Squannacook River Dam
Key Takeaway
Squannacook River Dam is classified as high hazard in Massachusetts. 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 | 18 ft (taller than 63.9% in MA) |
| Dam Length | 150 ft |
| Dam Type | Concrete |
| Max Storage | 110 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 1 sq mi |
| NID ID | MA00442 |
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 GROTON, BOARD OF SELECTMEN
Local Government
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Significant Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Squannacook River Dam?
Squannacook River 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 Squannacook River Dam?
Squannacook River Dam is owned by TOWN OF GROTON, BOARD OF SELECTMEN (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
What is the primary purpose of Squannacook River Dam?
Squannacook River 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 Squannacook River Dam?
Squannacook River Dam has a dam height of 18 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 Squannacook River Dam last inspected?
Squannacook River Dam was last inspected on October 17, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.