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- 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
06485500 BIG SIOUX RIVER AT AKRON, IA
LOCATION - Lat 42°50'15.1", long 96°33'41.8" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 SW 1/4 sec.30, T.93 N., R.48 W., Plymouth County, IA, Hydrologic Unit 10170203, on left bank 15 ft downstream from Iowa Highway 403 bridge, 0.5 mi northwest of Akron, and 2.9 mi upstream from Union Creek.
DRAINAGE AREA - 7,879 mi² of which 884 mi² probably is noncontributing. documented runoff occurred during Water Years 1994-2002 for 213 mi² of the usually noncontributing area.
REVISIONS HISTORY - WSP 1309: 1929(M), 1931-33(M), 1936(M), 1938(M), 1940(M). WDR SD-10-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1928 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,119.53 ft above NAVD88. Prior to conversion to NAVD88, datum was published as 1,118.90 ft above NGVD29. Prior to Dec. 3, 1934, nonrecording gage at bridge 0.5 mi downstream at datum of 1,118.90 ft above NGVD29. From Dec. 3, 1934, to Oct. 31, 1985, water-stage recorder at site 0.6 mi downstream at datum of 1,118.90 ft above NGVD29.
REMARKS - Record quality ratings may not be included in the water-year summary for approved records newer than Sept. 30, 2018. Record quality is still being rated internally. For questions about record quality ratings, please send email to gs-w-sd_NWISWEB_Data_Inquiries@usgs.gov. Satellite data-collection platform at station.
