Souhegan Site 8 Dam
Key Takeaway
Souhegan Site 8 Dam is classified as high hazard in New Hampshire. It was completed in 1977 and is 49 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 | 25 ft (taller than 80.2% in NH) |
| Dam Length | 570 ft |
| Dam Type | Earth |
| Max Storage | 2.7K acre-ft |
| Normal Storage | 180 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 7,030 cfs |
| Year Completed | 1977 (49 years old) |
| NID ID | NH00474 |
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 Site 8 Cemetery Dike
Hillsborough, NH
Low Hazard 16 ftSouhegan Site 8 South Dike
Hillsborough, NH
Low Hazard 9 ftSouhegan River Site 33 Dam
Hillsborough, NH
High Hazard 21 ftNew Wilton Reservoir Dam
Hillsborough, NH
High Hazard 24 ftSouhegan River Site 28 Dam
Hillsborough, NH
High Hazard 29 ftSouhegan River Site 10a Dam
Hillsborough, NH
High Hazard 59 ftBurton Pond Dam
Hillsborough, NH
Low Hazard 14 ftWs Packaging Canal Dam
Hillsborough, NH
High Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Souhegan Site 8 Dam?
Souhegan Site 8 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 Site 8 Dam?
Souhegan Site 8 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 Site 8 Dam built?
Souhegan Site 8 Dam was completed in 1977, making it 49 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 Site 8 Dam?
Souhegan Site 8 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 Site 8 Dam?
Souhegan Site 8 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 Souhegan Site 8 Dam last inspected?
Souhegan Site 8 Dam was last inspected on October 25, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.