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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
06479515 WILLOW CREEK NEAR WATERTOWN, SD
LOCATION - Lat 44°55'08", long 97°02'43" referenced to North American Datum of 1927, in NE 1/4 NE 1/4 sec.27, T.117 N., R.52 W., Codington County, SD, Hydrologic Unit 10170201, on right downstream bank at bridge, about 6.7 river miles upstream from mouth, and about 4.0 mi northeast of Watertown.
DRAINAGE AREA - 109 mi².
REVISIONS HISTORY - WDR SD-00-1: 1972(M,P); 1977-80, 1983(M); 1984(M,P, June 15 daily discharge); 1985(M); 1986(M, P, Mar. 27-31 daily discharge). WDR SD-09-1: 1978(daily discharges for March 30-31).
SURFACE-WATER RECORDS
PERIOD OF RECORD - September 1971 to September 1986 daily streamflow. October 1996 to September 1997 crest-stage partial record. October 1999 to current year (seasonal mean daily gage heights and yearly instantaneous peak discharge).
GAGE -
Seasonal water-stage recorder. Datum of gage is 1,732.40 feet above the North American Vertical Datum of 1988 (NAVD88) and 1,731.29 feet above the National Geodetic Vertical Datum of 1929 (NGVD29).
Previous Datums are as follows:
Prior to October 1999, gage was about 2 miles downstream at datum of 1,721.24 feet above the National Geodetic Vertical Datum of 1929 (NGVD29).
REMARKS - Accuracy of records for water years prior to 2014 are noted in the individual Annual Data Reports for those water years. For water years 2014 onward, records good. Satellite data-collection platform at station. Peak gage height for the 2017 and 2023 water years are from floodmarks.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 3,650 ft³/s, Apr. 5, 1997, gage height, 10.93 ft (from floodmark, at different site and datum); maximum gage height, 13.69 ft, Apr. 11, 2023.
