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Water-Year Summary for Site 05525000

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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.
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Available Parameters
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2019: 2018-10-01 to 2019-09-30
 

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USGS Water-Year Summary 2019
05525000 IROQUOIS RIVER AT IROQUOIS, IL
LOCATION - Lat 40°49'22", long 87°34'53" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.15, T.27 N., R.11 W., Iroquois County, IL, Hydrologic Unit 07120002, on left bank at downstream side of bridge on U.S. Highway 52 in Iroquois, 500 ft. upstream from a railroad bridge, 4.5 mi. downstream from the Indiana-Illinois State line, and at mile 50.4.
DRAINAGE AREA - 686 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
  DISCHARGE: October 1944 to current.
  STAGE: Water years 1994 to current.
SURFACE-WATER QUALITY
  CHEMICAL: Water years 1978-91 and 2009-2012. Additional chemical data for water
    years 1972-77 are published in Water-Resources Investigations 78-23
    and 79-24 as site FL 04.
  SEDIMENT: October 1978 to September 1980, January 1993 to December 1995.
GAGE - Water-stage recorder, satellite telemeter, and crest-stage gage. Datum of gage is 614.34 ft above NGVD of 1929 (614.12 ft NAVD 1988). Prior to Aug. 5, 1945, nonrecording gage at same site and datum.
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS IL Water Science Center.
EXTREMES FOR PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 10,400 ft³/s, June 13, 1958, gage height, 26.31 ft; minimum, 5.2 ft³/s, Sept. 13, 1964. SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 2,280 mg/L, June 2, 1980; minimum daily, 3 mg/L, Dec. 23, 24, 27-31, 1978. SUSPENDED-SEDIMENT LOADS: Maximum daily, 12,200 tons, June 3, 1980; minimum daily, 0.45 ton, Dec. 28, 1978.