Herbert Hoover Dike
Key Takeaway
Herbert Hoover Dike is classified as high hazard in Florida. It was completed in 1965 and is 61 years old. Its primary use is flood risk reduction. 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 | 35 ft (taller than 75.5% in FL) |
| Dam Length | 739,200 ft |
| Dam Type | Earth |
| Max Storage | 8.5M acre-ft |
| Normal Storage | 4.6M acre-ft |
| Surface Area | 467,200 acres |
| Drainage Area | 5,600 sq mi |
| Max Discharge | 16,600 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | FL36001 |
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
USACE - Jacksonville District
Federal Government
Frequently Asked Questions
What is the hazard classification of Herbert Hoover Dike?
Herbert Hoover Dike 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 Herbert Hoover Dike?
Herbert Hoover Dike is owned by USACE - Jacksonville District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Herbert Hoover Dike built?
Herbert Hoover Dike was completed in 1965, making it 61 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 Herbert Hoover Dike?
Herbert Hoover Dike serves the following purposes: Flood Risk Reduction, Irrigation, Navigation, Fish And Wildlife Pond, Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Herbert Hoover Dike?
Herbert Hoover Dike has a dam height of 35 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 Herbert Hoover Dike last inspected?
Herbert Hoover Dike was last inspected on March 28, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.