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Water-Year Summary for Site 01636500

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  

Water year 2020: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2020
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.
REVISIONS HISTORY - 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.
PERIOD OF RECORD - April 1895 to March 1909 (monthly discharge published in WSP 1302), August 1928 to current year.
GAGE - Water-stage recorder. Datum of gage is 292.44 ft NAVD of 1988. 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.
PERIOD OF RECORD - June 2012 to current year.
SPECIFIC CONDUCTANCE: October 1980 to September 1983.
WATER TEMPERATURE: October 1980 to September 1983.  April 2019 to current year.
COOPERATION - This site is sampled as part of the Chesapeake Bay Program's Non-Tidal Monitoring Network in cooperation with the Maryland Department of Natural Resources.  Water temperature records in cooperation with the West Virginia Department of Natural Resources. 
Instantaneous Values:
SPECIFIC CONDUCTANCE: Maximum, 778 microsiemens/cm, Dec. 29, 1980; minimum, 192 microsiemens/cm, Feb. 9, 1983.
WATER TEMPERATURE: Maximum, 31.8°C, July 21, 2019; minimum, 0.0°C, on many days.