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

Page Loading - Please Wait...

Click to hideNews Bulletins
Click to hide state-specific text


* IMPORTANT: Next Generation Station Page

USGS 01460440 Delaware and Raritan Canal at Port Mercer NJ


Click to hidestation-specific text
Funding for this site is provided by:



LOCATION.--Lat 40°18'16", long 74°41'06" referenced to North American Datum of 1983, Lawrence Township, Mercer County, NJ, Hydrologic Unit 02040105, on right bank, 300 ft upstream from bridge on Province Line (Quaker Bridge) Road at Port Mercer, 2.2 mi east of Lawrenceville, and 3.5 mi southwest of Princeton.
PERIOD OF RECORD.--Continuous-record discharge station August 1990 to current year. Miscellaneous measurements made 1923, 1937-38, 1942-43, 1945, 1981, 1987-90.
GAGE.--Water-stage, velocity and water temperature recorder with telemetry. Datum of gage is NGVD of 1929.
REMARKS.--Records fair, except for estimated discharges and flows under 10 ft3/s, which are poor. The canal diverts water from the Delaware River at Raven Rock and discharges into Raritan River at New Brunswick. Reverse flow (denoted by a negative symbol) can occur during periods of heavy precipitation due to waste gate operation upstream and inflow into canal downstream from gage. Gage is located at the drainage divide between the Delaware and Raritan River Basins.
EXTREMES FOR PERIOD OF RECORD.--Maximum positive daily discharge, 222 ft3/s, Aug 22, 1990; maximum negative daily discharge, -637 ft3/s, Apr 16, 2007; maximum gage height, 62.66 ft, Aug 28, 2011.

Peak Flood Chart

Gage Photo

The water temperature data for this station are temporary and will only be displayed for 120 days. Although the instrumentation is calibrated at least once/year, the temporary classification means that documented routine inspections and other quality assurance measures are not performed that would make the data acceptable for archival, retrieval, or future use in general scientific or interpretive studies.

This station managed by the New Jersey Water Science Center.

Available Parameters Available Period
All 2 Available Parameters for this site
00060 Discharge 1989-10-23  2019-03-19
00065 Gage height 2007-10-01  2019-03-19

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: 148 03-19-2019   04:30 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 Mar 19 based on 27 years of record more
Mean Median 75th
Most Recent
Value Mar 19
48.0 122 129 137 145 148 155

Gage height, feet

Most recent instantaneous value: 55.11 03-19-2019   04:30 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