Little Cache Structure 8 Dam
Key Takeaway
Little Cache Structure 8 Dam is classified as significant hazard in Illinois. It was completed in 1970 and is 56 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 21 ft (taller than 32.8% in IL) |
| Dam Length | 820 ft |
| Dam Type | Earth |
| Max Storage | 242 acre-ft |
| Normal Storage | 56 acre-ft |
| Max Discharge | 1,692 cfs |
| Year Completed | 1970 (56 years old) |
| NID ID | IL00042 |
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
VIENNA DRAINAGE DISTRICT
Local Government
Nearby Dams
Autumn Rose Lake Dam
Johnson, IL
Significant Hazard 32 ftLittle Cache Structure 10 Dam
Johnson, IL
Low Hazard 36 ftLittle Cache Structure 5 Dam
Johnson, IL
Low Hazard 31 ftLittle Cache Creek No. 1
Johnson, IL
Significant Hazard 48 ftVienna Reservoir Dam
Johnson, IL
Low Hazard 13 ftFetter Lake Dam
Johnson, IL
Low Hazard 24 ftCedar Lake Dam
Johnson, IL
Significant Hazard 24 ftTall Tree Lake Dam
Johnson, IL
Low Hazard 29 ftFrequently Asked Questions
What is the hazard classification of Little Cache Structure 8 Dam?
Little Cache Structure 8 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 Little Cache Structure 8 Dam?
Little Cache Structure 8 Dam is owned by VIENNA DRAINAGE DISTRICT (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Little Cache Structure 8 Dam built?
Little Cache Structure 8 Dam was completed in 1970, making it 56 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 Little Cache Structure 8 Dam?
Little Cache Structure 8 Dam serves the following purposes: Flood Risk Reduction, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Little Cache Structure 8 Dam?
Little Cache Structure 8 Dam has a dam height of 21 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 Little Cache Structure 8 Dam last inspected?
Little Cache Structure 8 Dam was last inspected on December 17, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.