Jonbar Ranch Dam
Key Takeaway
Jonbar Ranch Dam is classified as low hazard in Iowa. It was completed in 1966 and is 60 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 33 ft (taller than 63.3% in IA) |
| Dam Length | 472 ft |
| Dam Type | Earth |
| Max Storage | 104 acre-ft |
| Normal Storage | 62 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1966 (60 years old) |
| NID ID | IA00285 |
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
Jonbar Ranch
Private
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What is the hazard classification of Jonbar Ranch Dam?
Jonbar Ranch 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 Jonbar Ranch Dam?
Jonbar Ranch Dam is owned by Jonbar Ranch (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Jonbar Ranch Dam built?
Jonbar Ranch Dam was completed in 1966, making it 60 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 Jonbar Ranch Dam?
Jonbar Ranch 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 Jonbar Ranch Dam?
Jonbar Ranch Dam has a dam height of 33 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 Jonbar Ranch Dam last inspected?
Jonbar Ranch Dam was last inspected on October 11, 1967. Inspection dates indicate when a formal review occurred, not the results of that inspection.