Glen Elyn Lower Dam (forest Glen Drive) is an earth dam located in Harford County, Maryland, built in 1975. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 22 ft22 ft tall and 550 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 Glen Elyn Lower Dam (forest Glen Drive)
The primary purpose of Glen Elyn Lower Dam (forest Glen Drive) is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Glen Elyn Homeowners Association (local government). It impounds the Little Gunpower Falls-tr near Moores Road Area.
The dam stands 22 feet tall and stretches 550 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 21 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1975, 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 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 09/16/2022.
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Location
| State | Maryland |
| County | Harford |
| Nearest City | Moores Road Area |
| River/Stream | Little Gunpower Falls-tr |
| Coordinates | 39.53980, -76.50730 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 550 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 21 acre-ft |
| Max Storage | 21 acre-ft |
| Normal Storage | 8 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 170 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Glen Elyn Homeowners Association |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 09/16/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MD00449 |
| Federal ID | MD00449 |
| More Info | State Dam Safety Program |