Lake In The Hills Dam 1
Key Takeaway
Lake In The Hills Dam 1 is classified as high hazard in Illinois. It was completed in 1926 and is 100 years old. Its primary use is recreation. 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 | 40 ft (taller than 83.1% in IL) |
| Dam Length | 780 ft |
| Dam Type | Earth |
| Max Storage | 969 acre-ft |
| Normal Storage | 598 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 14,000 cfs |
| Year Completed | 1926 (100 years old) |
| NID ID | IL00568 |
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
VILLAGE OF LAKE IN THE HILLS
Local Government
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Significant Hazard 13 ftFrequently Asked Questions
What is the hazard classification of Lake In The Hills Dam 1?
Lake In The Hills Dam 1 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 Lake In The Hills Dam 1?
Lake In The Hills Dam 1 is owned by VILLAGE OF LAKE IN THE HILLS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake In The Hills Dam 1 built?
Lake In The Hills Dam 1 was completed in 1926, making it 100 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 Lake In The Hills Dam 1?
Lake In The Hills Dam 1 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 Lake In The Hills Dam 1?
Lake In The Hills Dam 1 has a dam height of 40 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 Lake In The Hills Dam 1 last inspected?
Lake In The Hills Dam 1 was last inspected on November 3, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.