Island Farm Weir Dam dam
Island Farm Weir Dam
Island Farm Weir Dam, located in Bridgewater Township, New Jersey, serves as an essential water supply structure on the Raritan River. This concrete gravity dam stands at a height of 8 feet and spans 200 feet, providing a storage capacity of 110 acre-feet and covering a surface area of 60 acres. With a drainage area of 785 square miles and a maximum discharge of 47,000 cubic feet per second, the dam plays a crucial role in managing water resources in the region.
Owned and regulated by the state of New Jersey, Island Farm Weir Dam has been inspected regularly to ensure its satisfactory condition and low hazard potential. The dam's primary purpose is water supply, reflecting its importance in meeting the water needs of the surrounding communities. Despite its modest height and volume, the dam's strategic location and design contribute to its effectiveness in maintaining a reliable water source for both human consumption and environmental sustainability.
As a significant infrastructure on the Raritan River, Island Farm Weir Dam operates under the oversight of the New Jersey Department of Environmental Protection (NJDEP) and complies with state regulations for permitting, inspection, and enforcement. Its critical role in water management, combined with its satisfactory condition and low hazard potential, highlights the dam's importance in ensuring water security and resilience in the face of climate variability and changing hydrological conditions.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Island Farm Weir Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Raritan River Below Calco Dam At Bound Brook Nj | 136 cfs | → |
| Raritan River At Manville Nj | 228 cfs | → |
| Bound Bk At Middlesex Nj | 18 cfs | → |
| Millstone River At Blackwells Mills Nj | 110 cfs | → |
| West Branch Middle Brook Near Martinsville Nj | 0 cfs | → |
| North Branch Raritan River Near Raritan Nj | 97 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Island Farm Weir Dam.
Boat launches
- South Main Street Bound Brook
- South 3rd Avenue Highland Park
- Middlesex County
- River Road Sayreville
- Second Street Perth Amboy
- Raritan Reach Road 28, South Amboy
Track Island Farm Weir Dam in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Island Farm Weir Dam
Where does the data for Island Farm Weir Dam come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Low hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Island Farm Weir Dam.