Upper Millpond Dam
Key Takeaway
Upper Millpond Dam is classified as significant hazard in Connecticut. It was completed in 1820 and is 206 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 11 ft (taller than 37.9% in CT) |
| Dam Length | 120 ft |
| Dam Type | Earth |
| Max Storage | 50 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 413 cfs |
| Year Completed | 1820 (206 years old) |
| NID ID | CT00417 |
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
Richard O'Connor Trustee
Private
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Significant Hazard 9 ftFrequently Asked Questions
What is the hazard classification of Upper Millpond Dam?
Upper Millpond 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 Upper Millpond Dam?
Upper Millpond Dam is owned by Richard O'Connor Trustee (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Millpond Dam built?
Upper Millpond Dam was completed in 1820, making it 206 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 Upper Millpond Dam?
Upper Millpond 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 Upper Millpond Dam?
Upper Millpond Dam has a dam height of 11 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 Upper Millpond Dam last inspected?
Upper Millpond Dam was last inspected on August 29, 2016. Inspection dates indicate when a formal review occurred, not the results of that inspection.