Upper Mill Pond Dam
Key Takeaway
Upper Mill Pond Dam is classified as significant hazard in Connecticut. It was completed in 1860 and is 166 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 12 ft (taller than 42.4% in CT) |
| Dam Length | 300 ft |
| Dam Type | Earth |
| Max Storage | 36 acre-ft |
| Normal Storage | 31 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 250 cfs |
| Year Completed | 1860 (166 years old) |
| NID ID | CT00141 |
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
Fenner Drives, Inc.
Private
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Significant Hazard 5 ftFrequently Asked Questions
What is the hazard classification of Upper Mill Pond Dam?
Upper Mill Pond 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 Mill Pond Dam?
Upper Mill Pond Dam is owned by Fenner Drives, Inc. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Mill Pond Dam built?
Upper Mill Pond Dam was completed in 1860, making it 166 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 Mill Pond Dam?
Upper Mill Pond 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 Mill Pond Dam?
Upper Mill Pond Dam has a dam height of 12 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 Mill Pond Dam last inspected?
Upper Mill Pond Dam was last inspected on November 11, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.