Graybrook Lake Dam
Key Takeaway
Graybrook Lake Dam is classified as high hazard in Indiana. It was completed in 1945 and is 81 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 | 23 ft (taller than 35.8% in IN) |
| Dam Length | 340 ft |
| Dam Type | Earth |
| Max Storage | 316 acre-ft |
| Normal Storage | 234 acre-ft |
| Surface Area | 32 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 531 cfs |
| Year Completed | 1945 (81 years old) |
| NID ID | IN00389 |
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
GRAYBROOK LAKE CONSERVANCY DISTRICT
Local Government
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Significant Hazard 22 ftFrequently Asked Questions
What is the hazard classification of Graybrook Lake Dam?
Graybrook 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 Graybrook Lake Dam?
Graybrook Lake Dam is owned by GRAYBROOK LAKE CONSERVANCY DISTRICT (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Graybrook Lake Dam built?
Graybrook Lake Dam was completed in 1945, making it 81 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 Graybrook Lake Dam?
Graybrook 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 Graybrook Lake Dam?
Graybrook Lake Dam has a dam height of 23 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 Graybrook Lake Dam last inspected?
Graybrook Lake Dam was last inspected on July 21, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.