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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
05542500 ILLINOIS RIVER AT MORRIS, IL
LOCATION - Lat 41°21'16.5", long 88°25'42.6" referenced to North American Datum of 1983, in SE 1/4 NW 1/4 NE 1/4 sec.9, T.33 N., R.7 E., Grundy County, IL, Hydrologic Unit 07120005,
DRAINAGE AREA - 7,483 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: August 2016 to current
STAGE: August 2016 to current.
DISCHARGE: August 2016 to current
STAGE: August 2016 to current.
GAGE - Water-stage recorder and satellite telemeter. Datum of gage is 478.17 ft above NAVD of 1988.
EXTREMES FOR PERIOD OF RECORD - SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 103,000ft³/s, May 19, 2020; gage height, 24.80 ft.; minimum discharge, 387 ft³/s, Nov. 15, 2023. Minimum gage height, 4.13 ft., Dec. 29, 2020.
