Highway 71 Dam
Key Takeaway
Highway 71 Dam is classified as high hazard in Texas. It was completed in 1999 and is 27 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 | 26 ft (taller than 55.2% in TX) |
| Dam Length | 730 ft |
| Dam Type | Earth |
| Max Storage | 156 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 14,836 cfs |
| Year Completed | 1999 (27 years old) |
| NID ID | TX07223 |
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 AUSTIN
Local Government
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What is the hazard classification of Highway 71 Dam?
Highway 71 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 Highway 71 Dam?
Highway 71 Dam is owned by CITY OF AUSTIN (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Highway 71 Dam built?
Highway 71 Dam was completed in 1999, making it 27 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 Highway 71 Dam?
Highway 71 Dam 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 Highway 71 Dam?
Highway 71 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 Highway 71 Dam last inspected?
Highway 71 Dam was last inspected on March 20, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.