Alsey Lake Dam
Key Takeaway
Alsey Lake Dam is classified as significant hazard in Illinois. It was completed in 1969 and is 57 years old. Its primary use is other. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 27 ft (taller than 51.5% in IL) |
| Dam Length | 290 ft |
| Dam Type | Earth |
| Max Storage | 81 acre-ft |
| Normal Storage | 54 acre-ft |
| Year Completed | 1969 (57 years old) |
| NID ID | IL00811 |
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
ALSEY MANUFACTURING COMPANY
Private
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Significant Hazard 27 ftFrequently Asked Questions
What is the hazard classification of Alsey Lake Dam?
Alsey 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 Alsey Lake Dam?
Alsey Lake Dam is owned by ALSEY MANUFACTURING COMPANY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Alsey Lake Dam built?
Alsey Lake Dam was completed in 1969, making it 57 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 Alsey Lake Dam?
Alsey Lake Dam serves the following purposes: Other, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Alsey Lake Dam?
Alsey Lake Dam has a dam height of 27 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 Alsey Lake Dam last inspected?
Alsey Lake Dam was last inspected on June 25, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.