Island Farm Weir Dam
Island Farm Weir Dam is a concrete dam located in Somerset County, New Jersey. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Island Farm Weir Dam
The primary purpose of Island Farm Weir Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by New Jersey Water Supply Authority (state). It impounds the Raritan River.
The dam stands 8 feet tall and stretches 200 feet across, creates a reservoir covering 60 acres, has a storage capacity of 110 acre-feet, and collects water from a drainage area of 785 square miles.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/16/2024.
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Location
| State | New Jersey |
| County | Somerset |
| River/Stream | Raritan River |
| Coordinates | 40.54283, -74.56612 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 200 ft |
Storage & Hydraulics
| NID Storage | 110 acre-ft |
| Normal Storage | 110 acre-ft |
| Surface Area | 60 acres |
| Drainage Area | 785 sq mi |
| Max Discharge | 47,000 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | New Jersey Water Supply Authority |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/16/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00930 |
| Federal ID | NJ00930 |
| More Info | State Dam Safety Program |