Greendale Lake Dam
Key Takeaway
Greendale Lake Dam is classified as significant hazard in Illinois. It was completed in 1926 and is 100 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 15 ft (taller than 16.3% in IL) |
| Dam Length | 540 ft |
| Dam Type | Earth |
| Max Storage | 311 acre-ft |
| Normal Storage | 170 acre-ft |
| Year Completed | 1926 (100 years old) |
| NID ID | IL00155 |
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
CANADIAN NATIONAL RAILWAY
Private
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Low Hazard 26 ftFrequently Asked Questions
What is the hazard classification of Greendale Lake Dam?
Greendale 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 Greendale Lake Dam?
Greendale Lake Dam is owned by CANADIAN NATIONAL RAILWAY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Greendale Lake Dam built?
Greendale Lake Dam 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 Greendale Lake Dam?
Greendale 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 Greendale Lake Dam?
Greendale Lake Dam has a dam height of 15 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 Greendale Lake Dam last inspected?
Greendale Lake Dam was last inspected on June 8, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.