LOCATION.--Lat 41°25'25.6", long 91°28'42.7"
referenced to North American Datum of 1983, in NW 1/4 NE 1/4 NW 1/4
sec.6, T.76 N., R.5 W., Louisa County, IA, Hydrologic Unit 07080209,
on left bank 30 ft downstream from tri-county bridge on County
Highway W66, 5 mi southwest of Lone Tree, 6.2 mi downstream from
English River, and 46.6 mi upstream from mouth. (map)
DRAINAGE AREA.--4,293 mi2.
SURFACE-WATER RECORDS
PERIOD OF RECORD.--Discharge records from October 1956 to current
year.
GAGE.--Water-stage recorder. Datum of gage is 588.16 ft above
National Geodetic Vertical Datum of 1929. Prior to December 28, 1956,
non-recording gage at same site and datum.
REMARKS.--Flow regulated by Coralville Lake (station 05453510),
36.1 mi upstream, since September 17, 1958.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 2008, 2012.