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    LOCATION.--Lat 39°16'55", long 77°47'22", 
          referenced to North American Datum of 1927, Jefferson County, WV, Hydrologic Unit 02070007, 
          on left bank 0.4 mi downstream from Cattail Run, 1.0 mi upstream from Millville, 
          5.0 mi upstream from Harpers Ferry, and at mile 4.7.
    DRAINAGE AREA.--3,041 mi2.
    PERIOD OF RECORD.--April 1895 to March 1909 (monthly discharge published in WSP 1302 and annual maxima), 
          August 1928 to current year (daily discharge and peaks).
    REVISED RECORDS.--WSP 951: 1936(M). WSP 1432: 1895-99, 1901-02, 1905, 1907-08, 1932(M), 1935(M). 
          WDR WV-97-1: Drainage area. WDR-US-2006: Drainage area.
    GAGE.--Water-stage recorder with satellite telemeter. Datum of gage is 292.44 ft above NAVD 88 
          (GPS levels). Apr. 15, 1895 to Mar. 31, 1909, nonrecording gage at site 0.8 mi downstream 
           at datum 0.32 ft higher.
    REMARKS.--Some regulation by upstream hydroelectric plants, including 
            that of Potomac Light and Power Company, 0.5 mi upstream from 
    EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of 1870 reached a stage of about 26.4 ft 
          (about the same as the flood of Mar. 18, 1936, at current site and datum), 
          discharge, about 151,000 ft3/s. Flood of May 13, 1924, reached a stage of 21.10 ft 
          (at site and datum in use Apr. 15, 1895 to Mar. 31, 1903), discharge, 119,000 ft3/s.
    This gaging station is maintained in cooperation with:
            PE Hydro Generation, LLC

    Current shift adjusted stage-discharge rating table. These tab delimited tables are updated daily and can change frequently. If you use these ratings, it is important that you update often so that you have the most current version.
    What is a shift adjusted stage-discharge rating?

    This station managed by the Leetown Field Office.

    Available Parameters Available Period
    All 2 Available Parameters for this site
    00060 Discharge 2007-10-01  2014-09-02
    00065 Gage height 2014-05-05  2014-09-02

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    Days  (7)

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    Summary of all available data for this site
    Instantaneous-data availability statement

    Discharge, cubic feet per second

    Most recent instantaneous value: 799   09-02-2014  16:30 EDT
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    Daily discharge, cubic feet per second -- statistics for Sep 2 based on 100 years of record more
    Most Recent
    Value Sep 2
    Median Mean 75th
    260 613 799 820 1250 1310 7810

    Gage height, feet

    Most recent instantaneous value: 1.82   09-02-2014  16:30 EDT
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