05559600 ILLINOIS RIVER AT CHILLICOTHE, IL
LOCATION.--Lat 40°55'45", long 89°27'42", in NW1/4 sec.22, T.11 N., R.9 W., Peoria County, Hydrologic Unit 07130001, at center
of Atchison, Topeka and Sante Fe Railroad bridge, 1 mi north of Chillicothe and at mile 181.9.
DRAINAGE AREA.--Not determined.
PERIOD OF RECORD.--May 1993 to current year.
PERIOD OF DAILY RECORD.--
SUSPENDED SEDIMENT: May 1993 to current year.
REMARKS.--Records of discharge are given for Illinois River at Henry (station 05558300). Suspended-sediment samples were
collected by a local observer once weekly with additional samples collected during high runoff periods. Samples were not collected
(and data are not published) during periods of ice.
EXTREMES FOR PERIOD OF DAILY RECORD.--
SEDIMENT CONCENTRATIONS: Maximum daily, 491 mg/L, July 20, 1996; minimum daily, 16 mg/L, Mar. 7, 1998.
SEDIMENT LOADS: Maximum daily, 93,800 tons, July 20, 1996; minimum daily, 177 tons, Oct. 5, 1997.
EXTREMES FOR CURRENT YEAR.--
SEDIMENT CONCENTRATIONS: Maximum daily, 204 mg/L, June 13; minimum daily, 16 mg/L, Mar. 7.
SEDIMENT LOADS: Maximum daily, 24,800 tons, Mar. 20; minimum daily, 177 tons, Oct. 5.