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
Funding for this site is provided by:
40°16'11", long 74°40'19" referenced to North
American Datum of 1983, Lawrence Township, Mercer County, NJ,
Hydrologic Unit 02040105, on left bank 250 ft upstream from bridge on
Quaker Bridge Road (County Route 533), 0.7 mi downstream from dam at
Lake Mercer, 1.9 mi south of Clarksville, 2.0 mi upstream from
Shipetaukin Creek, and 7.6 mi upstream from mouth.
PERIOD OF RECORD.--
Occasional low-flow measurements water years
1963-67. Continuous-record gaging station from October 1972 to
September 1981, and March 1992 to current year. Record published for
growing season only (April through October) for October 1995 to
Water-stage recorder with telemetry and crest-stage gage.
Datum of gage is 49.28 ft above NGVD of 1929.
Records fair, except for estimated discharges, which
are poor. Regulation from several flood-control dams since late 1970s
and ponds upstream. Diversions for irrigation upstream from
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 1,250
/s, Aug 29, 2011, gage height, 9.74 ft; minimum
discharge, 0.88 ft3
/s, Sep 11, 2010.
EXTREMES OUTSIDE PERIOD OF RECORD.--
Flood of Aug 28, 1971
reached a stage of 10.9 ft, discharge, 1,500 ft3