Upper Mulberry River WS Str. # 11
Key Takeaway
Upper Mulberry River WS Str. # 11 is classified as high hazard in Georgia. It was completed in 1970 and is 56 years old. Its primary use is flood risk reduction. 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 | 46 ft (taller than 94.9% in GA) |
| Dam Length | 740 ft |
| Dam Type | Earth |
| Max Storage | 3.9K acre-ft |
| Surface Area | 45 acres |
| Drainage Area | 4,105 sq mi |
| Year Completed | 1970 (56 years old) |
| NID ID | GA01906 |
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
Gwinnett County S&WCD Gwinnett County Board of Commissioners
State Government
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What is the hazard classification of Upper Mulberry River WS Str. # 11?
Upper Mulberry River WS Str. # 11 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 Upper Mulberry River WS Str. # 11?
Upper Mulberry River WS Str. # 11 is owned by Gwinnett County S&WCD Gwinnett County Board of Commissioners (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Mulberry River WS Str. # 11 built?
Upper Mulberry River WS Str. # 11 was completed in 1970, making it 56 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 Mulberry River WS Str. # 11?
Upper Mulberry River WS Str. # 11 serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Upper Mulberry River WS Str. # 11?
Upper Mulberry River WS Str. # 11 has a dam height of 46 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 Mulberry River WS Str. # 11 last inspected?
Upper Mulberry River WS Str. # 11 was last inspected on March 9, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.