Neffs Lake Dam
Key Takeaway
Neffs Lake Dam is classified as low hazard in Illinois. It was completed in 1963 and is 63 years old. Its primary use is recreation.
Physical Details
| Dam Height | 22 ft (taller than 35.1% in IL) |
| Dam Length | 310 ft |
| Dam Type | Earth |
| Max Storage | 56 acre-ft |
| Normal Storage | 50 acre-ft |
| Year Completed | 1963 (63 years old) |
| NID ID | IL00440 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
SOUTHERN GARDENS INC.
Private
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High Hazard 21 ftFrequently Asked Questions
What is the hazard classification of Neffs Lake Dam?
Neffs Lake Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Neffs Lake Dam?
Neffs Lake Dam is owned by SOUTHERN GARDENS INC. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Neffs Lake Dam built?
Neffs Lake Dam was completed in 1963, making it 63 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 Neffs Lake Dam?
Neffs 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 Neffs Lake Dam?
Neffs 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 Neffs Lake Dam last inspected?
Neffs Lake Dam was last inspected on July 18, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.