Upper Trappe River Flowage
Key Takeaway
Upper Trappe River Flowage is classified as low hazard in Wisconsin. It was completed in 1969 and is 57 years old.
Physical Details
| Dam Height | 12 ft (taller than 30.4% in WI) |
| Dam Length | 1,475 ft |
| Dam Type | Earth |
| Max Storage | 610 acre-ft |
| Normal Storage | 380 acre-ft |
| Surface Area | 41 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 118 cfs |
| Year Completed | 1969 (57 years old) |
| NID ID | WI00427 |
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
Wisconsin Department of Natural Resources
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Upper Trappe River Flowage?
Upper Trappe River Flowage 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 Upper Trappe River Flowage?
Upper Trappe River Flowage is owned by Wisconsin Department of Natural Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Trappe River Flowage built?
Upper Trappe River Flowage was completed in 1969, making it 57 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
How tall is Upper Trappe River Flowage?
Upper Trappe River Flowage 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 Upper Trappe River Flowage last inspected?
Upper Trappe River Flowage was last inspected on October 30, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.