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. (map)

DRAINAGE AREA.--303 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--Discharge records from April 1952 to September 1995, October 2001 to current year.

REVISED RECORDS.--WSP 1438: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 865.03 ft above National Geodetic Vertical Datum of 1929.

WATER-QUALITY RECORDS

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.

Advanced Hydrologic Prediction Service

Iowa DNR Geological & Water Survey

National Streamflow Information Program