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All Maryland-Delaware-District of Columbia times are reported in Eastern Standard Time (EST). To convert to Eastern Daylight Time (EDT) add 1 hour.



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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 the Allegheny Energy Company, 
   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  2014-07-26
00065 Gage height 2014-03-28  2014-07-26

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Discharge, cubic feet per second

Most recent instantaneous value: 660   07-26-2014  09:15 EST
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Daily discharge, cubic feet per second -- statistics for Jul 26 based on 81 years of record more
Most Recent
Value Jul 26
Median Mean 75th
260 609 660 898 1260 1530 5120

Gage height, feet

Most recent instantaneous value: 2.93   07-26-2014  09:15 EST
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Title: USGS Current Conditions for Maryland

Page Contact Information: Maryland Water Data Support Team
Page Last Modified: 2014-07-26 11:10:31 EDT
1.28   0.93 nadww02