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Water-Year Summary for Site 01493000

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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
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
01493000 UNICORN BRANCH NEAR MILLINGTON, MD
LOCATION - Lat 39°14'59.8", long 75°51'41.4" referenced to North American Datum of 1983, Queen Anne's County, MD, Hydrologic Unit 02060002, at downstream side of bridge on State Highway 313, 0.9 mi upstream from mouth, and 1.4 mi southwest of Millington.
DRAINAGE AREA - 19.7 mi².
REVISIONS HISTORY - WSP 1382: 1952(P). WRD MD-DE-95-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - January 1948 to September 2005; October 2006 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 2.78 ft above North American Vertical Datum of 1988. Prior to October 1, 2013, gage located on right bank, 60 ft upstream at same gage datum.
REMARKS -
  • Water Years 2018-2023: Records good, except those for estimated discharges, which are poor.
  • Water Year 2017: 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.

    • Occasional regulation at low and medium flow by Unicorn Lake Dam upstream from station. U.S. Geological Survey satellite data-collection platform at station.