USGS Water-Year Summary 2018
04092677 GRAND CALUMET RIVER AT INDUSTRIAL HWY AT GARY, IN
LOCATION - Lat 41°36'28", long 87°23'37" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.06, T.36 N., R.8 W., Lake County, IN, Hydrologic Unit 04040001, on left bank, 30 feet upstream of U.S. 12 (Industrial Highway), 100 feet streamward of the centerline of Interstate 90, 2,000 feet downstream of Norfolk and Western railroad bridge, 6,000 feet southeast of Gary Airport terminal.
DRAINAGE AREA - Indeterminate.
PERIOD OF RECORD - October 1991 to September 1994, (gage heights only), October 1994 to May 2001, December 2001 to current year.
GAGE - Water-stage recorder and Acoustic Doppler Velocity Meter. Datum of gage is 580.00 ft above National Geodetic Vertical Datum of 1929.