Johnson Lake Dam
Key Takeaway
Johnson Lake Dam is classified as significant hazard in Texas. It was completed in 1961 and is 65 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 38 ft (taller than 82.5% in TX) |
| Dam Length | 425 ft |
| Dam Type | Earth |
| Max Storage | 159 acre-ft |
| Normal Storage | 82 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 4,413 cfs |
| Year Completed | 1961 (65 years old) |
| NID ID | TX02911 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
BENNY JOHNSON;RANCH AT WALNUT SPRINGS LLC
Private
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Significant Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Johnson Lake Dam?
Johnson Lake Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Johnson Lake Dam?
Johnson Lake Dam is owned by BENNY JOHNSON;RANCH AT WALNUT SPRINGS LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnson Lake Dam built?
Johnson Lake Dam was completed in 1961, making it 65 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 Johnson Lake Dam?
Johnson Lake Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Johnson Lake Dam?
Johnson Lake Dam has a dam height of 38 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 Johnson Lake Dam last inspected?
Johnson Lake Dam was last inspected on June 30, 2010. Inspection dates indicate when a formal review occurred, not the results of that inspection.