LOCATION.-- Lat 38°56'11", long 88°01'21" (NAD of 1927), in NW1/4NW1/4 sec.30, T.6 N., R.14 W., Jasper County, Hydrologic Unit 05120112, on right bank at upstream side of bridge on County Highway 9 at Ste. Marie, and at mile 48.2.

DRAINAGE AREA.-- 1,516 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: August 1908 to December 1912, August 1914, October 1914 to current year.

STAGE: Water years 1994 to current year.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978-93.

REVISED RECORDS.-- WSP 1083: 1934. WSP 1113: 1910-31, 1933, 1939-40, 1945(M). WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter, and crest-stage gage. Datum of gage is 445.75 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to June 29, 1940, nonrecording gage and June 29, 1940, to Jan. 24, 1967, water-stage recorder at same site at datum 1.00 ft higher.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 44,800 ft³/s, Jan. 4, 1950, from rating curve extended above 29,000 ft³/s, gage height, 25.95 ft, present datum; maximum gage height, 26.54 ft, June 30, 1957, present datum; minimum discharge, 1.0 ft³/s, observed, Oct. 5-9, 1914.