Upper Massapequa Lake Dam
New York — Nassau County — MASSAPEQUA BROOK
Location
| State | New York |
| County | Nassau |
| River | MASSAPEQUA BROOK |
| Coordinates | 40.67750, -73.46361 |
Physical Characteristics
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 200 ft |
| NID Storage | 128 acre-ft |
| Max Storage | 128 acre-ft |
| Surface Area | 17 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Poor |
| EAP Status | Yes |
| Last Inspection | November 22, 2024 |
| Inspection Frequency | 2 |
Dam Information
| Year Completed | 1900 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Local Government |
| Owner | NASSAU COUNTY DEPARTMENT OF PUBLIC WORKS |
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.