USGS Water-Year Summary 2021
01618000 POTOMAC RIVER AT SHEPHERDSTOWN, WV
LOCATION - Lat 39°26'05.0", long 77°48'05.0" referenced to North American Datum of 1983, Jefferson County, WV, Hydrologic Unit 02070004, on right bank, 0.1 mi downstream from Rumsey Bridge at Shepherdstown, 3.3 mi upstream from Antietam Creek, and at mile 184.
DRAINAGE AREA - 5,953 mi². from automated delineation using 30-meter National Elevataion Dataset, digital elevation model data, dated December 2011.
- WSP 756: Drainage area. WSP 781: 1929(M). OFR 95-0292: Drainage area. http://waterdata.usgs.gov/nwis/inventory/?site_no=01618000 (2016)
: Drainage area.
PERIOD OF RECORD - August 1928 to September 1953. Annual maximums, water years 1954-64. July 1964 to September 1993, October 2000 to September 2004, September 2016 to current year. Gage-height record and estimated discharges October 1953 to June 1964 available in files of the MD-DE-DC WSC.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 280.26 ft above North American Vertical Datum of 1988.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of June 1889 reached a stage of 39.2 ft, from floodmarks, discharge, about 290,000 ft³/s from rating curve extended above 200,000 ft³/s, on the basis of slope-area measurement of peak flow. Flood of May 1924 reached a stage of 29.8 ft, from floodmarks, discharge, about 168,000 ft³/s.