Backbone Dam
Key Takeaway
Backbone Dam is classified as significant hazard in Iowa. It was completed in 1938 and is 88 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 33 ft (taller than 63.3% in IA) |
| Dam Length | 908 ft |
| Dam Type | Gravity |
| Max Storage | 1.0K acre-ft |
| Normal Storage | 600 acre-ft |
| Surface Area | 125 acres |
| Drainage Area | 120 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1938 (88 years old) |
| NID ID | IA01965 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Iowa Department of Natural Resources
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Backbone Dam?
Backbone Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Backbone Dam?
Backbone Dam is owned by Iowa Department of Natural Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Backbone Dam built?
Backbone Dam was completed in 1938, making it 88 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 Backbone Dam?
Backbone 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 Backbone Dam?
Backbone Dam has a dam height of 33 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 Backbone Dam last inspected?
Backbone Dam was last inspected on June 10, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.