Assunpink #21 Dam dam
Assunpink #21 Dam
Assunpink #21 Dam, located in Mercer County, New Jersey, is a crucial structure owned by the local government and regulated by the New Jersey Department of Environmental Protection. The dam, situated on the Assunpink Creek, serves primarily for flood risk reduction, with a height of 24.6 feet and a storage capacity of 80 acre-feet. With a hazard potential rated as high, the dam's condition assessment in May 2021 was deemed satisfactory, reflecting its ongoing maintenance and effectiveness in mitigating flooding risks in the area.
Managed and funded by the Natural Resources Conservation Service, Assunpink #21 Dam plays a vital role in protecting the surrounding community from potential water-related disasters. The dam's association with flood risk reduction underscores its importance in safeguarding the region and its residents from the impact of extreme weather events, especially in a time of increasing climate variability and heightened concerns about water resource management. With regular inspections and a history of satisfactory condition assessments, the dam stands as a critical infrastructure for water resource and climate enthusiasts to monitor and appreciate for its essential role in maintaining the local environment's resilience.
As a significant structure in the region, Assunpink #21 Dam's presence on the Assunpink Creek contributes to the overall water management system in Mercer County. Its strategic location and function in flood risk reduction highlight the intersection of water resource management and climate resilience, emphasizing the importance of sustainable infrastructure development to address the challenges posed by a changing climate. As enthusiasts in this field, understanding the role and significance of dams like Assunpink #21 is crucial for promoting effective water resource management practices and building a more resilient future in the face of climate change impacts.
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 Assunpink #21 Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Assunpink Creek Near Clarksville Nj | 12 cfs | → |
| Delaware And Raritan Canal At Port Mercer Nj | 142 cfs | → |
| Assunpink Creek At Trenton Nj | 30 cfs | → |
| Stony Brook At Princeton Nj | 7 cfs | → |
| Delaware River At Trenton Nj | 5,610 cfs | → |
| Crosswicks Creek At Extonville Nj | 32 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Assunpink #21 Dam.
Boat launches
- Roebling Park In Nj
- Trenton Public Boat Ramp
- Morrisville
- Yardley
- Levittown Lake
- Firemens Eddy/Belle Mountain
Track Assunpink #21 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 Assunpink #21 Dam
Where does the data for Assunpink #21 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 High 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 Assunpink #21 Dam.