Hewlett Lake Dam
Key Takeaway
Hewlett Lake Dam is classified as high hazard in Missouri. It was completed in 1967 and is 59 years old. Its primary use is recreation. 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 | 25 ft (taller than 23.5% in MO) |
| Dam Type | Earth |
| Max Storage | 40 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 35 sq mi |
| Year Completed | 1967 (59 years old) |
| NID ID | MO40095 |
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
MRS O.M. HEWLETT
Private
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High Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Hewlett Lake Dam?
Hewlett Lake 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 Hewlett Lake Dam?
Hewlett Lake Dam is owned by MRS O.M. HEWLETT (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hewlett Lake Dam built?
Hewlett Lake Dam was completed in 1967, making it 59 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 Hewlett Lake Dam?
Hewlett 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 Hewlett Lake Dam?
Hewlett Lake Dam has a dam height of 25 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.