One Horse Gap
Key Takeaway
One Horse Gap is classified as significant hazard in Illinois. It was completed in 1973 and is 53 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 61.3% in IL) |
| Dam Length | 443 ft |
| Dam Type | Earth |
| Max Storage | 304 acre-ft |
| Normal Storage | 193 acre-ft |
| Surface Area | 29 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 262 cfs |
| Year Completed | 1973 (53 years old) |
| NID ID | IL50615 |
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
USDA FS
Federal Government
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What is the hazard classification of One Horse Gap?
One Horse Gap 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 One Horse Gap?
One Horse Gap is owned by USDA FS (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was One Horse Gap built?
One Horse Gap was completed in 1973, making it 53 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 One Horse Gap?
One Horse Gap serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is One Horse Gap?
One Horse Gap has a dam height of 30 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 One Horse Gap last inspected?
One Horse Gap was last inspected on August 1, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.