Montgomery Run Swm Pond 1 (montgomery Run Road) is an earth dam located in Howard County, Maryland, built in 1990. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 20 ft20 ft tall. 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 Montgomery Run Swm Pond 1 (montgomery Run Road)
The primary purpose of Montgomery Run Swm Pond 1 (montgomery Run Road) is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Howard County (local government). It impounds the Deep Run-tr near Jonestown, Howard County.
The dam stands 20 feet tall. Completed in 1990, the structure is 36 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 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 07/25/2024.
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Location
| State | Maryland |
| County | Howard |
| Nearest City | Jonestown, Howard County |
| River/Stream | Deep Run-tr |
| Coordinates | 39.21962, -76.80034 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Year Completed | 1990 (36 years old) |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Howard County |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 07/25/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MD00589 |
| Federal ID | MD00589 |
| More Info | State Dam Safety Program |