Willson Water Treatment Plant Levee
Willson Water Treatment Plant Levee is an earth dam located in Washington County, Maryland, built in 1927. It carries a Significant hazard potential classification and has a fair condition assessment.
About Willson Water Treatment Plant Levee
The primary purpose of Willson Water Treatment Plant Levee is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by City Of Hagerstown (local government). It impounds the Offstream-potomac River near Williamsport.
The dam stands 30 feet tall. Completed in 1927, the structure is well-established, with more than 75 years of service.
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 09/26/2024.
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Location
| State | Maryland |
| County | Washington |
| Nearest City | Williamsport |
| River/Stream | Offstream-potomac River |
| Coordinates | 39.61006, -77.84750 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Year Completed | 1927 (99 years old) |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | City of Hagerstown |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 09/26/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MD00479 |
| Federal ID | MD00479 |
| More Info | State Dam Safety Program |