Johnston City Sewage Lagoon Dam
Key Takeaway
Johnston City Sewage Lagoon Dam is classified as significant hazard in Illinois. It was completed in 1963 and is 63 years old. Its primary use is other. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 12 ft (taller than 10% in IL) |
| Dam Length | 1,600 ft |
| Dam Type | Earth |
| Max Storage | 165 acre-ft |
| Normal Storage | 75 acre-ft |
| Year Completed | 1963 (63 years old) |
| NID ID | IL00103 |
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 JOHNSTON CITY
Local Government
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Significant Hazard 6 ftFrequently Asked Questions
What is the hazard classification of Johnston City Sewage Lagoon Dam?
Johnston City Sewage Lagoon 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 Johnston City Sewage Lagoon Dam?
Johnston City Sewage Lagoon Dam is owned by CITY OF JOHNSTON CITY (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnston City Sewage Lagoon Dam built?
Johnston City Sewage Lagoon Dam was completed in 1963, making it 63 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 Johnston City Sewage Lagoon Dam?
Johnston City Sewage Lagoon Dam serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Johnston City Sewage Lagoon Dam?
Johnston City Sewage Lagoon Dam has a dam height of 12 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 Johnston City Sewage Lagoon Dam last inspected?
Johnston City Sewage Lagoon Dam was last inspected on August 30, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.