John May Dam No 1
Key Takeaway
John May Dam No 1 is classified as high hazard in Texas. It was completed in 1945 and is 81 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 | 19 ft (taller than 30.6% in TX) |
| Dam Length | 625 ft |
| Dam Type | Earth |
| Max Storage | 216 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 2 cfs |
| Year Completed | 1945 (81 years old) |
| NID ID | TX04015 |
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
ANTHONY COOPER
Private
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What is the hazard classification of John May Dam No 1?
John May Dam No 1 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 John May Dam No 1?
John May Dam No 1 is owned by ANTHONY COOPER (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was John May Dam No 1 built?
John May Dam No 1 was completed in 1945, making it 81 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 John May Dam No 1?
John May Dam No 1 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 John May Dam No 1?
John May Dam No 1 has a dam height of 19 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 John May Dam No 1 last inspected?
John May Dam No 1 was last inspected on May 28, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.