Lefferts Grist Mill Dam
Low HazardNot Rated ConditionEmergency Action Plan: Not Required
Location
| County | Suffolk |
| Nearest City | None |
| River/Stream | TR-HUNTINGTON HARBOR |
| Coordinates | 40.90000, -73.44500 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 730 ft |
| Year Completed | 1800 (226 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 27 acre-ft |
| Surface Area | 15 acres |
| Max Discharge | 360 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | NATURE CONSERVANCY INC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 05/05/2009 |
| Emergency Action Plan | Not Required |