Lost Lake Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Massachusetts |
| County | Middlesex |
| Nearest City | Groton |
| River/Stream | Martin's Pond Brook |
| Coordinates | 42.60070, -71.51825 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 10 ft |
| Dam Length | 100 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 1,960 acre-ft |
| Max Storage | 1,960 acre-ft |
| Normal Storage | 1,500 acre-ft |
| Surface Area | 300 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Town of Groton |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/05/2023 |
| Emergency Action Plan | Yes |