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.
Funding for this site is provided by:
SURFACE-WATER RECORDS
LOCATION.--Lat 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.
DRAINAGE AREA.--17 mi².
PERIOD OF RECORD.--Continuous-record discharge station, October
1963 to current year.
REVISIONS HISTORY.--WDR NJ-1969: 1967(M). WDR NJ-82-2: Drainage
area. WDR NJ-04-1: 1971(M).
GAGE.--Water-stage recorder with telemetry above concrete dam.
Datum of gage is 7.62 ft above NAVD of 1988.
REMARKS.--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 ft³/s,
Jul 13, 2004, gage height, 6.27 ft; minimum discharge, 0.80 ft³/s, Nov
13, 1972, regulation from unknown source.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 1968-79, 1991 to current
year.
PERIOD OF DAILY RECORD.--SUSPENDED-SEDIMENT DISCHARGE: March
1968 to September 1969. WATER TEMPERATURE: March 1968 to August 1969,
recorded once daily; October 1998 to September 2001, recorded
hourly.
REMARKS.--Discrete water-quality data were collected as part of
the
New Jersey Ambient Surface-Water-Quality Monitoring Network.
Peak
Flood Chart

National Weather Service flood stage for
this gage is 4.5 ft.