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LOCATION.--Lat 39°29'08.1", long 76°38'44.6", Baltimore County, MD, Hydrologic Unit 02060003, on left
   bank of bridge on Maryland Route 45 (York Road) at Cockeysville, and 0.45 mi upstream from mouth.
DRAINAGE AREA.--20.9 mi2.
PERIOD OF RECORD.--October 1982 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 239.70 ft above North American Vertical
   Datum of 1988. Previously operated as a low-flow partial-record station during water years 1955-59
   and 1962-64 at same site. Dec. 15, 1982 to June 15, 1993, water-stage recorder 600 ft downstream and
   50 ft upstream from bridge on Beaverdam Run Lane at gage datum 1.38 ft lower.
REMARKS.--U.S. Geological Survey satellite data-collection platform at station. Water-quality records for
   some prior periods have been collected at this location.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 3,370 ft3/s, July 1, 1984, gage height, 12.10 ft;
   minimum discharge, 2.5 ft3/s, August 19, 20, 2002.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge known, 3,950 ft3/s on July 21, 1956, on basis of
   contracted opening measurement of peak flow at site approximately 0.25 mi downstream of Maryland
   Route 45 (York Road).
COOPERATION.--Funding for the operation of this station is provided by the Baltimore City Department of
   Public Works, and the U.S. Geological Survey.
Boating safety tips
This station managed by the MD-DE-DC Water Science Center Baltimore office.

Available Parameters Period of Record
1982-10-01  2019-11-19


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