552 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 62 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 1,076 cfs |
| Year Completed | 1930 (96 years old) |
| NID ID | NH00573 |
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
TOWN OF LISBON
Local Government
Nearby Dams
Lower Lisbon
Grafton, NH
Low Hazard 18 ftChandler Pond Dam
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Significant Hazard 14 ftLisbon Wastewater Lagoons Dam
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Low Hazard 13 ftAmmonoosuc River
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Low Hazard 17 ftCoffin Pond Dam
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Low Hazard 10 ftLower Mountain Lake Dam
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Significant Hazard 33 ftUpper Mountain Lake Dam
Grafton, NH
Low Hazard 31 ftFrequently Asked Questions
What is the hazard classification of Pearl Lake Dam?
Pearl Lake 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 Pearl Lake Dam?
Pearl Lake Dam is owned by TOWN OF LISBON (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pearl Lake Dam built?
Pearl Lake Dam was completed in 1930, making it 96 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 Pearl Lake Dam?
Pearl Lake 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 Pearl Lake Dam?
Pearl Lake 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 Pearl Lake Dam last inspected?
Pearl Lake Dam was last inspected on October 5, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.