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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.






USGS 01618000 POTOMAC RIVER AT SHEPHERDSTOWN, WV

PROVISIONAL DATA SUBJECT TO REVISION

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Click for larger imageClick for larger image LOCATION.--Lat 39°26'05.0", long 77°48'05.0", Jefferson County, 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 Elevation Dataset digital elevation model data, dated December 2011.
PERIOD OF RECORD.--August 1928 to September 1993. October 2000 to September 2004. September 2016 to current year.
REVISED RECORDS.--WSP 756: Drainage area. WSP 781: 1929(M). OFR 95-0292: Drainage area. waterdata.usgs.gov/nwis/inventory/?site_no=01618000 (2016): Drainage area.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 280.26 ft above North American Vertical Datum of 1988.
REMARKS.--Some regulation at low flow by power plants upstream from station, prior to July 1981 by Stony River Reservoir, since December 1950 by Savage River Reservoir (see station 01597500), and since July 1981 by Jennings Randolph Lake. Water-quality records for some prior periods have been collected at this location. U.S. Geological Survey satellite data-collection platform at station.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 335,000 ft3/s, from rating curve extended above 200,000 ft3/s, on the basis of slope-area measurement of peak flow, Mar. 19, 1936, gage height, 42.10 ft; minimum discharge, 170 ft3/s, Aug. 1, 1966.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of June 1889 reached a stage of 39.2 ft, from floodmarks, discharge, about 290,000 ft3/s. Flood of May 1924 reached a stage of 29.8 ft, from floodmarks, discharge, about 168,000 ft3/s.
COOPERATION.--Funding for the operation of this station is provided by the Interstate Commission on the Potomac River Basin, the Metropolitan Washington Council of Governments and the U. S. Geological Survey.
This station managed by the MD-DE-DC Water Science Center Frostburg office.

Available Parameters Available Period
All 2 Available Parameters for this site
  
00060 Discharge 2016-09-20  2017-04-25
00065 Gage height 2016-09-20  2017-04-25

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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: 4840 04-25-2017   01:30 EST
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Daily discharge, cubic feet per second -- statistics for Apr 25 based on 70 years of record more
Min
(1946)
25th
percen-
tile
Most Recent
Instantaneous
Value Apr 25
Median Mean 75th
percen-
tile
Max
(1983)
2470 4130 4840 5980 8980 10700 55800


Gage height, feet

Most recent instantaneous value: 3.72 04-25-2017   01:30 EST
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