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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 40°43'40", long 91°57'34"
referenced to North American Datum of 1927, in NE 1/4 SE 1/4 SW 1/4
sec.36, T.69 N., R.10 W., Van Buren County, IA, Hydrologic Unit
07100009, on left bank on downstream side of bridge on State Highway
1 in Keosauqua, 4.0 mi downstream from Chequest Creek, and 49.3 mi
upstream from mouth. (map)
DRAINAGE AREA.--14,038 mi2.
PERIOD OF RECORD.--Discharge records from May 1903 to July 1906,
April to December 1910, August 1911 to current year. Prior to April
1918, monthly mean discharge for some periods published in WSP
GAGE.--Water-stage recorder. Datum of gage is 547.36 ft above
National Geodetic Vertical Datum of 1929. Prior to December 25, 1933,
non-recording gage, and December 25, 1933, to September 30, 1972,
water-stage recorder, both at same site at datum 10.00 ft higher.
REMARKS.--Prior to December 21, 1958, and since November 30, 1960,
minor diurnal fluctuations during periods of low and medium flows due
to operations of power plant located 43.3 mi upstream. Flow regulated
by Lake Red Rock (station 05488100), 91.0 mi upstream, since March
PERIOD OF RECORD.--Water years 2004 to current year.