Wye Mills Dam
Wye Mills Dam is an earth dam located in Queen Anne's County, Maryland, built in 1682. It carries a Significant hazard potential classification and has a fair condition assessment.
About Wye Mills Dam
The primary purpose of Wye Mills Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Md Dnr-public Lands, Engineering & Constr-eastern (state). It impounds the Wye East River near Wye Mills.
The dam stands 20 feet tall and stretches 832 feet across, creates a reservoir covering 61 acres, has a maximum storage capacity of 1,224 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 1682, the structure is one of the older dams in the region, with over a century and a half 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 12/23/2024.
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Location
| State | Maryland |
| County | Queen Anne's |
| Nearest City | Wye Mills |
| River/Stream | Wye East River |
| Coordinates | 38.94250, -76.08050 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 832 ft |
| Year Completed | 1682 (344 years old) |
Storage & Hydraulics
| NID Storage | 1,224 acre-ft |
| Max Storage | 1,224 acre-ft |
| Normal Storage | 302 acre-ft |
| Surface Area | 61 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 4,930 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MD DNR-Public Lands, Engineering & Constr-Eastern |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 12/23/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MD00029 |
| Federal ID | MD00029 |
| More Info | State Dam Safety Program |