PROVISIONAL DATA SUBJECT TO REVISION

LOCATION.--Lat 39°37'08.0", long 76°41'25.1", Baltimore County, Hydrologic Unit 02060003,
   on left bank at downstream side of bridge on Falls Road, and 1.0 mi downstream from Prettyboy Reservoir.
DRAINAGE AREA.--81.5 mi2.
PERIOD OF RECORD.--July 2000 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Elevation of gage is 360 ft above National Geodetic 
   Vertical Datum of 1929, from topographic map. November 1982 to November 1990, non-recording gage 100 ft downstream. 
REMARKS.--Flow regulated by Prettyboy Reservoir 1.0 mi upstream, beginning April 10, 1933,
   for water supply of Baltimore City (usable capacity, 20,000,000,000 gal; dead storage, 1,080,000,000 gal).
   U.S. Geological Survey satellite data-collection platform at station.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 9,000 ft3/s, September 8, 2011,
   gage height, 11.62 ft; minimum discharge, 5.0 ft3/s, Oct. 24, 2002.
COOPERATION.--Funding for the operation of this station is provided by the Baltimore City Department of
   Public Works, and the U.S. Geological Survey.