LOCATION.--Lat 41°48'45.8", long 92°03'52.6"
referenced to North American Datum of 1927, in SE 1/4 SE 1/4 NE 1/4
sec.24, T.81 N., R.11 W., Iowa County, IA, Hydrologic Unit 07080208,
on left bank 5 ft upstream from bridge on County Highway V66, 0.8 mi
north of Marengo, 1.0 mi downstream from Big Bear Creek, 4.6 mi
upstream from Hilton Creek, and 134.1 mi upstream from mouth.
(map)
DRAINAGE AREA.--2,794 mi2.
SURFACE-WATER RECORDS
PERIOD OF RECORD.--Discharge records from October 1956 to current
year. Prior to January 1957, monthly mean discharge for some periods
published in WSP 1728.
REVISED RECORDS.--WSP 1558: 1957.
GAGE.--Water-stage recorder. Datum of gage is 720.52 ft above
National Geodetic Vertical Datum of 1929.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 2008-2010, 2012.