Lake Williams Dam
Massachusetts, Middlesex County, Assabet River
Location
| State | Massachusetts |
| County | Middlesex |
| River | Assabet River |
| Coordinates | 42.33633, -71.57162 |
Physical Characteristics
| NID Height | 11 ft |
| Dam Height | - |
| Dam Length | 270 ft |
| NID Storage | 767 acre-ft |
| Max Storage | 767 acre-ft |
| Surface Area | 72 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Fair |
| EAP Status | Yes |
| Last Inspection | December 26, 2025 |
| Inspection Frequency | 2 |
Dam Information
| Year Completed | 1882 |
| Primary Purpose | - |
| Dam Type | Earth |
| Owner Type | Local Government |
| Owner | City of Marlborough |
| Other Name | N/A |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.