Mallard Marsh Dam No 1
Key Takeaway
Mallard Marsh Dam No 1 is classified as low hazard in Iowa. It was completed in 1967 and is 59 years old. Its primary use is recreation.
Physical Details
| Dam Height | 8 ft (taller than 0.7% in IA) |
| Dam Length | 650 ft |
| Dam Type | Earth |
| Max Storage | 156 acre-ft |
| Normal Storage | 52 acre-ft |
| Surface Area | 26 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1967 (59 years old) |
| NID ID | IA00177 |
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
Cerro Gordo County Conservation Board
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Mallard Marsh Dam No 1?
Mallard Marsh Dam No 1 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 Mallard Marsh Dam No 1?
Mallard Marsh Dam No 1 is owned by Cerro Gordo County Conservation Board (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mallard Marsh Dam No 1 built?
Mallard Marsh Dam No 1 was completed in 1967, making it 59 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 Mallard Marsh Dam No 1?
Mallard Marsh Dam No 1 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 Mallard Marsh Dam No 1?
Mallard Marsh Dam No 1 has a dam height of 8 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.