Coffeen Southwest Detention Pond Dam
Key Takeaway
Coffeen Southwest Detention Pond Dam is classified as low hazard in Illinois. It was completed in 2010 and is 16 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 23 ft (taller than 37.7% in IL) |
| Dam Length | 350 ft |
| Dam Type | Earth |
| Max Storage | 87 acre-ft |
| Normal Storage | 43 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 85 cfs |
| Year Completed | 2010 (16 years old) |
| NID ID | IL50582 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
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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Significant Hazard 30 ftFrequently Asked Questions
What is the hazard classification of Coffeen Southwest Detention Pond Dam?
Coffeen Southwest Detention Pond Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Coffeen Southwest Detention Pond Dam?
Coffeen Southwest Detention Pond Dam is owned by DYNEGY MIDWEST GENERATION, INC. (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Coffeen Southwest Detention Pond Dam built?
Coffeen Southwest Detention Pond Dam was completed in 2010, making it 16 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 Coffeen Southwest Detention Pond Dam?
Coffeen Southwest Detention Pond Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Coffeen Southwest Detention Pond Dam?
Coffeen Southwest Detention Pond Dam has a dam height of 23 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 Southwest Detention Pond Dam last inspected?
Coffeen Southwest Detention Pond Dam was last inspected on May 3, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.