Westville Lake Dam
Westville Lake Dam is an earth dam located in Columbiana County, Ohio, built in 1912. It carries a Significant hazard potential classification and has a poor condition assessment.
About Westville Lake Dam
The primary purpose of Westville Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Alliance (local government). It impounds the Naylor Ditch near Alliance.
The dam stands 29 feet tall and stretches 600 feet across, creates a reservoir covering 77 acres, has a maximum storage capacity of 1,039 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1912, the structure is over a century 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. An emergency action plan is in place for this dam. The most recent inspection on record was 11/17/2021.
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Location
| State | Ohio |
| County | Columbiana |
| Nearest City | Alliance |
| River/Stream | Naylor Ditch |
| Coordinates | 40.89111, -81.00556 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 600 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 1,039 acre-ft |
| Max Storage | 1,039 acre-ft |
| Normal Storage | 609 acre-ft |
| Surface Area | 77 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 3,296 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Alliance |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 11/17/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH00333 |
| Federal ID | OH00333 |
| More Info | State Dam Safety Program |