Island Lake Dam
Key Takeaway
Island Lake Dam is classified as low hazard in Illinois. It was completed in 1940 and is 86 years old. Its primary use is recreation.
Physical Details
| Dam Height | 12 ft (taller than 10% in IL) |
| Dam Length | 160 ft |
| Dam Type | Earth |
| Max Storage | 470 acre-ft |
| Normal Storage | 373 acre-ft |
| Year Completed | 1940 (86 years old) |
| NID ID | IL00580 |
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
VILLAGE OF ISLAND LAKE
Local Government
Nearby Dams
Slocum Lake Dam
Lake, IL
Low Hazard 8 ftYellow Head Marsh Dam
McHenry, IL
Low Hazard 7 ftLakeland Estates Dam
Lake, IL
Low Hazard 9 ftBlack Tern Marsh Dam
McHenry, IL
Low Hazard 7 ftSilver Lake Dam
McHenry, IL
Low Hazard 23 ftStratton Lock and Dam
McHenry, IL
Significant Hazard 7 ftPond 2a Dam
Lake, IL
Low Hazard 8 ftTower Lake Dam
Lake, IL
Low Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Island Lake Dam?
Island Lake Dam 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 Dam?
Island Lake Dam is owned by VILLAGE OF ISLAND LAKE (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Island Lake Dam built?
Island Lake Dam was completed in 1940, making it 86 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 Dam?
Island Lake Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Island Lake Dam?
Island Lake Dam has a dam height of 12 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 Dam last inspected?
Island Lake Dam was last inspected on May 25, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.