First Connecticut Lake Dam
New Hampshire — Coos County — CONNECTICUT RIVER
Location
| State | New Hampshire |
| County | Coos |
| River | CONNECTICUT RIVER |
| Coordinates | 45.08860, -71.28910 |
Physical Characteristics
| NID Height | 56 ft |
| Dam Height | 56 ft |
| Dam Length | 1,117 ft |
| NID Storage | 114,000 acre-ft |
| Max Storage | 114,000 acre-ft |
| Surface Area | 3,125 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Fair |
| EAP Status | Yes |
| Last Inspection | August 24, 2022 |
| Inspection Frequency | 2 |
Dam Information
| Year Completed | 1930 |
| Primary Purpose | Hydroelectric |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | GREAT RIVER HYDRO LLC |
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.