Townsend Harbor Dam
Massachusetts, Middlesex County, Squannacook River
Location
| State | Massachusetts |
| County | Middlesex |
| River | Squannacook River |
| Coordinates | 42.65254, -71.67265 |
Physical Characteristics
| NID Height | 11 ft |
| Dam Height | - |
| Dam Length | 250 ft |
| NID Storage | 273 acre-ft |
| Max Storage | 273 acre-ft |
| Surface Area | 40 acres |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Fair |
| EAP Status | Yes |
| Last Inspection | March 17, 2026 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1870 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | Hollingsworth and Vose Company |
| Other Name | Harbor Pond Dam |
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.