Lost Lake Dam
Massachusetts — Middlesex County — Martin's Pond Brook
Location
| State | Massachusetts |
| County | Middlesex |
| River | Martin's Pond Brook |
| Coordinates | 42.60070, -71.51825 |
Physical Characteristics
| NID Height | 10 ft |
| Dam Height | — |
| Dam Length | 100 ft |
| NID Storage | 1,960 acre-ft |
| Max Storage | 1,960 acre-ft |
| Surface Area | 300 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | May 5, 2023 |
| Inspection Frequency | 2 |
Dam Information
| Year Completed | 1910 |
| Primary Purpose | Recreation |
| Dam Type | Concrete |
| Owner Type | Local Government |
| Owner | Town of Groton |
| Other Name | Knopp'S 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.