Lake Konomoc Dam
Key Takeaway
Lake Konomoc Dam is classified as high hazard in Connecticut. It was completed in 1872 and is 154 years old. Its primary use is water supply. 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 | 23 ft (taller than 80% in CT) |
| Dam Length | 540 ft |
| Dam Type | Earth |
| Max Storage | 4.6K acre-ft |
| Normal Storage | 4.6K acre-ft |
| Surface Area | 363 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1872 (154 years old) |
| NID ID | CT00152 |
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
City of New London
Local Government
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Significant Hazard 22 ftFrequently Asked Questions
What is the hazard classification of Lake Konomoc Dam?
Lake Konomoc 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 Lake Konomoc Dam?
Lake Konomoc Dam is owned by City of New London (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Konomoc Dam built?
Lake Konomoc Dam was completed in 1872, making it 154 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 Lake Konomoc Dam?
Lake Konomoc Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lake Konomoc Dam?
Lake Konomoc Dam has a dam height of 23 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 Lake Konomoc Dam last inspected?
Lake Konomoc Dam was last inspected on October 22, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.