Mermet Dam
Key Takeaway
Mermet Dam is classified as low hazard in Illinois. It was completed in 1950 and is 76 years old. Its primary use is recreation.
Physical Details
| Dam Height | 10 ft (taller than 5.7% in IL) |
| Dam Length | 20,000 ft |
| Dam Type | Earth |
| Max Storage | 2.8K acre-ft |
| Normal Storage | 904 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 150 cfs |
| Year Completed | 1950 (76 years old) |
| NID ID | IL50071 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
ILLINOIS DEPARTMENT OF NATURAL RESOURCES
State Government
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Significant Hazard 49 ftFrequently Asked Questions
What is the hazard classification of Mermet Dam?
Mermet Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Mermet Dam?
Mermet Dam is owned by ILLINOIS DEPARTMENT OF NATURAL RESOURCES (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mermet Dam built?
Mermet Dam was completed in 1950, making it 76 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 Mermet Dam?
Mermet 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 Mermet Dam?
Mermet Dam has a dam height of 10 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 Mermet Dam last inspected?
Mermet Dam was last inspected on June 14, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.