Grand Rapids
Key Takeaway
Grand Rapids is classified as high hazard in Michigan. It was completed in 1909 and is 117 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 | 24 ft (taller than 81.6% in MI) |
| Dam Length | 1,410 ft |
| Dam Type | Gravity |
| Max Storage | 2.2K acre-ft |
| Normal Storage | 2.1K acre-ft |
| Surface Area | 300 acres |
| Drainage Area | 3,720 sq mi |
| Max Discharge | 42,000 cfs |
| Year Completed | 1909 (117 years old) |
| NID ID | MI00022 |
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
Wisconsin Public Service Corporation
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Grand Rapids?
Grand Rapids 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 Grand Rapids?
Grand Rapids is owned by Wisconsin Public Service Corporation (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grand Rapids built?
Grand Rapids was completed in 1909, making it 117 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 Grand Rapids?
Grand Rapids 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 Grand Rapids?
Grand Rapids has a dam height of 24 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 Grand Rapids last inspected?
Grand Rapids was last inspected on September 8, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.