Wilmington Upground Reservoir No. 1
Key Takeaway
Wilmington Upground Reservoir No. 1 is classified as high hazard in Ohio. It was completed in 1945 and is 81 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 | 19 ft (taller than 24.6% in OH) |
| Dam Length | 3,570 ft |
| Dam Type | Earth |
| Max Storage | 371 acre-ft |
| Normal Storage | 307 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1945 (81 years old) |
| NID ID | OH00764 |
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
City of Wilmington
Local Government
Nearby Dams
Burtonville Lake Dam
Clinton, OH
Significant Hazard 25 ftWilmington Upground Reservoir No. 2
Clinton, OH
High Hazard 31 ftClinton County Tributary No. 1 Dam
Clinton, OH
High Hazard 15 ftClinton County Tributary No. 4 Dam
Clinton, OH
High Hazard 20 ftRoberts Lake Dam
Clinton, OH
Significant Hazard 19 ftEllis Lake Dam
Clinton, OH
Low Hazard 31 ftStokes Lake Dam
Clinton, OH
Low Hazard 17 ftCowan Lake Dam
Clinton, OH
High Hazard 63 ftFrequently Asked Questions
What is the hazard classification of Wilmington Upground Reservoir No. 1?
Wilmington Upground Reservoir No. 1 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 Wilmington Upground Reservoir No. 1?
Wilmington Upground Reservoir No. 1 is owned by City of Wilmington (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Wilmington Upground Reservoir No. 1 built?
Wilmington Upground Reservoir No. 1 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 Wilmington Upground Reservoir No. 1?
Wilmington Upground Reservoir No. 1 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 Wilmington Upground Reservoir No. 1?
Wilmington Upground Reservoir No. 1 has a dam height of 19 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 Wilmington Upground Reservoir No. 1 last inspected?
Wilmington Upground Reservoir No. 1 was last inspected on May 30, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.