Big Millpond Dam
Big Millpond Dam is an earth dam located in Worcester County, Maryland, built in 1900. It carries a Low hazard potential classification and has a fair condition assessment.
About Big Millpond Dam
The primary purpose of Big Millpond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Worcester County (local government). It impounds the Little Mill Run.
The dam stands 9 feet tall and stretches 375 feet across, creates a reservoir covering 60 acres, has a maximum storage capacity of 432 acre-feet, and collects water from a drainage area of 7 square miles. Completed in 1900, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected 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 10/26/2023.
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Location
| State | Maryland |
| County | Worcester |
| River/Stream | Little Mill Run |
| Coordinates | 38.01560, -75.45610 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 375 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 432 acre-ft |
| Max Storage | 432 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 60 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 502 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Worcester County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 10/26/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MD00080 |
| Federal ID | MD00080 |
| More Info | State Dam Safety Program |