PROVISIONAL DATA SUBJECT TO REVISION

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 
        station.
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:
        First Energy Corporation

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?