Coffeen Gmf Gypsum Stack Dam
Key Takeaway
Coffeen Gmf Gypsum Stack Dam is classified as high hazard in Illinois. Its primary use is debris control. 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 | 108 ft (taller than 99.4% in IL) |
| Dam Length | 5,100 ft |
| Dam Type | Earth |
| Max Storage | 2.4K acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 39 acres |
| Drainage Area | 39 sq mi |
| Max Discharge | 1,100 cfs |
| NID ID | IL50579 |
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
DYNEGY MIDWEST GENERATION, INC.
Public Utility
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What is the hazard classification of Coffeen Gmf Gypsum Stack Dam?
Coffeen Gmf Gypsum Stack 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 Coffeen Gmf Gypsum Stack Dam?
Coffeen Gmf Gypsum Stack Dam is owned by DYNEGY MIDWEST GENERATION, INC. (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
What is the primary purpose of Coffeen Gmf Gypsum Stack Dam?
Coffeen Gmf Gypsum Stack Dam serves the following purposes: Debris Control. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Coffeen Gmf Gypsum Stack Dam?
Coffeen Gmf Gypsum Stack Dam has a dam height of 108 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 Coffeen Gmf Gypsum Stack Dam last inspected?
Coffeen Gmf Gypsum Stack Dam was last inspected on November 16, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.