USGS Water-Year Summary 2021
01578310 SUSQUEHANNA RIVER AT CONOWINGO, MD
LOCATION - Lat 39°39'28.4", long 76°10'28.0" referenced to North American Datum of 1983, Harford County, MD, Hydrologic Unit 02050306, 1.0 mi southwest of Conowingo, and 9.9 mi upstream from mouth.
DRAINAGE AREA - 27,100 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1967 to current year.
GAGE - Water-stage recorder. Datum of gage is 4.16 ft above North American Vertical Datum of 1988.