Union Grove Lake Dam
Key Takeaway
Union Grove Lake Dam is classified as significant hazard in Iowa. It was completed in 1920 and is 106 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 29 ft (taller than 42.8% in IA) |
| Dam Length | 1,205 ft |
| Dam Type | Earth |
| Max Storage | 2.1K acre-ft |
| Normal Storage | 770 acre-ft |
| Surface Area | 117 acres |
| Drainage Area | 11 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1920 (106 years old) |
| Year Modified | 1954 |
| NID ID | IA01373 |
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
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Low Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Union Grove Lake Dam?
Union Grove Lake 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 Union Grove Lake Dam?
Union Grove Lake 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 Union Grove Lake Dam built?
Union Grove Lake Dam was completed in 1920, making it 106 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 Union Grove Lake Dam?
Union Grove Lake 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 Union Grove Lake Dam?
Union Grove Lake 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 Union Grove Lake Dam last inspected?
Union Grove Lake Dam was last inspected on June 15, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.