Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins
  • Data formats changed in August 2016, and additional water-data changes will be coming through 2017. Read more here
  • Full News RSS icon
Click to hide state-specific text


USGS 01464000 Assunpink Creek at Trenton NJ


Click to hidestation-specific text
During winter months, cold and ice may result in inaccurate real-time gage height and streamflow data. Adjustments or deletions of this data can only be done after detailed analysis.



LOCATION.--Lat 40°13'27", long 74°44'57" referenced to North American Datum of 1983, Trenton City, Mercer County, NJ, Hydrologic Unit 02040105, on left bank 20 ft upstream from bridge on Chambers Street (Lincoln Avenue) in Trenton, 0.8 mi downstream of Pond Run, and 1.5 mi upstream from mouth.
DRAINAGE AREA.--90.6 mi2.
PERIOD OF RECORD.--August 1923 to current year.
REVISED RECORDS.--WDR NJ-82-2: Drainage area.
GAGE.--Water-stage recorder with telemetry. Concrete control since July 10, 1932. Datum of gage is 24.76 ft above NGVD of 1929 (levels from New Jersey Geological Survey benchmark).
REMARKS.--Records fair, except for estimated discharges, which are poor. Records include water diverted from outside the basin since February 1954 for municipal supply that returns to Assunpink Creek through Ewing-Lawrence Sewerage Authority Treatment Plant, 2.4 mi above station. Some diversion for irrigation in headwaters area during summer months. Flow regulated by several flood-control reservoirs upstream from gage since the mid-1970s.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 5,820 ft3/s, Aug 28, 2011, gage height, 15.12 ft; minimum discharge, 1.0 ft3/s, Aug 21, 1931.

Peak Flood Chart

Gage Photo

National Weather Service flood stage for this gage is 8.5 ft.

Forecasts for this gage are issued by the National Weather Service routinely year-round.
Forecast information is available here.

This station managed by the New Jersey Water Science Center.

Available Parameters Available Period
All 2 Available Parameters for this site
00060 Discharge 2007-10-01  2016-10-27
00065 Gage height 2007-10-01  2016-10-27

Graph w/ stats
Graph w/o stats
Graph w/ (up to 3) parms
Days  (7)

  -- or --
Begin date

End date

Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second

Most recent instantaneous value: 27   10-27-2016   21:15 EDT
Graph of  Discharge, cubic feet per second

Add up to 2 more sites and replot for "Discharge, cubic feet per second"

 Add site numbers

Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert      

Daily discharge, cubic feet per second -- statistics for Oct 27 based on 92 years of record more
Most Recent
Value Oct 27
Median Mean 75th
20 27 42 64 89 100 610

Gage height, feet

Most recent instantaneous value: 2.46   10-27-2016   21:15 EDT
Graph of  Gage height, feet

Add up to 2 more sites and replot for "Gage height, feet"

 Add site numbers

Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert