LOCATION.--Lat 42°05'00", long 91°16'02"
referenced to North American Datum of 1927, in SW 1/4 NW 1/4 SW 1/4
sec.13, T.84 N., R.4 W., Jones County, IA, Hydrologic Unit 07080103,
on left bank 6 ft upstream from bridge on Shaw Road, 2.2 mi
downstream from dam in Anamosa, 1.1 mi downstream from mouth of Dutch
Creek and Fawn Creek, and 92.7 mi upstream from mouth. (map)
DRAINAGE AREA.--1,575 mi2.
PERIOD OF RECORD.--Discharge records from July 2002 to current
GAGE.--Water-stage recorder. Datum of gage is 755.00 ft above
National Geodetic Vertical Datum of 1929.
REMARKS.--Minor diurnal fluctuations during periods of low flow
due to operations of hydroelectric dam located 2.2 mi upstream.