USGS Water-Year Summary 2021
05463500 Black Hawk Creek at Hudson, IA
LOCATION - Lat 42°24'28", long 92°27'47" referenced to North American Datum of 1927, in SE 1/4 SW 1/4 NE 1/4 sec.27, T.88 N., R.14 W., Black Hawk County, IA, Hydrologic Unit 07080205, on left bank 35 ft downstream from bridge on State Highway 58, 0.2 mi northwest of Chicago and Great Western Railway tracks, at western edge of Hudson, 4.5 mi upstream from Prescotts Creek, and 12.5 mi upstream from mouth.
DRAINAGE AREA - 303 mi².
- WSP 1438: Drainage area.
PERIOD OF RECORD - Discharge records from April 1952 to September 1995, October 2001 to current year.
GAGE - Water-stage recorder. Datum of gage is 865.03 ft above National Geodetic Vertical Datum of 1929.
PERIOD OF RECORD - Water years 1988, 1990, 2001-2002, 2011-2012. Period of record includes water-quality data published in USGS annual reports and various project reports.