Deep River Reservoir Dam
Key Takeaway
Deep River Reservoir Dam is classified as high hazard in Connecticut. It was completed in 1926 and is 100 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 | 62 ft (taller than 97% in CT) |
| Dam Length | 900 ft |
| Dam Type | Earth |
| Max Storage | 8.5K acre-ft |
| Normal Storage | 4.5K acre-ft |
| Surface Area | 320 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 18,860 cfs |
| Year Completed | 1926 (100 years old) |
| NID ID | CT00346 |
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 Norwich
Local Government
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High Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Deep River Reservoir Dam?
Deep River Reservoir 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 Deep River Reservoir Dam?
Deep River Reservoir Dam is owned by City of Norwich (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Deep River Reservoir Dam built?
Deep River Reservoir Dam was completed in 1926, making it 100 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 Deep River Reservoir Dam?
Deep River Reservoir 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 Deep River Reservoir Dam?
Deep River Reservoir Dam has a dam height of 62 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 Deep River Reservoir Dam last inspected?
Deep River Reservoir Dam was last inspected on July 21, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.