USGS Water-Year Summary for Site 01475530

Click to hide Water-Year Summary instructions and information

Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
Not all sites have reports available for every water year.

	Available Parameters
	00010 Temperature, water(Min.,Mean,Max.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Min.,Max.,Mean)
	00300 Dissolved oxygen(Max.,Mean,Min.)
	00301 Diss oxygen,%saturtn(Min.,Max.,Mean)
	00400 pH(Med.,Min.,Max.)

Select a water year

Water year 2023: 2022-10-01 to 2023-09-30

Print this page

USGS Water-Year Summary 2023

01475530 COBBS CREEK AT U.S. HIGHWAY NO. 1 AT PHILADELPHIA, PA

LOCATION - Lat 39°58'29", long 75°16'49" referenced to North American Datum of 1927, Philadelphia County, PA, 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 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1964 to September 1981. Prior to October 1973 published as "near Philadelphia". September 2004 to current year.

GAGE - Water-stage recorder, crest-stage gage, and concrete control. Datum of gage is 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 City of Philadelphia, Water Department, and the U.S. Geological Survey.

REMARKS - Records for water year 2014 are fair except those for discharges greater than 120 ft³/s and those for estimated daily discharges, which are poor. Records for water year 2015 are fair except those for discharges greater than 120 ft³/s and those for estimated daily discharges, which are poor. Records for water year 2016 are fair, except for flows greater than 120 cfs, Aug 1-3, and estimated daily values, which are poor. Records for water year 2017 are fair, except for flows greater than 120 cfs and those estimated discharges, which are poor. Records for water year 2018 are fair, except for flows greater than 120 cfs and those estimated discharges, which are poor. Records for water year 2019 are fair, except for flows greater than 120 cfs. No estimated discharges during the 2019 water year.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum discharge 4,930 ft³/s, Aug 1, 2004, gage height 11.18 ft.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - October 2018 to current year. Seasonal.

INSTRUMENTATION - Water-quality monitor interfaced with a data collection platform collecting 15-minute readings of water temperature, specific conductance, pH, and dissolved oxygen.