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Water-Year Summary for Site 05487470

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00060 Discharge(Mean)  

Water year 2021: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2021
05487470 South River near Ackworth, IA
LOCATION - Lat 41°20'14", long 93°29'10" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 SE 1/4 sec.34, T.76 N., R.23 W., Warren County, IA, Hydrologic Unit 07100008, on left bank 15 ft downstream from bridge on 168th Avenue, 2.2 mi southwest of Ackworth, 0.5 mi downstream from Otter Creek, and 13.7 mi upstream from mouth.
DRAINAGE AREA - 460 mi².
REVISIONS HISTORY - WSP 1438: Drainage area. WSP 1508: 1941, 1945(M), 1946.
PERIOD OF RECORD - Discharge records from March 1940 to current year.
GAGE - Water-stage recorder. Datum of gage is 769.97 ft above National Geodetic Vertical Datum of 1929. Prior to June 12, 1946, and April 14, 1960, to September 30, 1961, non-recording gage, and June 12, 1946, to April 13, 1960, water-stage recorder, all at site 4.0 mi downstream at datum 8.06 ft lower.
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS IA Water Science Center.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in June 1930 reached a stage of 24.50 ft, from information by local residents, discharge about 30,000 ft³/s, at site and datum in use prior to October 1, 1961.