Blanchester Reservoir No. 3 Dam
Key Takeaway
Blanchester Reservoir No. 3 Dam is classified as high hazard in Ohio. It was completed in 1934 and is 92 years old. Its primary use is water supply. 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 | 15 ft (taller than 12.4% in OH) |
| Dam Length | 420 ft |
| Dam Type | Earth |
| Max Storage | 94 acre-ft |
| Normal Storage | 49 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 371 cfs |
| Year Completed | 1934 (92 years old) |
| NID ID | OH00967 |
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
Village of Blanchester
Local Government
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Significant Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Blanchester Reservoir No. 3 Dam?
Blanchester Reservoir No. 3 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 Blanchester Reservoir No. 3 Dam?
Blanchester Reservoir No. 3 Dam is owned by Village of Blanchester (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Blanchester Reservoir No. 3 Dam built?
Blanchester Reservoir No. 3 Dam was completed in 1934, making it 92 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 Blanchester Reservoir No. 3 Dam?
Blanchester Reservoir No. 3 Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Blanchester Reservoir No. 3 Dam?
Blanchester Reservoir No. 3 Dam has a dam height of 15 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 Blanchester Reservoir No. 3 Dam last inspected?
Blanchester Reservoir No. 3 Dam was last inspected on April 25, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.