Grafton
Key Takeaway
Grafton is classified as significant hazard in Wisconsin. It was completed in 1918 and is 108 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 20 ft (taller than 60.1% in WI) |
| Dam Length | 206 ft |
| Dam Type | Buttress |
| Max Storage | 400 acre-ft |
| Normal Storage | 260 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 451 sq mi |
| Max Discharge | 15,420 cfs |
| Year Completed | 1918 (108 years old) |
| NID ID | WI00171 |
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
Village Of Grafton
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Grafton?
Grafton 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 Grafton?
Grafton is owned by Village Of Grafton (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grafton built?
Grafton was completed in 1918, making it 108 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 Grafton?
Grafton serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Grafton?
Grafton has a dam height of 20 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 Grafton last inspected?
Grafton was last inspected on June 16, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.