Click
to
hide
Water-Year
Summary
instructions
and
information
- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
05487470 South River near Ackworth, IA
LOCATION - Lat 41°20'16.4", long 93°29'11.1" referenced to North American Datum of 1983, 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.
Computed record revisions: 5/14/23 - 6/1/23, 9/27/23 - 10/3/23.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Discharge records from March 1940 to current year.
GAGE - Water-stage recorder. Datum of gage is 769.84 ft above North American Vertical Datum of 1988. 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.
