Deering Reservoir Dam
Key Takeaway
Deering Reservoir Dam is classified as high hazard in New Hampshire. It was completed in 1940 and is 86 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 | 25 ft (taller than 80.2% in NH) |
| Dam Length | 873 ft |
| Dam Type | Earth |
| Max Storage | 3.1K acre-ft |
| Normal Storage | 2.7K acre-ft |
| Surface Area | 323 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 3,839 cfs |
| Year Completed | 1940 (86 years old) |
| Year Modified | 2007 |
| NID ID | NH00282 |
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
NH DES WATER DIVISION
State Government
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Significant Hazard 13 ftFrequently Asked Questions
What is the hazard classification of Deering Reservoir Dam?
Deering Reservoir 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 Deering Reservoir Dam?
Deering Reservoir Dam is owned by NH DES WATER DIVISION (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Deering Reservoir Dam built?
Deering Reservoir Dam was completed in 1940, making it 86 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 Deering Reservoir Dam?
Deering Reservoir 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 Deering Reservoir Dam?
Deering Reservoir Dam has a dam height of 25 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 Deering Reservoir Dam last inspected?
Deering Reservoir Dam was last inspected on June 9, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.