Williamson Dam
Key Takeaway
Williamson Dam is classified as high hazard in Texas. It was completed in 1923 and is 103 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 | 96 ft (taller than 99.2% in TX) |
| Dam Length | 1,064 ft |
| Dam Type | Buttress |
| Max Storage | 32.8K acre-ft |
| Normal Storage | 26.0K acre-ft |
| Surface Area | 1,817 acres |
| Drainage Area | 26 sq mi |
| Max Discharge | 25,600 cfs |
| Year Completed | 1923 (103 years old) |
| NID ID | TX01409 |
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 CISCO
Local Government
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High Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Williamson Dam?
Williamson 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 Williamson Dam?
Williamson Dam is owned by CITY OF CISCO (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Williamson Dam built?
Williamson Dam was completed in 1923, making it 103 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 Williamson Dam?
Williamson Dam serves the following purposes: Water Supply, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Williamson Dam?
Williamson Dam has a dam height of 96 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 Williamson Dam last inspected?
Williamson Dam was last inspected on September 14, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.