Pinckneyville Reservoir Dam
Key Takeaway
Pinckneyville Reservoir Dam is classified as significant hazard in Illinois. It was completed in 1953 and is 73 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 45 ft (taller than 88% in IL) |
| Dam Length | 920 ft |
| Dam Type | Earth |
| Max Storage | 6.6K acre-ft |
| Normal Storage | 2.9K acre-ft |
| Surface Area | 202 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 6,371 cfs |
| Year Completed | 1953 (73 years old) |
| NID ID | IL00537 |
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 PINCKNEYVILLE
Local Government
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Significant Hazard 50 ftFrequently Asked Questions
What is the hazard classification of Pinckneyville Reservoir Dam?
Pinckneyville 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 Pinckneyville Reservoir Dam?
Pinckneyville Reservoir Dam is owned by CITY OF PINCKNEYVILLE (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pinckneyville Reservoir Dam built?
Pinckneyville Reservoir Dam was completed in 1953, making it 73 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 Pinckneyville Reservoir Dam?
Pinckneyville 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 Pinckneyville Reservoir Dam?
Pinckneyville Reservoir Dam has a dam height of 45 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 Pinckneyville Reservoir Dam last inspected?
Pinckneyville Reservoir Dam was last inspected on October 12, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.