Marion County Roadgrade Dam 17/76/18
Key Takeaway
Marion County Roadgrade Dam 17/76/18 is classified as significant hazard in Iowa. It was completed in 1965 and is 61 years old. Its primary use is other. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 40 ft (taller than 84% in IA) |
| Dam Length | 1,000 ft |
| Dam Type | Earth |
| Max Storage | 1.1K acre-ft |
| Normal Storage | 324 acre-ft |
| Surface Area | 41 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | IA00667 |
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
Marion County Board of Supervisors
Local Government
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What is the hazard classification of Marion County Roadgrade Dam 17/76/18?
Marion County Roadgrade Dam 17/76/18 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 Marion County Roadgrade Dam 17/76/18?
Marion County Roadgrade Dam 17/76/18 is owned by Marion County Board of Supervisors (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Marion County Roadgrade Dam 17/76/18 built?
Marion County Roadgrade Dam 17/76/18 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 Marion County Roadgrade Dam 17/76/18?
Marion County Roadgrade Dam 17/76/18 serves the following purposes: Other, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Marion County Roadgrade Dam 17/76/18?
Marion County Roadgrade Dam 17/76/18 has a dam height of 40 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 Marion County Roadgrade Dam 17/76/18 last inspected?
Marion County Roadgrade Dam 17/76/18 was last inspected on June 1, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.