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Notice - The USGS Water Resources Mission Area's priority is to maintain the safety and well-being of our communities, including providing critical situational awareness in times of f
looding in all 50 U.S. states and additional territories. Our hydrologic monitoring stations continue to send data in near real-time to NWISWeb, and we are continuing critical water monitori
ng activities to protect life and property on a case-by-case basis. The health and safety of the public and our employees are our highest priorities, and we continue to follow guidance from
the White House, the CDC, and state and local authorities.
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.
PERIOD OF RECORD.--Discharge records from October 1956 to current
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.