Willow Lake Dam
Key Takeaway
Willow Lake Dam is classified as low hazard in Iowa. It was completed in 1976 and is 50 years old. Its primary use is debris control.
Physical Details
| Dam Height | 31 ft (taller than 53.8% in IA) |
| Dam Length | 390 ft |
| Dam Type | Earth |
| Max Storage | 44 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1976 (50 years old) |
| NID ID | IA01566 |
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
Harrison County Conservation Board
Local Government
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Low Hazard 41 ftFrequently Asked Questions
What is the hazard classification of Willow Lake Dam?
Willow Lake 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 Willow Lake Dam?
Willow Lake Dam is owned by Harrison County Conservation Board (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Willow Lake Dam built?
Willow Lake Dam was completed in 1976, making it 50 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 Willow Lake Dam?
Willow Lake Dam serves the following purposes: Debris Control, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Willow Lake Dam?
Willow Lake Dam has a dam height of 31 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.