Lake Ohana Dam #1
Key Takeaway
Lake Ohana Dam #1 is classified as significant hazard in Iowa. It was completed in 2007 and is 19 years old. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 46 ft (taller than 92.5% in IA) |
| Dam Length | 1,070 ft |
| Dam Type | Earth |
| Max Storage | 434 acre-ft |
| Normal Storage | 262 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 2007 (19 years old) |
| NID ID | IA03527 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
N-T Lands LLC
Private
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Low Hazard 60 ftFrequently Asked Questions
What is the hazard classification of Lake Ohana Dam #1?
Lake Ohana Dam #1 is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lake Ohana Dam #1?
Lake Ohana Dam #1 is owned by N-T Lands LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Ohana Dam #1 built?
Lake Ohana Dam #1 was completed in 2007, making it 19 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
How tall is Lake Ohana Dam #1?
Lake Ohana Dam #1 has a dam height of 46 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 Lake Ohana Dam #1 last inspected?
Lake Ohana Dam #1 was last inspected on August 1, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.