Mayfair Reservoir Dam
Key Takeaway
Mayfair Reservoir Dam is classified as low hazard in Illinois. It was completed in 1977 and is 49 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 9 ft (taller than 3.9% in IL) |
| Dam Length | 70 ft |
| Dam Type | Earth |
| Max Storage | 100 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 2 sq mi |
| Year Completed | 1977 (49 years old) |
| NID ID | IL55169 |
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
METROPOLITAN WATER RECLAMATION DISTRICT
Local Government
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Significant Hazard 25 ftBullfrog Lake Dam
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Low Hazard 7 ftFrequently Asked Questions
What is the hazard classification of Mayfair Reservoir Dam?
Mayfair Reservoir 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 Mayfair Reservoir Dam?
Mayfair Reservoir Dam is owned by METROPOLITAN WATER RECLAMATION DISTRICT (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mayfair Reservoir Dam built?
Mayfair Reservoir Dam was completed in 1977, making it 49 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 Mayfair Reservoir Dam?
Mayfair Reservoir Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mayfair Reservoir Dam?
Mayfair Reservoir Dam has a dam height of 9 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 Mayfair Reservoir Dam last inspected?
Mayfair Reservoir Dam was last inspected on June 24, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.