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:
Lat 39°39'50.2", long 74°31'24.4"
referenced to North American Datum of 1983, Washington Township,
Burlington County, NJ, Hydrologic Unit 02040301, on upstream right bank
of main spillway at Harrisville Pond, 100 ft upstream from bridge on
County Route 679 in Harrisville, and 0.3 mi upstream from confluence
with West Branch Wading River.
PERIOD OF RECORD.--
Continuous-record discharge station, October
1930 to current year. Monthly discharge only for some periods,
published in WSP 1302. Prior to October 1955, published as "East
Branch Wading River at Harrisville".
WDR NJ-83-1: Drainage area. WDR US-2012:
Water-stage recorder with telemetry, crest-stage gage,
and concrete dam. Datum of gage is 4.62 ft above NGVD of 1929. Prior to
Oct 1, 2017, water-stage recorder and concrete weir at site 200 ft
downstream of main spillway dam at same datum.
Records good, except for estimated discharges, which
are fair. Figures given herein represent flow over main spillway and
through bypass channel located 700 ft upstream of main spillway. Flow
regulated by Harrisville Pond (capacity about 30,000,000 gal) and by
ponds and cranberry bogs 5 to 10 mi upstream. Flow probably reduced by
ground-water outflow to nearby surface drainage basins, such as Oyster
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 2,260
/s, Sep 5, 2012, gage height, 9.00 ft, from high-water
mark in gage house; maximum gage height, 9.54 ft, Aug 20, 1939, from
high-water mark in gage house; minimum discharge, 0.00
/s, Oct 26, 1932, while upstream pond was filling.
PERIOD OF RECORD.--
Water years 1925, 1959-71, 1974, 1976-96,
NOTICE: On October 1, 2017, the water
stage recorder was moved 200 ft upstream to the main spillway at
Harrisville Pond. The relationship between stage (gage-height) and
discharge has been adjusted to maintain a continuous record of
discharge although gage-heights reported after September 30, 2017, will
be noticeably higher for the same flow rate due to the relocation of
the recording equipment.