Greenfield Reservoir Dam
Key Takeaway
Greenfield Reservoir Dam is classified as high hazard in Iowa. It was completed in 1979 and is 47 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 42 ft (taller than 87.5% in IA) |
| Dam Length | 990 ft |
| Dam Type | Earth |
| Max Storage | 1.2K acre-ft |
| Normal Storage | 612 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1979 (47 years old) |
| Year Modified | 1990 |
| NID ID | IA02267 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Greenfield Municipal Utilities
Local Government
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What is the hazard classification of Greenfield Reservoir Dam?
Greenfield Reservoir Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Greenfield Reservoir Dam?
Greenfield Reservoir Dam is owned by Greenfield Municipal Utilities (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Greenfield Reservoir Dam built?
Greenfield Reservoir Dam was completed in 1979, making it 47 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 Reservoir Dam?
Greenfield Reservoir 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 Reservoir Dam?
Greenfield Reservoir Dam has a dam height of 42 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 Reservoir Dam last inspected?
Greenfield Reservoir Dam was last inspected on May 22, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.