Riverdale
Key Takeaway
Riverdale is classified as high hazard in Wisconsin. It was completed in 1905 and is 121 years old. Its primary use is hydroelectric. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 27 ft (taller than 75.9% in WI) |
| Dam Type | Gravity |
| Max Storage | 569 acre-ft |
| Normal Storage | 569 acre-ft |
| Surface Area | 86 acres |
| Drainage Area | 521 sq mi |
| Max Discharge | 3,300 cfs |
| Year Completed | 1905 (121 years old) |
| NID ID | WI00054 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Northern States Power Co
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Riverdale?
Riverdale is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Riverdale?
Riverdale is owned by Northern States Power Co (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Riverdale built?
Riverdale was completed in 1905, making it 121 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 Riverdale?
Riverdale serves the following purposes: Hydroelectric, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Riverdale?
Riverdale has a dam height of 27 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 Riverdale last inspected?
Riverdale was last inspected on May 25, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.