Kolls Dam
Key Takeaway
Kolls Dam is classified as low hazard in Iowa. It was completed in 1959 and is 67 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 29 ft (taller than 42.8% in IA) |
| Dam Length | 419 ft |
| Dam Type | Earth |
| Max Storage | 72 acre-ft |
| Normal Storage | 45 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1959 (67 years old) |
| NID ID | IA00547 |
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
EW Kolls
Private
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Significant Hazard 28 ftFrequently Asked Questions
What is the hazard classification of Kolls Dam?
Kolls 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 Kolls Dam?
Kolls Dam is owned by EW Kolls (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Kolls Dam built?
Kolls Dam was completed in 1959, making it 67 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 Kolls Dam?
Kolls 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 Kolls Dam?
Kolls Dam has a dam height of 29 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 Kolls Dam last inspected?
Kolls Dam was last inspected on November 30, 1960. Inspection dates indicate when a formal review occurred, not the results of that inspection.