Johnson
Key Takeaway
Johnson is classified as low hazard in Wisconsin. It was completed in 1978 and is 48 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 18 ft (taller than 55.3% in WI) |
| Dam Length | 800 ft |
| Dam Type | Earth |
| Max Storage | 150 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 100 cfs |
| Year Completed | 1978 (48 years old) |
| NID ID | WI00993 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
City of Augusta
Local Government
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Low Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Johnson?
Johnson is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Johnson?
Johnson is owned by City of Augusta (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnson built?
Johnson was completed in 1978, making it 48 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 Johnson?
Johnson serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Johnson?
Johnson has a dam height of 18 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 Johnson last inspected?
Johnson was last inspected on July 27, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.