Rolling Green Community Pond is an earth dam located in Harford County, Maryland, built in 1965. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 22 ft22 ft tall and 200 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Rolling Green Community Pond
The primary purpose of Rolling Green Community Pond is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Rolling Green Community Association (private). It impounds the Cool Branch Run-tr near Allendale Estates.
The dam stands 22 feet tall and stretches 200 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 53 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1965, the structure is well into its service life at over 50 years 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 07/25/2024.
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Location
| State | Maryland |
| County | Harford |
| Nearest City | Allendale Estates |
| River/Stream | Cool Branch Run-tr |
| Coordinates | 39.57828, -76.24566 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 200 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 53 acre-ft |
| Max Storage | 53 acre-ft |
| Normal Storage | 29 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 950 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Rolling Green Community Association |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/25/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MD00387 |
| Federal ID | MD00387 |
| More Info | State Dam Safety Program |