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:
39°54'11", long 75°01'17" referenced to North
American Datum of 1983, Cherry Hill Township, Camden County, NJ,
Hydrologic Unit 02040202, on right bank just upstream of dam on
Wallworth Lake in Pennypacker Park, 200 ft upstream from bridge on
State Highway 41 (Kings Highway) in Haddonfield, 0.6 mi upstream from
North Branch Cooper River, and 7.7 mi upstream from mouth.
PERIOD OF RECORD.--
October 1963 to current year.
WDR NJ-1969: 1967(M). WDR NJ-82-2: Drainage
area. WDR NJ-04-1: 1971(M).
Water-stage recorder with telemetry above concrete dam.
Datum of gage is 9.29 ft above NGVD of 1929.
Records fair, except for estimated discharges and
discharges below 20 ft3
/s, which are poor. Bypass gates were
installed on both sides of the dam in August 1987. Occasional
regulation at low flow from small lakes upstream. Small wastewater
treatment plants in the basin were regionalized after the summer of
1987, significantly reducing low flow.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 3,300
/s, Jul 13, 2004, gage height, 6.27 ft; minimum
discharge, 0.80 ft3
/s, Nov 13, 1972, regulation from unknown
PERIOD OF RECORD1.--
Water years 1968-79, 1991 to
PERIOD OF DAILY RECORD1.--
DISCHARGE: March 1968 to September 1969.
WATER TEMPERATURE: March 1968 to August 1969, recorded once daily;
October 1998 to September 2001, recorded hourly.
Discrete water-quality data were collected
as part of the
New Jersey Ambient Surface-Water-Quality Monitoring Network
1 Water-Quality Records
National Weather Service flood stage for
this gage is 2.8 ft.