Lylah Marsh Dam
Key Takeaway
Lylah Marsh Dam is classified as low hazard in Iowa. It was completed in 1960 and is 66 years old. Its primary use is recreation.
Physical Details
| Dam Height | 11 ft (taller than 2.5% in IA) |
| Dam Length | 932 ft |
| Dam Type | Earth |
| Max Storage | 358 acre-ft |
| Normal Storage | 158 acre-ft |
| Surface Area | 53 acres |
| Drainage Area | 21 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1960 (66 years old) |
| NID ID | IA00496 |
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
Howard County Conservation Board
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lylah Marsh Dam?
Lylah Marsh 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 Lylah Marsh Dam?
Lylah Marsh Dam is owned by Howard County Conservation Board (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lylah Marsh Dam built?
Lylah Marsh Dam was completed in 1960, making it 66 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 Lylah Marsh Dam?
Lylah Marsh Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lylah Marsh Dam?
Lylah Marsh Dam has a dam height of 11 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 Lylah Marsh Dam last inspected?
Lylah Marsh Dam was last inspected on December 30, 1965. Inspection dates indicate when a formal review occurred, not the results of that inspection.