Derry Dam
Key Takeaway
Derry Dam is classified as low hazard in Iowa. It was completed in 1983 and is 43 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 32 ft (taller than 58.4% in IA) |
| Dam Length | 800 ft |
| Dam Type | Earth |
| Max Storage | 119 acre-ft |
| Normal Storage | 35 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1983 (43 years old) |
| NID ID | IA02210 |
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
Delmar Derry
Private
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What is the hazard classification of Derry Dam?
Derry 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 Derry Dam?
Derry Dam is owned by Delmar Derry (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Derry Dam built?
Derry Dam was completed in 1983, making it 43 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 Derry Dam?
Derry Dam serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Derry Dam?
Derry Dam has a dam height of 32 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.