Triangle Lake Dam
Key Takeaway
Triangle Lake Dam is classified as low hazard in Illinois. It was completed in 2000 and is 26 years old. Its primary use is fish and wildlife pond.
Physical Details
| Dam Height | 18 ft (taller than 24.2% in IL) |
| Dam Length | 8,500 ft |
| Dam Type | Earth |
| Max Storage | 2.8K acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 250 acres |
| Drainage Area | 17 sq mi |
| Year Completed | 2000 (26 years old) |
| NID ID | IL50412 |
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
ILLINOIS DEPARTMENT OF NATURAL RESOURCES
State Government
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Low Hazard 59 ftFrequently Asked Questions
What is the hazard classification of Triangle Lake Dam?
Triangle 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 Triangle Lake Dam?
Triangle Lake Dam is owned by ILLINOIS DEPARTMENT OF NATURAL RESOURCES (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Triangle Lake Dam built?
Triangle Lake Dam was completed in 2000, making it 26 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 Triangle Lake Dam?
Triangle Lake Dam serves the following purposes: Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Triangle Lake Dam?
Triangle Lake Dam has a dam height of 18 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 Triangle Lake Dam last inspected?
Triangle Lake Dam was last inspected on August 17, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.