Blanchester Reservoir No. 5 Dam
Blanchester Reservoir No. 5 Dam is an earth dam located in Clinton County, Ohio, built in 1970. It carries a Significant hazard potential classification and has a fair condition assessment.
About Blanchester Reservoir No. 5 Dam
The primary purpose of Blanchester Reservoir No. 5 Dam 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 Village Of Blanchester (local government). It impounds the Offstream near Blanchester.
The dam stands 14 feet tall and stretches 4,574 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 227 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, the structure is well into its service life at over 50 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 06/25/2024.
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Location
| State | Ohio |
| County | Clinton |
| Nearest City | Blanchester |
| River/Stream | Offstream |
| Coordinates | 39.28944, -83.97667 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 4,574 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 227 acre-ft |
| Max Storage | 227 acre-ft |
| Normal Storage | 154 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Village of Blanchester |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 06/25/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OH00968 |
| Federal ID | OH00968 |
| More Info | State Dam Safety Program |