Chippewa Reservoir
Key Takeaway
Chippewa Reservoir is classified as high hazard in Wisconsin. It was completed in 1923 and is 103 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 | 45 ft (taller than 95.9% in WI) |
| Dam Length | 1,290 ft |
| Dam Type | Earth |
| Max Storage | 230.0K acre-ft |
| Normal Storage | 230.0K acre-ft |
| Surface Area | 15,800 acres |
| Drainage Area | 787 sq mi |
| Max Discharge | 40,000 cfs |
| Year Completed | 1923 (103 years old) |
| NID ID | WI00797 |
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
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Low Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Chippewa Reservoir?
Chippewa Reservoir 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 Chippewa Reservoir?
Chippewa Reservoir is owned by Northern States Power Co (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Chippewa Reservoir built?
Chippewa Reservoir was completed in 1923, making it 103 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 Chippewa Reservoir?
Chippewa Reservoir 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 Chippewa Reservoir?
Chippewa Reservoir has a dam height of 45 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 Chippewa Reservoir last inspected?
Chippewa Reservoir was last inspected on September 20, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.