Lexington Reservoir Dam is an earth dam located in Middlesex County, Massachusetts. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 625 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 Lexington Reservoir Dam
The primary purpose of Lexington Reservoir Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town of Lexington (local government). It impounds the Tributary of Aberjona River near Lexington.
The dam stands 10 feet tall and stretches 625 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 62 acre-feet, and collects water from a drainage area of 0 square miles.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 03/19/2024.
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Location
| State | Massachusetts |
| County | Middlesex |
| Nearest City | Lexington |
| River/Stream | Tributary of Aberjona River |
| Coordinates | 42.43697, -71.24704 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Length | 625 ft |
Storage & Hydraulics
| NID Storage | 62 acre-ft |
| Max Storage | 62 acre-ft |
| Normal Storage | 31 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Town of Lexington |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/19/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA01126 |
| Federal ID | MA01126 |
| More Info | State Dam Safety Program |