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USGS 01460440 Delaware and Raritan Canal at Port Mercer NJ


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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°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.--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 3 Available Parameters for this site
00010 Temperature, water, Sidelooker 2016-06-25  2016-10-23
00060 Discharge 2007-10-01  2016-10-23
00065 Gage height, H350XL Bubbler 2012-08-01  2016-10-23

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Discharge, cubic feet per second

Most recent instantaneous value: 135   10-23-2016   03:30 EDT
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Daily discharge, cubic feet per second -- statistics for Oct 23 based on 27 years of record more
Mean Most Recent
Value Oct 23
Median 75th
8.0 123 131 135 139 145 165

Gage height, feet, H350XL Bubbler

Most recent instantaneous value: 54.37   10-23-2016   03:30 EDT
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