Hillsboro Upground Reservoir
Hillsboro Upground Reservoir is an earth dam located in Highland County, Ohio, built in 1991. It carries a Significant hazard potential classification and has a poor condition assessment.
About Hillsboro Upground Reservoir
The primary purpose of Hillsboro Upground Reservoir is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Hillsboro (local government). It impounds the Unnamed Tributary To Clear Creek near Rocky Fork.
The dam stands 48 feet tall and stretches 4,100 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 592 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1991, the structure is 35 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/12/2023.
At 48 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Ohio |
| County | Highland |
| Nearest City | Rocky Fork |
| River/Stream | Unnamed Tributary To Clear Creek |
| Coordinates | 39.24028, -83.59500 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 48 ft |
| Dam Height | 48 ft |
| Dam Length | 4,100 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 592 acre-ft |
| Max Storage | 592 acre-ft |
| Normal Storage | 491 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 213 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Hillsboro |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/12/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OH02789 |
| Federal ID | OH02789 |
| More Info | State Dam Safety Program |