Dynegy/Havana Station/Cell 1, Polishing P
Key Takeaway
Dynegy/Havana Station/Cell 1, Polishing P is classified as high hazard in Illinois. It was completed in 1993 and is 33 years old. 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 | 26 ft (taller than 47.1% in IL) |
| Dam Length | 9,200 ft |
| Dam Type | Earth |
| Max Storage | 606 acre-ft |
| Normal Storage | 482 acre-ft |
| Year Completed | 1993 (33 years old) |
| NID ID | IL50185 |
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
Nearby Dams
Dynegy/Havana Sta/East Ash Pond System
Mason, IL
High Hazard 38 ftDynegy/Havana Sta/East Ash Pond Dam
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High Hazard 36 ftDynegy/Havana Sta/South Ash Pond Dam
Mason, IL
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
Schuyler, IL
Low Hazard 10 ftLake Irene Dam
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Low Hazard 33 ftFrequently Asked Questions
What is the hazard classification of Dynegy/Havana Station/Cell 1, Polishing P?
Dynegy/Havana Station/Cell 1, Polishing P 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 Station/Cell 1, Polishing P?
Dynegy/Havana Station/Cell 1, Polishing P is owned by DYNEGY MIDWEST GENERATION, INC. (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Dynegy/Havana Station/Cell 1, Polishing P built?
Dynegy/Havana Station/Cell 1, Polishing P was completed in 1993, making it 33 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 Dynegy/Havana Station/Cell 1, Polishing P?
Dynegy/Havana Station/Cell 1, Polishing P 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 Station/Cell 1, Polishing P?
Dynegy/Havana Station/Cell 1, Polishing P has a dam height of 26 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 Station/Cell 1, Polishing P last inspected?
Dynegy/Havana Station/Cell 1, Polishing P was last inspected on May 5, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.