LOCATION.-- Lat 38°36'36", long 89°29'41" (NAD of 1983), in SW1/4SW1/4 sec.13, T.2 N., R.4 W., Clinton County, Hydrologic Unit 07140203, on right bank at upstream side of bridge on old U.S. Highway 50, 0.4 mi upstream from railroad bridge, 1.7 mi east of Breese, 7 mi upstream from Beaver Creek, and at mile 21.3.

DRAINAGE AREA.-- 735 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: November 1909 to December 1912, August to December 1914, October 1945 to current year.

STAGE: Water years 1994 to current year.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1979-91.

MISCELLANEOUS: Water Years 1998 and 2002.

REVISED RECORDS.-- 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 413.97 ft above NGVD of 1929 (413.58 ft NAVD 1988). Prior to Dec. 8, 1914, chain gage at site 0.4 mi downstream at different datum. Oct. 1, 1945, to Oct. 10, 1968, nonrecording gage at present site and datum.

REMARKS.-- About 1.03 ft³/s diverted 20 ft above station for municipal supply of Breese is not included in records.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 23,300 ft³/s, May 9, 2002, gage height, 22.10 ft; maximum gage height, 23.02 ft, April 14, 1979, during period of constricted channel due to bridge construction; no flow for many days in 1954-56, 1988.

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Flood of May 19, 1943, reached a stage of 25.6 ft, present site and datum, discharge, 52,000 ft³/s on basis of contracted opening measurement of peak flow.