Old Mt. Olive City Lake Dam
Key Takeaway
Old Mt. Olive City Lake Dam is classified as significant hazard in Illinois. It was completed in 1900 and is 126 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 37 ft (taller than 79.6% in IL) |
| Dam Length | 380 ft |
| Dam Type | Earth |
| Max Storage | 539 acre-ft |
| Normal Storage | 411 acre-ft |
| Surface Area | 37 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,414 cfs |
| Year Completed | 1900 (126 years old) |
| NID ID | IL00766 |
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
CITY OF MOUNT OLIVE
Local Government
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Low Hazard 43 ftFrequently Asked Questions
What is the hazard classification of Old Mt. Olive City Lake Dam?
Old Mt. Olive City Lake 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 Old Mt. Olive City Lake Dam?
Old Mt. Olive City Lake Dam is owned by CITY OF MOUNT OLIVE (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Old Mt. Olive City Lake Dam built?
Old Mt. Olive City Lake Dam was completed in 1900, making it 126 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 Old Mt. Olive City Lake Dam?
Old Mt. Olive City Lake Dam serves the following purposes: Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Old Mt. Olive City Lake Dam?
Old Mt. Olive City Lake Dam has a dam height of 37 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 Old Mt. Olive City Lake Dam last inspected?
Old Mt. Olive City Lake Dam was last inspected on May 31, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.