Greenwood Lake Dam
Key Takeaway
Greenwood Lake Dam is classified as significant hazard in Illinois. It was completed in 1960 and is 66 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 | 900 ft |
| Dam Type | Earth |
| Max Storage | 114 acre-ft |
| Normal Storage | 65 acre-ft |
| Year Completed | 1960 (66 years old) |
| NID ID | IL00513 |
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
GREENWOOD LAKE ASSOCIATION
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Greenwood Lake Dam?
Greenwood 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 Greenwood Lake Dam?
Greenwood Lake Dam is owned by GREENWOOD LAKE ASSOCIATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Greenwood Lake Dam built?
Greenwood Lake Dam was completed in 1960, making it 66 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 Greenwood Lake Dam?
Greenwood 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 Greenwood Lake Dam?
Greenwood 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 Greenwood Lake Dam last inspected?
Greenwood Lake Dam was last inspected on June 28, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.