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Water-Year Summary for Site 01484080

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  • 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.
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  • Not all sites have reports available for every water year.
Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00065 Gage height(Tid.,Tid.) [NAVD88]  
00065 Gage height(Tid.,Tid.) [NGVD29, Discontinued]  
00095 Specific cond at 25C(Max.,Min.,Mean)  
00300 Dissolved oxygen(Max.,Min.,Mean)  
00400 pH(Max.,Min.,Med.)  
72137 Discharge,tide fltrd(Mean)  

Water year 2022: 2021-10-01 to 2022-09-30
 
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USGS Water-Year Summary 2022
01484080 MURDERKILL RIVER AT FREDERICA, DE
LOCATION - Lat 39°00'37.8", long 75°27'29.9" referenced to North American Datum of 1983, Kent County, DE, Hydrologic Unit 02040207, on right bank, 300 ft downstream of Route 1 bridge, 0.2 mi downstream of confluence with Spring Creek, 0.5 mi east of Frederica, and 7.4 mi upstream from mouth.
DRAINAGE AREA - 82.8 mi².
REVISIONS HISTORY - WDR-US-2013: 2011-2012 (DO).
SURFACE-WATER RECORDS
PERIOD OF RECORD - April 1997 to September 1999 (stage only); September 17-30, 2002 (located at upstream side of State Route 1 highway bridge, stage only); June 2007 to December 2008; June 2010 to current year.
GAGE - Water-stage recorder and velocity meter. Datum of gage is 0.00 ft above North American Vertical Datum of 1988. Prior to October 1, 2016, at datum 0.78 ft higher (NGVD29).
REMARKS -
  • Water Years 2020-2021: Gage-height record good and discharge record fair, except for estimated discharges, which are poor. Missing data due to equipment malfunction.
  • Water Year 2019: Gage-height record good and discharge record fair. Missing data due to equipment malfunction.
  • Water Year 2018: Gage-height record good and discharge record fair, except for estimated discharges, which are poor. Missing data due to equipment malfunction.
  • Water Year 2017: Gage-height record good and discharge record fair. Missing data due to equipment malfunction.
  • Water Years 2014-2016: Gage-height record good and discharge record fair. Missing data due to equipment malfunction.
  • Water Year 2013 and prior years’ accuracy statements can be found in Annual Water Data Reports.

    • This is a tidal discharge station. Discharge is computed from relations between stage vs. area and index velocity vs. mean channel velocity. Daily mean discharges were computed using the Godin low-pass filter to remove tidal effects from unit values. U.S. Geological Survey satellite data-collection platform at station.
    EXTREMES FOR PERIOD OF RECORD - Maximum recorded elevation, 5.17 ft, August 28, 2011; minimum recorded elevation, -4.33 ft, November 22, 2016. Maximum discharge, 4,800 ft³/s, August 28, 2011; minimum discharge -5,770 ft³/s, May 12, 2008.
    WATER-QUALITY RECORDS
    PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: June 2007 to December 2008, June 2010 to current year. WATER TEMPERATURE: June 2007 to December 2008, June 2010 to current year. pH: June 2007 to December 2008, July 2010 to current year. DISSOLVED OXYGEN: June 2007 to December 2008, June 2010 to current year.
    COOPERATION - Funding for water-quality data collection is provided by the Delaware Department of Natural Resources and Environmental Protection, and the United States Geological Survey.
    INSTRUMENTATION - Multi-parameter water-quality monitor, June 2007 to December 2008, June 2010 to current year.
    REMARKS - Occasional missing record due to periodic instrument malfunction.
    EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 32.7 °C, July 21, 2019; minimum, -1.2 °C, Jan. 23, 2016.

    SPECIFIC CONDUCTANCE: Maximum, 44,800 microsiemens/cm, August 21, 2016; minimum, 96 microsiemens/cm, Sept. 5, 2020. 

    pH: Maximum, 9.3 standard units, April 15, 2018; minimum, 6.1 standard units, multiple occurrences recorded, first occurrence recorded on May 21, 2018.

    DISSOLVED OXYGEN: Maximum, 15.7 mg/L, multiple occurrences recorded, first occurrence record on April 12, 2018; minimum, 0.6 mg/L, August 4, 2011.