Lefferts Grist Mill Dam
New York — Suffolk County — TR-HUNTINGTON HARBOR
Location
| State | New York |
| County | Suffolk |
| River | TR-HUNTINGTON HARBOR |
| Coordinates | 40.90000, -73.44500 |
Physical Characteristics
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 730 ft |
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Surface Area | 15 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Not Rated |
| EAP Status | Not Required |
| Last Inspection | May 5, 2009 |
| Inspection Frequency | — |
Dam Information
| Year Completed | 1800 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | NATURE CONSERVANCY INC |
| Other Name | Lefferts Grist Mill Pond |
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.