Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins

Water-Year Summary for Site 01451500

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(Max.,Mean,Min.)  
00060 Discharge(Mean)  
00095 Specific cond at 25C(Max.,Mean,Min.)  

Water year 2021: 2021-10-01 to 2022-09-30

Print this page
USGS Water-Year Summary 2021
LOCATION - Lat 40°34'56", long 75°29'00" referenced to North American Datum of 1927, Lehigh County, PA, Hydrologic Unit 02040106, on right bank at downstream side of bridge on Lehigh Parkway in Allentown, 0.8 mi upstream from Cedar Creek, and 2.9 mi upstream from mouth.
DRAINAGE AREA - 80.8 mi².
REVISIONS HISTORY - WDR PA 73-1: 1946(M), 1951(P), 1955(M), 1956(M), 1958(M), 1962(M), 1963(M), 1965(M), 1969(M), 1971(M). WDR PA-87-1: 1946 to 1986(P).
PERIOD OF RECORD - October 1945 to current year. Prior to October 1946, published as "at Allentown".
GAGE - Water-stage recorder, crest-stage gage, and water-quality monitor. Datum of gage is 253.41 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 Pennsylvania Department of Environmental Protection and the U.S. Geological Survey.
REMARKS - Occasional regulation at low flow by fish hatchery upstream. Records for water year 2014 are fair, except those for estimated daily discharges, which are poor. Records for water year 2015-2016 are fair, except those above 350 cfs and for estimated daily discharges, which are poor. Records for water year 2017 are good, except those above 300 cfs, which are poor. Records for water year 2018-2020 are good, except those above 1300 cfs, which are poor.
PERIOD OF DAILY RECORD - October 2019 to current.
COOPERATION - Funding for the operation of this station is provided by the U.S. Geological Survey.
INSTRUMENTATION - Specific conductance and water temperature sonde interfaced with a data collection platform, logging at 15-minute interval.
EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 990 microsiemens/cm, Feb 20, 2021; minimum, 87 microsiemens/cm, Aug 4, 2020. WATER TEMPERATURE: Maximum, 23.9 °C, Aug 3, 2020; minimum, 0.5°C, Feb 1, 2021.