Marion Reservoir Dam
Key Takeaway
Marion Reservoir Dam is classified as significant hazard in Illinois. It was completed in 1971 and is 55 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 25 ft (taller than 42.6% in IL) |
| Dam Length | 895 ft |
| Dam Type | Earth |
| Max Storage | 1.9K acre-ft |
| Normal Storage | 966 acre-ft |
| Drainage Area | 24 sq mi |
| Year Completed | 1971 (55 years old) |
| NID ID | IL00014 |
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 MARION
Local Government
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What is the hazard classification of Marion Reservoir Dam?
Marion Reservoir 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 Marion Reservoir Dam?
Marion Reservoir Dam is owned by CITY OF MARION (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Marion Reservoir Dam built?
Marion Reservoir Dam was completed in 1971, making it 55 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 Marion Reservoir Dam?
Marion Reservoir Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Marion Reservoir Dam?
Marion Reservoir Dam has a dam height of 25 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 Marion Reservoir Dam last inspected?
Marion Reservoir Dam was last inspected on June 28, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.