Allegan
Key Takeaway
Allegan is classified as low hazard in Michigan. It was completed in 1936 and is 90 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 30 ft (taller than 89.2% in MI) |
| Dam Length | 1,335 ft |
| Dam Type | Gravity |
| Max Storage | 20.6K acre-ft |
| Normal Storage | 17.2K acre-ft |
| Surface Area | 1,600 acres |
| Drainage Area | 1,550 sq mi |
| Max Discharge | 19,200 cfs |
| Year Completed | 1936 (90 years old) |
| NID ID | MI00151 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
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 25 ftFrequently Asked Questions
What is the hazard classification of Allegan?
Allegan is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Allegan?
Allegan is owned by Consumers Energy Company (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Allegan built?
Allegan was completed in 1936, making it 90 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 Allegan?
Allegan 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 Allegan?
Allegan has a dam height of 30 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 Allegan last inspected?
Allegan was last inspected on September 18, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.