Chalk Hill
Key Takeaway
Chalk Hill is classified as high hazard in Michigan. It was completed in 1927 and is 99 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 | 41 ft (taller than 94.9% in MI) |
| Dam Length | 1,936 ft |
| Dam Type | Concrete |
| Max Storage | 8.1K acre-ft |
| Normal Storage | 8.1K acre-ft |
| Surface Area | 882 acres |
| Drainage Area | 3,220 sq mi |
| Max Discharge | 80,000 cfs |
| Year Completed | 1927 (99 years old) |
| NID ID | MI00160 |
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 Electric Power Company
Public Utility
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What is the hazard classification of Chalk Hill?
Chalk Hill 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 Chalk Hill?
Chalk Hill is owned by Wisconsin Electric Power Company (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Chalk Hill built?
Chalk Hill was completed in 1927, making it 99 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 Chalk Hill?
Chalk Hill 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 Chalk Hill?
Chalk Hill has a dam height of 41 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 Chalk Hill last inspected?
Chalk Hill was last inspected on June 14, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.