LOCATION.-- Lat 38°24'07", long 87°45'10" (NAD of 1927), in SE1/4NW1/4 sec.28, T.1 S., R.12 W., Wabash County, Illinois, Hydrologic Unit 05120113, (MOUNT CARMEL, IL-IN quadrangle), on right bank on downstream side of Southern Railway bridge at Mount Carmel, 0.2 mi downstream from Patoka River, 0.2 mi upstream of State Road 64 bridge, and at mile 94.4.

DRAINAGE AREA.-- 28,635 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1927 to current year.

STAGE: January 1908 to September 1913. Gage-height records November 1874 to December 1878 in files of Louisville office of the U.S. Army Corps of Engineers, and since June 1884, in reports of the National Weather Service.

REVISED RECORDS.-- WDR IN-73-1: Drainage area.

GAGE.-- Water-stage recorder. Datum of gage is 369.46 ft above NGVD of 1929. Oct. 1, 1949, to Feb. 8, 1977, at datum 2.00 ft higher. See WSP 1725 for history of changes prior to Sept. 30, 1949.

REMARKS.-- Flow partially regulated by upstream reservoirs.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 305,000 ft³/s, May 25, 1943, maximum gage height, 31.75 ft, January 7, 1991; minimum daily discharge, 1,650 ft³/s, September 27, 1941.

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: (1874-78, 1884 to 1985) Maximum discharge, 428,000 ft³/s, Mar. 30, 1913, gage height, 33.0 ft, present site and datum.