Annapolis Reservoir
Annapolis Reservoir is a buttress dam located in Anne Arundel County, Maryland, built in 1920. It carries a Significant hazard potential classification and has a fair condition assessment.
About Annapolis Reservoir
The primary purpose of Annapolis Reservoir is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Annapolis (local government). It impounds the Broad Creek-tr near South River Manor.
The dam stands 15 feet tall and stretches 345 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 82 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1920, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 05/03/2024.
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Location
| State | Maryland |
| County | Anne Arundel |
| Nearest City | South River Manor |
| River/Stream | Broad Creek-tr |
| Coordinates | 38.98800, -76.56780 |
Physical Characteristics
| Dam Type | Buttress |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 345 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 82 acre-ft |
| Max Storage | 82 acre-ft |
| Normal Storage | 70 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 430 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Annapolis |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/03/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MD00135 |
| Federal ID | MD00135 |
| More Info | State Dam Safety Program |