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LOCATION.--Lat 42°21'17.1", long 94°59'25.2"
referenced to North American Datum of 1983, in NE 1/4 NW 1/4 NW 1/4
sec.13, T.87 N., R.36 W., Sac County, IA, Hydrologic Unit 07100006,
on left bank 50 ft upstream from bridge on 300th Street, 4.6 mi south
of Sac City, 2.1 mi upstream from Indian Creek, 0.3 mi upstream from
Drainage Ditch 73, 135.9 mi upstream from mouth, and 166.4 mi
upstream from mouth of Raccoon River. (map)
DRAINAGE AREA.--700 mi2.
PERIOD OF RECORD.--Discharge records from June 1958 to current
GAGE.--Water-stage recorder. Datum of gage is 1,146.03 ft above
National Geodetic Vertical Datum of 1929. Prior to October 1, 1987,
at site 1.7 mi downstream at datum 1.43 ft lower.
PERIOD OF RECORD.--Water years 2008-2010, 2012.
PERIOD OF DAILY RECORD.--
NITRATE + NITRITE: March 2008 to current year, records
WATER TEMPERATURE: March 2012 to current year.