Westford Depot Dam
Westford Depot Dam is a gravity dam located in Middlesex County, Massachusetts. It carries a Significant hazard potential classification and has a fair condition assessment.
About Westford Depot Dam
The primary purpose of Westford Depot Dam 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 Town Of Westford (local government). It impounds the Stony Brook near Westford.
The dam stands 12 feet tall and stretches 65 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 274 acre-feet, and collects water from a drainage area of 34 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 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 10/13/2021.
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Location
| State | Massachusetts |
| County | Middlesex |
| Nearest City | Westford |
| River/Stream | Stony Brook |
| Coordinates | 42.59704, -71.43495 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 12 ft |
| Dam Length | 65 ft |
Storage & Hydraulics
| NID Storage | 274 acre-ft |
| Max Storage | 274 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 34 sq mi |
| Max Discharge | 566 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Town of Westford |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 10/13/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00133 |
| Federal ID | MA00133 |
| More Info | State Dam Safety Program |