Lake Hopatcong Dam
New Jersey — Morris County — Musconetcong River
Location
| State | New Jersey |
| County | Morris |
| River | Musconetcong River |
| Coordinates | 40.91767, -74.66418 |
Physical Characteristics
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 271 ft |
| NID Storage | 48,209 acre-ft |
| Max Storage | — |
| Surface Area | 2,474 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Poor |
| EAP Status | Yes |
| Last Inspection | August 28, 2024 |
| Inspection Frequency | 2 |
Dam Information
| Year Completed | 1925 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Concrete |
| Owner Type | State |
| Owner | Division of Parks and Forestry |
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.