Eureka Lake Dam
Key Takeaway
Eureka Lake Dam is classified as significant hazard in Illinois. It was completed in 1942 and is 84 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 33 ft (taller than 71.6% in IL) |
| Dam Length | 536 ft |
| Dam Type | Earth |
| Max Storage | 404 acre-ft |
| Normal Storage | 290 acre-ft |
| Surface Area | 30 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,271 cfs |
| Year Completed | 1942 (84 years old) |
| NID ID | IL00349 |
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 EUREKA
Local Government
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Low Hazard 31 ftFrequently Asked Questions
What is the hazard classification of Eureka Lake Dam?
Eureka 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 Eureka Lake Dam?
Eureka Lake Dam is owned by CITY OF EUREKA (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Eureka Lake Dam built?
Eureka Lake Dam was completed in 1942, making it 84 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 Eureka Lake Dam?
Eureka Lake Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Eureka Lake Dam?
Eureka Lake Dam has a dam height of 33 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 Eureka Lake Dam last inspected?
Eureka Lake Dam was last inspected on June 20, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.