Souhegan River Site 26 Dam
Key Takeaway
Souhegan River Site 26 Dam is classified as high hazard in New Hampshire. It was completed in 1965 and is 61 years old. Its primary use is flood risk reduction. 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 | 79 ft (taller than 98.5% in NH) |
| Dam Length | 675 ft |
| Dam Type | Earth |
| Max Storage | 1.5K acre-ft |
| Normal Storage | 28 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 12,544 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | NH00207 |
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
Nearby Dams
Souhegan River Site 25b Dam
Hillsborough, NH
High Hazard 74 ftBurton Pond Dam
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Low Hazard 14 ftSouhegan River Site 10a Dam
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High Hazard 59 ftSouhegan River Site 12a North Dike
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High Hazard 39 ftPeters Farm Pond Dam
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Significant Hazard 9 ftSouhegan River Site 28 Dam
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High Hazard 29 ftSouhegan River Site 12a South Dam
Hillsborough, NH
High Hazard 38 ftSouhegan River Site 15 Dam
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Significant Hazard 13 ftFrequently Asked Questions
What is the hazard classification of Souhegan River Site 26 Dam?
Souhegan River Site 26 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 Souhegan River Site 26 Dam?
Souhegan River Site 26 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 Souhegan River Site 26 Dam built?
Souhegan River Site 26 Dam was completed in 1965, making it 61 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 Souhegan River Site 26 Dam?
Souhegan River Site 26 Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Souhegan River Site 26 Dam?
Souhegan River Site 26 Dam has a dam height of 79 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 Souhegan River Site 26 Dam last inspected?
Souhegan River Site 26 Dam was last inspected on October 25, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.