Lake Ashburton Reservoir And Storage Tanks
Lake Ashburton Reservoir And Storage Tanks is an earth dam located in Baltimore City, Maryland, built in 1910. It carries a High hazard potential classification.
About Lake Ashburton Reservoir And Storage Tanks
The primary purpose of Lake Ashburton Reservoir And Storage Tanks is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Baltimore City Dpw Reservoir Section (local government). It impounds the Offstream-gwynns Run near Baltimore City.
The dam stands 40 feet tall and stretches 1,700 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 750 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1910, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 11/13/2024.
At 40 feet, this dam is taller than 87% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Maryland dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Maryland |
| County | Baltimore City |
| Nearest City | Baltimore City |
| River/Stream | Offstream-gwynns Run |
| Coordinates | 39.31916, -76.66876 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 1,700 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 750 acre-ft |
| Max Storage | 750 acre-ft |
| Normal Storage | 650 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Baltimore City DPW Reservoir Section |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Last Inspection | 11/13/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MD00108 |
| Federal ID | MD00108 |
| More Info | State Dam Safety Program |