Perrineville Dam dam
Perrineville Dam
Perrineville Dam, located in Millstone Township, New Jersey, serves as a vital recreational area along Rocky Brook, offering a serene escape for water resource and climate enthusiasts. The dam, primarily owned by the local government and regulated by the New Jersey Department of Environmental Protection, stands at a height of 17 feet and spans a length of 450 feet. With a storage capacity of 36 acre-feet and a surface area of 12 acres, the dam provides a picturesque backdrop for outdoor activities.
Despite its scenic beauty, Perrineville Dam poses a significant hazard potential due to its poor condition as assessed in March 2020. The dam is subject to regular inspections every two years to ensure public safety and mitigate risks associated with its deteriorating state. With its emergency action plan last revised in July 2021, efforts are being made to address the dam's deficiencies and enhance its resilience in the face of potential hazards.
As water resource management continues to be a pressing issue in the region, Perrineville Dam stands as a focal point for conservation efforts and risk mitigation strategies. With a heightened focus on dam safety and emergency preparedness, stakeholders are working towards safeguarding this essential water infrastructure while preserving its recreational value for generations to come.
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 Perrineville Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Crosswicks Creek At Extonville Nj | 32 cfs | → |
| Manalapan Brook At Spotswood Nj | 17 cfs | → |
| Assunpink Creek Near Clarksville Nj | 12 cfs | → |
| Big Brook Near Marlboro Nj | 4 cfs | → |
| Deep Run At Old Bridge Nj | 3 cfs | → |
| Delaware And Raritan Canal At Kingston Nj | 114 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Perrineville Dam.
Boat launches
- Middlesex County
- Roebling Park In Nj
- Trenton Public Boat Ramp
- Ravine Drive Matawan
- River Road Sayreville
- South 3rd Avenue Highland Park
Track Perrineville 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 Perrineville Dam
Where does the data for Perrineville 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 Significant 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 Perrineville Dam.