Coralville Dam
Key Takeaway
Coralville Dam is classified as high hazard in Iowa. It was completed in 1958 and is 68 years old. Its primary use is flood risk reduction. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 100 ft (taller than 99.9% in IA) |
| Dam Length | 1,400 ft |
| Dam Type | Gravity |
| Max Storage | 421.0K acre-ft |
| Normal Storage | 28.1K acre-ft |
| Surface Area | 4,050 acres |
| Drainage Area | 3,115 sq mi |
| Max Discharge | 244,000 cfs |
| Year Completed | 1958 (68 years old) |
| NID ID | IA00012 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
USACE - Rock Island District
Federal Government
Nearby Dams
Dovetail Estates Dam
Johnson, IA
Significant Hazard 23 ftStoppelmoor Dam
Johnson, IA
Low Hazard 24 ftBrown Deer Golf Course Dam
Johnson, IA
Significant Hazard 46 ftValley View Heights Dam
Johnson, IA
Low Hazard 29 ftNorth Branch Ralston Creek Dam
Johnson, IA
High Hazard 37 ftCoralville Milldam
Johnson, IA
Low Hazard 13 ftBurlington Street Dam
Johnson, IA
Low Hazard 20 ftNorth Ridge Park Dam
Johnson, IA
Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Coralville Dam?
Coralville Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Coralville Dam?
Coralville Dam is owned by USACE - Rock Island District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Coralville Dam built?
Coralville Dam was completed in 1958, making it 68 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 Coralville Dam?
Coralville Dam serves the following purposes: Flood Risk Reduction, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Coralville Dam?
Coralville Dam has a dam height of 100 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 Coralville Dam last inspected?
Coralville Dam was last inspected on August 6, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.