Radigan

Upper Tamarack River· Douglas, Wisconsin· Built 1938· Gravity· 12 ft tall
High Hazard Recreation Local Government

Key Takeaway

Radigan is classified as high hazard in Wisconsin. It was completed in 1938 and is 88 years old. Its primary use is recreation. 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 12 ft (taller than 30.4% in WI)
Dam Length300 ft
Dam TypeGravity
Max Storage420 acre-ft
Normal Storage230 acre-ft
Surface Area150 acres
Drainage Area41 sq mi
Max Discharge3,595 cfs
Year Completed1938 (88 years old)
NID IDWI00257

Safety Information

High Hazard

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?

Emergency Action Plan: No
Last Inspection: November 16, 2021
State Regulated: Yes
Regulatory Agency: WIDNR

Ownership

Town Of Dairyland

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Radigan?

Radigan 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 Radigan?

Radigan is owned by Town Of Dairyland (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Radigan built?

Radigan was completed in 1938, making it 88 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 Radigan?

Radigan 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 Radigan?

Radigan 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 Radigan last inspected?

Radigan was last inspected on November 16, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.