PROVISIONAL DATA SUBJECT TO REVISION

STATION.--01613000 POTOMAC RIVER AT HANCOCK, MD
LOCATION.--Lat 39°41'51.2", long 78°10'40.4", Washington County, Hydrologic Unit 02070004,
   on left bank, 0.2 mi downstream from Little Tonoloway Creek, 0.5 mi downstream from bridge on U.S.
   Highway 522  at Hancock, 1.1 mi upstream from Tonoloway Creek (formerly called Great or
   Big Tonoloway Creek), and at mile 239.
DRAINAGE AREA.--4,090 mi2.
PERIOD OF RECORD.--October 1932 to current year. Gage-height records  collected at same site since
   June 1925 are contained in reports of National Weather Service.
REVISED RECORDS.--OFR 95-0292: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 383.68 ft above National Geodetic Vertical Datum of 1929.
   Oct. 1, 1932, to Jan. 5, 1935, Mar. 18, 1936, to  Jan. 20, 1937, nonrecording gage, on former highway
   bridge just upstream at same datum.
REMARKS.--Slight regulation at low flow from power plants upstream.  Low flow affected slightly by 
   Stony River Reservoir prior to July 1981, since December 1950 by Savage River Reservoir, and since
   July 1981 by Jennings Randolph Lake. National Weather Service gage-height telemeter at station.
   U.S. Army Corps of Engineers satellite collection platform at station.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 340,000 ft3/s, Mar. 18, 1936,
   gage height, 47.60 ft; minimum discharge, 180 ft3/s, Oct. 4, 1932.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum stage known prior to 1932, about 40 ft in May 1889,
   discharge, about 220,000 ft3/s.
COOPERATION.--Funding for the operation of this station is provided by  the Interstate Commission on the
   Potomac River Basin, U.S. Army Corps of Engineers, and the U.S. Geological Survey.