Polk County Roadgrade Dam 21-78-22
Key Takeaway
Polk County Roadgrade Dam 21-78-22 is classified as low hazard in Iowa. It was completed in 1992 and is 34 years old. Its primary use is other.
Physical Details
| Dam Height | 41 ft (taller than 86.2% in IA) |
| Dam Length | 803 ft |
| Dam Type | Earth |
| Max Storage | 112 acre-ft |
| Normal Storage | 65 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1992 (34 years old) |
| NID ID | IA02659 |
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
Polk County Public Works Dept
Local Government
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Low Hazard 26 ftFrequently Asked Questions
What is the hazard classification of Polk County Roadgrade Dam 21-78-22?
Polk County Roadgrade Dam 21-78-22 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 Polk County Roadgrade Dam 21-78-22?
Polk County Roadgrade Dam 21-78-22 is owned by Polk County Public Works Dept (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Polk County Roadgrade Dam 21-78-22 built?
Polk County Roadgrade Dam 21-78-22 was completed in 1992, making it 34 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 Polk County Roadgrade Dam 21-78-22?
Polk County Roadgrade Dam 21-78-22 serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Polk County Roadgrade Dam 21-78-22?
Polk County Roadgrade Dam 21-78-22 has a dam height of 41 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.