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[!] During cold weather, ice effects on stage, groundwater levels, precipitation and water quality parameters at some stream-gaging stations and wells 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 stream-gaging stations or wells.




USGS 01613000 POTOMAC RIVER AT HANCOCK, MD

PROVISIONAL DATA SUBJECT TO REVISION

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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.--4,064 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.--WSP 781: 1933(M). WDR WV-97-1: Drainage area. OFR 95-292 (Second edition, 2006): Drainage area.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 383.00 ft above North American Vertical Datum of 1988.
   Oct. 1, 1932, to Jan. 5, 1935, Mar. 18, 1936, to  Jan. 20, 1937, nonrecording gage, on former highway
   bridge just upstream at same gage 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 (see station 01597500), and since 
   July 1981 by Jennings Randolph Lake. National Weather Service gage-height telemeter at station. 
   U.S. Army Corps of Engineers satellite data-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 PE Hydro Generation, LLC, 
   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 2007-10-01  2014-12-18
00065 Gage height 2014-08-20  2014-12-18

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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: 2,400   12-18-2014  09:15 EST
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Daily discharge, cubic feet per second -- statistics for Dec 18 based on 82 years of record more
Min
(1944)
25th
percen-
tile
Most Recent
Instantaneous
Value Dec 18
Median Mean 75th
percen-
tile
Max
(1949)
310 1430 2400 3020 4010 5200 28800


Gage height, feet

Most recent instantaneous value: 4.34   12-18-2014  09:15 EST
Graph of  Gage height, feet

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