Johnston Lake Dam
Key Takeaway
Johnston Lake Dam is classified as low hazard in Texas. It was completed in 1956 and is 70 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 20 ft (taller than 33.5% in TX) |
| Dam Length | 1,200 ft |
| Dam Type | Earth |
| Max Storage | 184 acre-ft |
| Normal Storage | 67 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1956 (70 years old) |
| NID ID | TX02573 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
LAURA F JOHNSTON ET AL
Private
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Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Johnston Lake Dam?
Johnston Lake Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Johnston Lake Dam?
Johnston Lake Dam is owned by LAURA F JOHNSTON ET AL (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnston Lake Dam built?
Johnston Lake Dam was completed in 1956, making it 70 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 Johnston Lake Dam?
Johnston Lake Dam serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Johnston Lake Dam?
Johnston Lake Dam has a dam height of 20 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.