PROVISIONAL DATA SUBJECT TO REVISION

LOCATION.--Lat 39°24'10.2", long 77°21'57.9", Frederick County, Hydrologic Unit 02070009,
   on right bank 500 ft downstream from Interstate 70 highway bridge, 0.4 mi downstream from Linganore Creek,
   2.0 mi east of Frederick, and 16.9 mi upstream from mouth.
DRAINAGE AREA.--817 mi2.
PERIOD OF RECORD.--October 1929 to current year.  Monthly discharge only for October, November 1929,
   published in WSP 1302.
REVISED RECORDS.--WSP 711:  1930.
GAGE.--Water-stage recorder.  Nonrecording gage at site 0.2 mile downstream. Datum of gage is
   231.92 ft above National Geodetic Vertical Datum of 1929.
REMARKS.--Occasional regulation at low and medium flows since September 1972 by Linganore Reservoir,
   total capacity, 883,200,000 gal, 2.8 mi upstream from station. National Weather Service gage-height
   telemeter at station. U.S. Geological Survey satellite collection platform at station. Water-quality records for
   some prior periods have been collected at this location.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 81,600 ft3/s, June 23, 1972,
   gage height, 35.90 ft; minimum discharge, 17 ft3/s,  Sept. 11, 13, 1966.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood in June 1889 reached a stage of 30 ft, from floodmarks,
   discharge, 56,000 ft3/s.
COOPERATION.--Funding for the operation of this station is provided by the Maryland State Highway Administration,
   and the U.S. Geological Survey.