Gateway Medical Lake Dam
Key Takeaway
Gateway Medical Lake Dam is classified as high hazard in Illinois. It was completed in 1939 and is 87 years old. Its primary use is recreation. 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 | 31 ft (taller than 66.2% in IL) |
| Dam Length | 230 ft |
| Dam Type | Earth |
| Max Storage | 27 acre-ft |
| Normal Storage | 17 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 468 cfs |
| Year Completed | 1939 (87 years old) |
| Year Modified | 2011 |
| NID ID | IL50619 |
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
GRANITE CITY HOSPITAL CO., LLC
Private
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High Hazard 45 ftFrequently Asked Questions
What is the hazard classification of Gateway Medical Lake Dam?
Gateway Medical Lake Dam 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 Gateway Medical Lake Dam?
Gateway Medical Lake Dam is owned by GRANITE CITY HOSPITAL CO., LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Gateway Medical Lake Dam built?
Gateway Medical Lake Dam was completed in 1939, making it 87 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 Gateway Medical Lake Dam?
Gateway Medical 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 Gateway Medical Lake Dam?
Gateway Medical Lake Dam has a dam height of 31 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 Gateway Medical Lake Dam last inspected?
Gateway Medical Lake Dam was last inspected on June 8, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.