Dynegy/Havana Sta/East Ash Pond Dam
Key Takeaway
Dynegy/Havana Sta/East Ash Pond 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 | 36 ft (taller than 78.2% in IL) |
| Dam Length | 7,574 ft |
| Dam Type | Earth |
| Max Storage | 1.4K acre-ft |
| Normal Storage | 613 acre-ft |
| Surface Area | 44 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 244 cfs |
| NID ID | IL50483 |
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, LLC
Public Utility
Nearby Dams
Dynegy/Havana Sta/East Ash Pond System
Mason, IL
High Hazard 38 ftDynegy/Havana Station/Cell 1, Polishing P
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High Hazard 26 ftDynegy/Havana Sta/South Ash Pond Dam
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Significant HazardQuiver Creek Weir Dam
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Low Hazard 15 ftLake Chautauqua Lower Dam
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Low Hazard 15 ftLake Chautauqua Upper Dam
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Low Hazard 17 ftCarlson Lake Water Control Dam
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Low Hazard 10 ftLake Irene Dam
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Low Hazard 33 ftFrequently Asked Questions
What is the hazard classification of Dynegy/Havana Sta/East Ash Pond Dam?
Dynegy/Havana Sta/East Ash Pond 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 Dynegy/Havana Sta/East Ash Pond Dam?
Dynegy/Havana Sta/East Ash Pond Dam is owned by DYNEGY MIDWEST GENERATION, LLC (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
What is the primary purpose of Dynegy/Havana Sta/East Ash Pond Dam?
Dynegy/Havana Sta/East Ash Pond 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 Dynegy/Havana Sta/East Ash Pond Dam?
Dynegy/Havana Sta/East Ash Pond Dam has a dam height of 36 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 Dynegy/Havana Sta/East Ash Pond Dam last inspected?
Dynegy/Havana Sta/East Ash Pond Dam was last inspected on November 10, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.