Lake Seneca Dam
Key Takeaway
Lake Seneca Dam is classified as high hazard in Ohio. It was completed in 1966 and is 60 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 | 36 ft (taller than 76% in OH) |
| Dam Length | 990 ft |
| Dam Type | Earth |
| Max Storage | 8.1K acre-ft |
| Normal Storage | 1.6K acre-ft |
| Surface Area | 233 acres |
| Drainage Area | 103 sq mi |
| Max Discharge | 92,355 cfs |
| Year Completed | 1966 (60 years old) |
| NID ID | OH00382 |
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
Lake Seneca Property Owners Assn.
Private
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Significant Hazard 11 ftFrequently Asked Questions
What is the hazard classification of Lake Seneca Dam?
Lake Seneca 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 Lake Seneca Dam?
Lake Seneca Dam is owned by Lake Seneca Property Owners Assn. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Seneca Dam built?
Lake Seneca Dam was completed in 1966, making it 60 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 Lake Seneca Dam?
Lake Seneca 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 Lake Seneca Dam?
Lake Seneca Dam has a dam height of 36 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 Lake Seneca Dam last inspected?
Lake Seneca Dam was last inspected on June 26, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.