Upper Flowage
Key Takeaway
Upper Flowage is classified as low hazard in Wisconsin. It was completed in 1915 and is 111 years old. Its primary use is recreation.
Physical Details
| Dam Height | 12 ft (taller than 30.4% in WI) |
| Dam Length | 100 ft |
| Dam Type | Gravity |
| Max Storage | 70 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 245 cfs |
| Year Completed | 1915 (111 years old) |
| NID ID | WI00663 |
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
Cargill, Austen
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Upper Flowage?
Upper 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 Flowage?
Upper Flowage is owned by Cargill, Austen (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Flowage built?
Upper Flowage was completed in 1915, making it 111 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 Upper Flowage?
Upper Flowage 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 Upper Flowage?
Upper 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 Flowage last inspected?
Upper Flowage was last inspected on June 23, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.