Lake Jaycee Dam
Key Takeaway
Lake Jaycee Dam is classified as significant hazard in Illinois. It was completed in 1905 and is 121 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 61.3% in IL) |
| Dam Length | 875 ft |
| Dam Type | Earth |
| Max Storage | 2.1K acre-ft |
| Normal Storage | 1.0K acre-ft |
| Surface Area | 115 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 3,257 cfs |
| Year Completed | 1905 (121 years old) |
| Year Modified | 1997 |
| NID ID | IL00170 |
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
CITY OF MOUNT VERNON
Local Government
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Low Hazard 29 ftFrequently Asked Questions
What is the hazard classification of Lake Jaycee Dam?
Lake Jaycee 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 Lake Jaycee Dam?
Lake Jaycee Dam is owned by CITY OF MOUNT VERNON (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Jaycee Dam built?
Lake Jaycee Dam was completed in 1905, making it 121 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 Jaycee Dam?
Lake Jaycee Dam serves the following purposes: Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lake Jaycee Dam?
Lake Jaycee Dam has a dam height of 30 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 Jaycee Dam last inspected?
Lake Jaycee Dam was last inspected on November 19, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.