Warren Lake Dam
Key Takeaway
Warren Lake Dam is classified as high hazard in New Hampshire. It was completed in 1771 and is 255 years old. Its primary use is recreation. 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 | 13 ft (taller than 36.5% in NH) |
| Dam Length | 170 ft |
| Dam Type | Earth |
| Max Storage | 1.7K acre-ft |
| Normal Storage | 501 acre-ft |
| Surface Area | 200 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 395 cfs |
| Year Completed | 1771 (255 years old) |
| Year Modified | 1998 |
| NID ID | NH00008 |
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
TOWN OF ALSTEAD
Local Government
Nearby Dams
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Low Hazard 12 ftWalpole Reservoir Dam
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High Hazard 20 ftSurry Mountain Dam
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High Hazard 83 ftRodgers Pond Dam
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Low Hazard 14 ftMill Pond Dam
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Significant Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Warren Lake Dam?
Warren Lake 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 Warren Lake Dam?
Warren Lake Dam is owned by TOWN OF ALSTEAD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Warren Lake Dam built?
Warren Lake Dam was completed in 1771, making it 255 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 Warren Lake Dam?
Warren 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 Warren Lake Dam?
Warren Lake 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 Warren Lake Dam last inspected?
Warren Lake Dam was last inspected on November 4, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.