USGS Water-Year Summary 2022
01583600 BEAVERDAM RUN AT COCKEYSVILLE, MD
LOCATION - Lat 39°29'08.1", long 76°38'44.6" referenced to North American Datum of 1983, 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.
- WDR MD-DE-88: 1983-87.
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.
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).