Greenfield City Dam
Key Takeaway
Greenfield City Dam is classified as significant hazard in Illinois. It was completed in 1959 and is 67 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 | 650 ft |
| Dam Type | Earth |
| Max Storage | 899 acre-ft |
| Normal Storage | 564 acre-ft |
| Surface Area | 52 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 984 cfs |
| Year Completed | 1959 (67 years old) |
| NID ID | IL00761 |
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 GREENFIELD
Local Government
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Low Hazard 27 ftFrequently Asked Questions
What is the hazard classification of Greenfield City Dam?
Greenfield City 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 Greenfield City Dam?
Greenfield City Dam is owned by CITY OF GREENFIELD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Greenfield City Dam built?
Greenfield City Dam was completed in 1959, making it 67 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 Greenfield City Dam?
Greenfield City 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 Greenfield City Dam?
Greenfield City 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 Greenfield City Dam last inspected?
Greenfield City Dam was last inspected on August 19, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.