STATION.--01474000 WISSAHICKON CREEK AT MOUTH, PHILADELPHIA, PA
LOCATION.--Lat 40`00'55", long 75`12'26", Philadelphia County, Hydrologic Unit 02040203, on left bank 100 ft upstream from dam at Ridge Avenue, 750 ft upstream from mouth.
DRAINAGE AREA.--64.0 square miles.
PERIOD OF RECORD.--June 1897 to September 1903, January 1905 to July 1906, October 1965 to current year. Prior to October 1965, records furnished by Department of Public Works, City of Philadelphia. Records for 1971-74 published in WDR PA-81-1. Prior to October 1965, published as "near Philadelphia".
GAGE.--Water-stage recorder, water-quality monitor, concrete control, and crest-stage gage. Datum of gage is 25.27 ft above North American Vertical Datum of 1988 (from benchmark). Prior to October 1965, water-stage recorder at about same site and datum. Prior to September 23, 2024, the datum of gage was reported as 26.41 ft above National Geodetic Vertical Datum of 1929. Satellite telemetry at station.
COOPERATION.--Station established and maintained by the U.S. Geological Survey. Funding for the operation of this station is provided by the City of Philadelphia Water Department and the U.S. Geological Survey.
REMARKS.-- Calibration of water-quality instrumentation is conducted exclusively by Philadelphia Water Department personnel with USGS oversight. Erroneous or missing data, resulting from instrument malfunction, are not the responsibility of USGS. Possible pumping from quarry 6 miles upstream. Possible diversions for irrigation. The continuous water-quality monitor operated by the Philadelphia Water Department is located at Lat 40`01'21.5", Long 75`11`53.8", approximately 3,800 feet upstream of gage.
GAGE HEIGHTS OF IMPORTANCE.-
Supplied by USGS: Maximum recordable gage height (stage sensor operational limit) - 12.6 ft; Data transmitter operational limit - 13.3 ft;
Supplied by NWS: No flood stage has been determined for this station.