Prairie Grass Boulevard Dam
Key Takeaway
Prairie Grass Boulevard Dam is classified as significant hazard in Illinois. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 6 ft (taller than 0.1% in IL) |
| Dam Length | 750 ft |
| Dam Type | Earth |
| Max Storage | 27 acre-ft |
| Normal Storage | 0 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 938 cfs |
| NID ID | IL55095 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
WHISPERING PRAIRIE INC.
Private
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What is the hazard classification of Prairie Grass Boulevard Dam?
Prairie Grass Boulevard Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Prairie Grass Boulevard Dam?
Prairie Grass Boulevard Dam is owned by WHISPERING PRAIRIE INC. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
What is the primary purpose of Prairie Grass Boulevard Dam?
Prairie Grass Boulevard 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 Prairie Grass Boulevard Dam?
Prairie Grass Boulevard Dam has a dam height of 6 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 Prairie Grass Boulevard Dam last inspected?
Prairie Grass Boulevard Dam was last inspected on November 19, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.