Heritage Harbour (mastline Drive)
Heritage Harbour (mastline Drive) is an earth dam located in Anne Arundel County, Maryland, built in 1974. It carries a Low hazard potential classification and has a fair condition assessment.
About Heritage Harbour (mastline Drive)
The primary purpose of Heritage Harbour (mastline Drive) is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Heritage Harbour Comm Assoc (private). It impounds the South River-tr near Heritage Harbor.
The dam stands 34 feet tall and stretches 625 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 100 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1974, the structure is well into its service life at over 50 years 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 03/08/2024.
At 34 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Maryland |
| County | Anne Arundel |
| Nearest City | Heritage Harbor |
| River/Stream | South River-tr |
| Coordinates | 38.97663, -76.59414 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 625 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 46 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 300 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Heritage Harbour Comm Assoc |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 03/08/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MD00150 |
| Federal ID | MD00150 |
| More Info | State Dam Safety Program |