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During cold weather, ice effects on stage and discharge determinations at some stream-gaging stations are likely. Data values reported on these pages may be significantly higher or lower than actual values. Adjustment of data for ice effects can only be done after detailed analysis. Users are encouraged to contact this office for more information on specific sites.
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: 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?
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Value Mar 6