Alcona
Key Takeaway
Alcona is classified as high hazard in Michigan. It was completed in 1924 and is 102 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 | 60 ft (taller than 97.6% in MI) |
| Dam Length | 4,820 ft |
| Dam Type | Gravity |
| Max Storage | 25.0K acre-ft |
| Normal Storage | 25.0K acre-ft |
| Surface Area | 1,075 acres |
| Drainage Area | 1,594 sq mi |
| Max Discharge | 17,760 cfs |
| Year Completed | 1924 (102 years old) |
| NID ID | MI00150 |
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
Consumers Energy Company
Public Utility
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High Hazard 40 ftFrequently Asked Questions
What is the hazard classification of Alcona?
Alcona 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 Alcona?
Alcona is owned by Consumers Energy Company (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Alcona built?
Alcona was completed in 1924, making it 102 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 Alcona?
Alcona serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Alcona?
Alcona has a dam height of 60 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 Alcona last inspected?
Alcona was last inspected on September 13, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.