Highland Lake Dam
Key Takeaway
Highland Lake Dam is classified as significant hazard in New Hampshire. It was completed in 1935 and is 91 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 | 180 ft |
| Dam Type | Earth |
| Max Storage | 1.1K acre-ft |
| Normal Storage | 440 acre-ft |
| Surface Area | 210 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 670 cfs |
| Year Completed | 1935 (91 years old) |
| Year Modified | 2008 |
| NID ID | NH00035 |
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 ANDOVER
Local Government
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Significant Hazard 15 ftFranklin Falls Dam
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High Hazard 116 ftEastman Falls
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Significant Hazard 43 ftRagged Mountain Snow Pond Dam
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Low Hazard 49 ftCole Pond Dam
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Low Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Highland Lake Dam?
Highland Lake 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 Highland Lake Dam?
Highland Lake Dam is owned by TOWN OF ANDOVER (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Highland Lake Dam built?
Highland Lake Dam was completed in 1935, making it 91 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 Highland Lake Dam?
Highland 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 Highland Lake Dam?
Highland 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 Highland Lake Dam last inspected?
Highland Lake Dam was last inspected on September 20, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.