Maltby No. 1 Dam
Key Takeaway
Maltby No. 1 Dam is classified as high hazard in Connecticut. It was completed in 1862 and is 164 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 | 26 ft (taller than 84.4% in CT) |
| Dam Length | 240 ft |
| Dam Type | Earth |
| Max Storage | 260 acre-ft |
| Normal Storage | 161 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 520 cfs |
| Year Completed | 1862 (164 years old) |
| Year Modified | 1992 |
| NID ID | CT00111 |
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
South Central CT RWA
Public Utility
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Significant Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Maltby No. 1 Dam?
Maltby No. 1 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 Maltby No. 1 Dam?
Maltby No. 1 Dam is owned by South Central CT RWA (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Maltby No. 1 Dam built?
Maltby No. 1 Dam was completed in 1862, making it 164 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 Maltby No. 1 Dam?
Maltby No. 1 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 Maltby No. 1 Dam?
Maltby No. 1 Dam has a dam height of 26 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 Maltby No. 1 Dam last inspected?
Maltby No. 1 Dam was last inspected on November 6, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.