PROVISIONAL DATA SUBJECT TO REVISION

 
STATION.--01647600 POTOMAC RIVER AT WISCONSIN AVE., WASHINGTON, D.C.
LOCATION.--Lat 38°54'08.4", long 77°03'45.9", District of Columbia, Hydrologic Unit 02070010,
   on left bank at foot of Wisconsin Ave. (Georgetown), 0.35 mi upstream from mouth of Rock Creek,
   0.4 mi downstream from Key Bridge, and at river mile 112.2.
DRAINAGE AREA.--N/A.
PERIOD OF RECORD.--April 1935 to current year.
GAGE.--Water-stage recorder. Datum of gage is Washington Mean Low Water
   (Washington Mean Low Water = Mean Sea Level + 1.41 ft). 
EXTREMES FOR PERIOD OF RECORD.--Maximum tidal gage height, 17.72 ft (D.C. MLW), Oct. 17, 1942.
COOPERATION.--Funding for the operation of this station is provided by the U.S. Army Corps of
   Engineers, and the U.S. Geological Survey.