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LOCATION.--Lat 38°58'21.0", long 77°02'24.0", Washington, DC, Hydrologic Unit 02070010,
on left bank 125 ft downstream from Sherrill Drive Bridge in Rock Creek Park in Washington,
and 7.5 mi upstream from mouth.
DRAINAGE AREA.--62.2 mi2.
PERIOD OF RECORD.--October 1929 to current year.
GAGE.--Water-stage recorder, crest-stage gage, and concrete control. Datum of gage is 148.87 ft
above National Geodetic Vertical Datum of 1929.
REMARKS.--U.S. Geological Survey satellite collection platform at station. Flow affected by two
upstream reservoirs which control flow from about 25 mi2. Needwood Lake on Rock Creek since Sept. 1966
and Bernard Frank Lake on North Branch Rock Creek since February 1968.
COOPERATION.--Funding for the operation of this station is provided by the District of Columbia
Department of the Environment, and the U.S. Geological Survey.
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