STATION.--01475530 COBBS CR AT U.S. HIGHWAY 1 AT PHILADELPHIA, PA
LOCATION.--Lat 39`58'29", long 75`16'49", Philadelphia County, Hydrologic Unit 02040202, on left bank 30 ft downstream from bridge on U.S. Highway No. 1 and 50 ft upstream from unnamed tributary at west city limits of Philadelphia.
DRAINAGE AREA.--4.78 square miles.
PERIOD OF RECORD.--October 1964 to September 1981, September 2004 to current year.
GAGE.--Water-stage recorder, water-quality monitor, concrete control and crest-stage gage. Datum of gage is 120.8 ft. above North American Vertical Datum of 1988, from single-base GNSS static survey. Prior to June 24, 2024, the datum of gage was reported as 121.76 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 U.S. Geological Survey and the City of Philadelphia Water Department.
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.