LOCATION.-- Lat 39°01'13", long 87°34'07" (NAD of 1927), in NE1/4SW1/4 sec.30, T.7 N., R.10 W., Sullivan County, Hydrologic Unit 05120111, (MEROM, IN-IL. quadrangle), on left bank at downstream side of Illinois Central Railroad bridge at Riverton, 0.5 mi downstream from Turtle Creek, 2 mi south of Merom, and at mile 162.0.

DRAINAGE AREA.-- 13,161 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1938 to current year. Prior to April 1939, monthly discharge only published in WSP 1305.

STAGE: June 1911 to December 1914 available in the U.S. Army Corps of Engineers office, Louisville, Ky.

REVISED RECORDS.-- WSP 1335: 1939, 1950. WDR IN-73-1: Drainage area.

GAGE.-- Water-stage recorder. Datum of gage is 414.65 ft above NGVD of 1929. Prior to July 17, 1951, nonrecording gage at same site and datum.

REMARKS.-- Flow partially regulated by upstream reservoirs.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 201,000 ft³/s, May 21, 1943, gage height 29.36 ft; minimum daily discharge, 858 ft³/s, September 27, 1941.

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Flood of March 28, 1913, reached a stage of 26.4 ft, from graph based on once daily readings by Illinois Central Railroad Co., discharge, 250,000 ft³/s.