Blalock Reservoir Dam
Key Takeaway
Blalock Reservoir Dam is classified as high hazard in Georgia. It was completed in 1988 and is 38 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 | 39 ft (taller than 90.9% in GA) |
| Dam Type | Earth |
| Max Storage | 6.2K acre-ft |
| Normal Storage | 4.1K acre-ft |
| Year Completed | 1988 (38 years old) |
| NID ID | GA04534 |
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
Clayton County Water Authority
Local Government
Nearby Dams
Mcelroy Lake Dam
Henry, GA
Low Hazard 26 ftHarbin Lake Dam
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Low Hazard 35 ftRum Ridge Lake Dam
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High Hazard 37 ftLake Erma Dam
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Low Hazard 37 ftFrequently Asked Questions
What is the hazard classification of Blalock Reservoir Dam?
Blalock 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 Blalock Reservoir Dam?
Blalock Reservoir Dam is owned by Clayton County Water Authority (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Blalock Reservoir Dam built?
Blalock Reservoir Dam was completed in 1988, making it 38 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 Blalock Reservoir Dam?
Blalock 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 Blalock Reservoir Dam?
Blalock Reservoir Dam has a dam height of 39 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 Blalock Reservoir Dam last inspected?
Blalock Reservoir Dam was last inspected on January 12, 2016. Inspection dates indicate when a formal review occurred, not the results of that inspection.