Grand Oaks Lake Dam
Key Takeaway
Grand Oaks Lake Dam is classified as significant hazard in Illinois. It was completed in 1978 and is 48 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 22 ft (taller than 35.1% in IL) |
| Dam Length | 285 ft |
| Dam Type | Earth |
| Max Storage | 52 acre-ft |
| Normal Storage | 32 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,390 cfs |
| Year Completed | 1978 (48 years old) |
| NID ID | IL00979 |
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
NORTHERN OAKS ESTATES HOMEOWNERS ASSOC.
Private
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What is the hazard classification of Grand Oaks Lake Dam?
Grand Oaks 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 Grand Oaks Lake Dam?
Grand Oaks Lake Dam is owned by NORTHERN OAKS ESTATES HOMEOWNERS ASSOC. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grand Oaks Lake Dam built?
Grand Oaks Lake Dam was completed in 1978, making it 48 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 Grand Oaks Lake Dam?
Grand Oaks 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 Grand Oaks Lake Dam?
Grand Oaks Lake Dam has a dam height of 22 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 Grand Oaks Lake Dam last inspected?
Grand Oaks Lake Dam was last inspected on April 19, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.