Crystal Lake Dam
New Hampshire, Belknap County, MASCOMA RIVER
Location
| State | New Hampshire |
| County | Belknap |
| River | MASCOMA RIVER |
| Coordinates | 43.42500, -71.30660 |
Physical Characteristics
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 575 ft |
| NID Storage | 18,300 acre-ft |
| Max Storage | 18,300 acre-ft |
| Surface Area | 1,155 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Poor |
| EAP Status | Yes |
| Last Inspection | September 24, 2025 |
| Inspection Frequency | 2 |
Dam Information
| Year Completed | 1881 |
| Primary Purpose | Recreation |
| Dam Type | Concrete |
| Owner Type | State |
| Owner | NH DES WATER DIVISION |
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.