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During cold weather, ice effects on stage, groundwater levels, precipitation and water quality parameters at some stream-gaging stations and wells are likely. Data values reported on these pages may be significantly higher or lower than actual values. Adjustment of data for ice effects can only be done after detailed analysis. Users are encouraged to contact this office for more information on specific stream-gaging stations or wells.
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. Datum of gage is 355.43 ft above North American Vertical Datum of 1988. 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.
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Value Jan 31