Margerie Lake Reservoir South Dam
Key Takeaway
Margerie Lake Reservoir South Dam is classified as high hazard in Connecticut. It was completed in 1933 and is 93 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 | 29 ft (taller than 86.8% in CT) |
| Dam Length | 740 ft |
| Dam Type | Earth |
| Max Storage | 6.1K acre-ft |
| Normal Storage | 4.3K acre-ft |
| Surface Area | 308 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,600 cfs |
| Year Completed | 1933 (93 years old) |
| NID ID | CT00063 |
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 Danbury
Local Government
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What is the hazard classification of Margerie Lake Reservoir South Dam?
Margerie Lake Reservoir South 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 Margerie Lake Reservoir South Dam?
Margerie Lake Reservoir South Dam is owned by City of Danbury (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Margerie Lake Reservoir South Dam built?
Margerie Lake Reservoir South Dam was completed in 1933, making it 93 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 Margerie Lake Reservoir South Dam?
Margerie Lake Reservoir South 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 Margerie Lake Reservoir South Dam?
Margerie Lake Reservoir South Dam has a dam height of 29 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 Margerie Lake Reservoir South Dam last inspected?
Margerie Lake Reservoir South Dam was last inspected on October 22, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.