Island Lake 22b
Key Takeaway
Island Lake 22b is classified as low hazard in Minnesota. It was completed in 1999 and is 27 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 33 ft (taller than 87.8% in MN) |
| Dam Length | 730 ft |
| Max Storage | 530 acre-ft |
| Normal Storage | 12 acre-ft |
| Drainage Area | 21 sq mi |
| Year Completed | 1999 (27 years old) |
| NID ID | MN01731 |
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
County of Lyon
Local Government
Nearby Dams
Island Lake 13
Lyon, MN
Low Hazard 31 ftIsland Lake 4
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Low Hazard 41 ftLynd 30
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Low Hazard 18 ftNordland 35
Lyon, MN
Low Hazard 18 ftSonstegard-Telste
Lyon, MN
Significant Hazard 42 ftLynd 8
Lyon, MN
Low Hazard 27 ftCoon Creek
Lyon, MN
Low Hazard 8 ftRunholt-Mellenthin
Lyon, MN
Low Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Island Lake 22b?
Island Lake 22b 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 Island Lake 22b?
Island Lake 22b is owned by County of Lyon (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Island Lake 22b built?
Island Lake 22b was completed in 1999, making it 27 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 Island Lake 22b?
Island Lake 22b serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Island Lake 22b?
Island Lake 22b has a dam height of 33 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 Island Lake 22b last inspected?
Island Lake 22b was last inspected on September 9, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.