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Water-Year Summary for Site 01491000

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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.
  • 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.,Min.,Mean)  
00060 Discharge(Mean)  
00095 Specific cond at 25C(Max.,Mean,Min.)  
00300 Dissolved oxygen(Mean,Max.,Min.)  
00400 pH(Max.,Med.,Min.)  
63680 Turbidity, Form Neph(Max.,Mean,Min.)  
99133 NO3+NO2,water,insitu(Max.,Min.,Mean)  

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

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USGS Water-Year Summary 2023
LOCATION - Lat 38°59'49.9", long 75°47'08.9" referenced to North American Datum of 1983, Caroline County, MD, Hydrologic Unit 02060005, on right bank at highway bridge (removed), 0.1 mi upstream from Gravelly Branch, 2.0 mi northeast of Greensboro, and 60 mi upstream from mouth.
DRAINAGE AREA - 113 mi².
REVISIONS HISTORY - WSP 1622: 1948. WDR MD-DE-79-1: 1961(P).
PERIOD OF RECORD - January 1948 to current year.
GAGE - Water-stage recorder, concrete control, and crest-stage gage. Datum of gage is 2.73 ft above North American Vertical Datum of 1988.
  • Water Year 2021-2023: Records good, except those above 1,000 ft³/s which are poor.  No estimated discharges.
  • Water Year 2020: Records good, no estimated discharges.
  • Water Year 2019: Records good, except those for estimated discharges, which are poor.
  • Water Years 2017-2018: Records good, no estimated discharges.
  • Water Year 2016: Records good, no estimated daily discharges.
  • Water Years 2014-2015: Records good, except those for estimated daily discharges, which are poor.
  • Water Year 2013 and prior years' accuracy statements can be found in Annual Water Data Reports.

  • Diversions for irrigation of about 500 acres, upstream from station. U.S. Geological Survey satellite data-collection platform at station.
    EXTREMES OUTSIDE PERIOD OF RECORD - Flood in 1935 is believed to have been higher than that of Aug. 4, 1967, from information by local residents.