Allen No. 1 Dam
Key Takeaway
Allen No. 1 Dam is classified as high hazard in Ohio. It was completed in 1981 and is 45 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 | 59 ft (taller than 95.6% in OH) |
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 54 acre-ft |
| Normal Storage | 43 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 214 cfs |
| Year Completed | 1981 (45 years old) |
| NID ID | OH02243 |
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
Gary and Deborah Allen and Lila J. Allen Trust
Private
Nearby Dams
Allen No. 2 Dam (Racetrack Dam)
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High Hazard 19 ftDeerfoot Lake Dam
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Significant Hazard 28 ftSunnyhill Freshwater Reservoir Dam
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Significant Hazard 45 ftSan Toy Dam
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High Hazard 21 ftNew Lexington Reservoir Dam
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High Hazard 45 ftFrequently Asked Questions
What is the hazard classification of Allen No. 1 Dam?
Allen No. 1 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 Allen No. 1 Dam?
Allen No. 1 Dam is owned by Gary and Deborah Allen and Lila J. Allen Trust (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Allen No. 1 Dam built?
Allen No. 1 Dam was completed in 1981, making it 45 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 Allen No. 1 Dam?
Allen No. 1 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 Allen No. 1 Dam?
Allen No. 1 Dam has a dam height of 59 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 Allen No. 1 Dam last inspected?
Allen No. 1 Dam was last inspected on September 27, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.