Gannon Dam
Key Takeaway
Gannon Dam is classified as low hazard in Iowa. It was completed in 1970 and is 56 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 20 ft (taller than 7.5% in IA) |
| Dam Length | 387 ft |
| Dam Type | Earth |
| Max Storage | 60 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1970 (56 years old) |
| NID ID | IA00531 |
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
WJ Gannon
Private
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Low Hazard 40 ftFrequently Asked Questions
What is the hazard classification of Gannon Dam?
Gannon 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 Gannon Dam?
Gannon Dam is owned by WJ Gannon (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Gannon Dam built?
Gannon Dam was completed in 1970, making it 56 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 Gannon Dam?
Gannon Dam serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Gannon Dam?
Gannon 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.
When was Gannon Dam last inspected?
Gannon Dam was last inspected on April 6, 1977. Inspection dates indicate when a formal review occurred, not the results of that inspection.