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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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USGS Water-Year Summary 2025
01460440 DELAWARE AND RARITAN CANAL AT PORT MERCER, NJ
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.
SURFACE-WATER RECORDS
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 at NAVD 1988. Prior to April 15, 2019, published as gage height above NGVD 1929. To convert from NAVD 1988 to NGVD 1929 add 1.11 ft.
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 discharge: 1,030 ft³/s, Sept 2, 2021; maximum negative discharge: -1,830 ft³/s, Sept 2, 2021; maximum gage height: 62.70 ft, Sept 2, 2021.
