USGS Water-Year Summary for Site 01473900

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	Available Parameters
	00010 Temperature, water(Mean,Max.,Min.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Mean,Min.,Max.)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Min.,Max.,Med.)
	63680 Turbidity, Form Neph(Max.,Mean,Min.)

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

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USGS Water-Year Summary 2023

01473900 WISSAHICKON CREEK AT FORT WASHINGTON, PA

LOCATION - Lat 40°07'26", long 75°13'13" referenced to North American Datum of 1927, Montgomery County, PA, Hydrologic Unit 02040203, on left bank at downstream side of bridge on State Highway 73, 0.5 mi downstream from Sandy Run, and 1 mi south of Fort Washington.

DRAINAGE AREA - 40.8 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 2000 to current year; September 1961 to March 1969; Annual maximums, October 1969 to September 1979, at site and datum then in use.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 139.98 ft above National Geodetic Vertical Datum of 1929. From Sept. 1961 to Mar. 1969 gage at present site at datum 140.70 ft above National Geodetic Vertical Datum of 1929. Satellite telemetry at station.

COOPERATION - Station established and maintained by the U.S. Geological Survey in cooperation with the Delaware River Basin Commission.

REMARKS - Records for water year 2014 are fair. Records for water years 2015-2019 are fair except estimated discharge, which is poor. Records for water year 2020 and 2023 are fair. Records for water years 2021-2022 are fair except estimated discharge, which is poor.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Sept. 16, 1999, reached a stage of 18.05 ft, from floodmarks, discharge about 14,300 ft³/s.

ECOLOGICAL RECORDS

PERIOD OF RECORD - April 2002 to current year.

REMARKS - Results of benthic surveys can be obtained by contacting the U.S. Geological Survey Pennsylvania Water Science Center, Exton Field Office.

WATER-QUALITY RECORDS

PERIOD OF RECORD - April 2002 to current year.

COOPERATION - Water-quality samples were collected as part of the Pennsylvania Department of Environmental Protection Water-Quality Network (WQN) with cooperation from the Pennsylvania Department of Environmental Protection.

REMARKS - As of October 2013, results from discrete water quality samples collected at this site are available through the U.S. Geological Survey National Water Information System web interface on the "Water Quality for the Nation" webpage. Analyses for pH, water temperature, specific conductance, and dissolved oxygen were performed on site. All other sample analyses were performed at the Pennsylvania Department of Environmental Protection laboratory in Harrisburg, Pa. Occasionally, values for filtered parameters may exceed values for the corresponding unfiltered parameter. These results are within the limits of analytical precision and methods.