Quonnipaug Lake Dam
Key Takeaway
Quonnipaug Lake Dam is classified as significant hazard in Connecticut. It was completed in 1850 and is 176 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 5 ft (taller than 5.1% in CT) |
| Dam Length | 110 ft |
| Dam Type | Masonry |
| Max Storage | 336 acre-ft |
| Normal Storage | 336 acre-ft |
| Surface Area | 112 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 53 cfs |
| Year Completed | 1850 (176 years old) |
| NID ID | CT00411 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Town of Guilford
Local Government
Nearby Dams
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Significant Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Quonnipaug Lake Dam?
Quonnipaug Lake Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Quonnipaug Lake Dam?
Quonnipaug Lake Dam is owned by Town of Guilford (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Quonnipaug Lake Dam built?
Quonnipaug Lake Dam was completed in 1850, making it 176 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 Quonnipaug Lake Dam?
Quonnipaug 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 Quonnipaug Lake Dam?
Quonnipaug Lake Dam has a dam height of 5 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 Quonnipaug Lake Dam last inspected?
Quonnipaug Lake Dam was last inspected on March 11, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.