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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.
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USGS Water-Year Summary 2024
05536121 CHICAGO RIVER AT CHICAGO LOCK AT CHICAGO, IL
LOCATION - Lat 41°53'21.4", long 87°36'28.6" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 SE 1/4 sec.10, T.39 N., R.14 E., Cook County, IL, Hydrologic Unit 07120003, 0.2 mi east of Lake Shore Drive in Chicago, on the right downstream side of lock guidewall, 190 feet North of the river-side lock gates at the Chicago River Lock and Dam.
DRAINAGE AREA - Indeterminate.
SURFACE-WATER RECORDS
PERIOD OF RECORD - STAGE: August 1997 to September 2003, Oct. 2007 to current.
GAGE - Water-stage recorder and satellite telemeter. Datum of gage is 579.20 ft above North American Vertical Datum of 1988 and 0.00 ft Chicago City Datum (579.48 ft NGVD29).
REMARKS - Stages regulated by Chicago River Controlling Works about 35 miles downstream from gage.
EXTREMES FOR PERIOD OF RECORD -
STAGE: Maximum gage height, 4.14 ft, Aug. 16, 1997; minimum, -4.41 ft., March 14, 2011, due to regulation.
STAGE: Maximum gage height, 4.14 ft, Aug. 16, 1997; minimum, -4.41 ft., March 14, 2011, due to regulation.
