LOCATION.-- Lat 41°10'58", long 87°20'25" (NAD of 1927), in SW1/4NE1/4 sec.33, T.32 N., R.8 W., Lake County, Hydrologic Unit 07120001, (SHELBY, IN quadrangle), on right bank at upstream side of Highway 55 bridge, 1.0 mi south of Shelby, 7.8 mi upstream from Beaver Lake Ditch, and at mile 68.0.

DRAINAGE AREA.-- 1,779 mi², of which 201 mi² does not contribute directly to surface runoff.

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1922 to current year. Monthly discharge only for some periods published in WSP 1308.

SURFACE-WATER QUALITY

SEDIMENT: Water years 1993-96.

REVISED RECORDS.-- WSP 1005: 1928(M). WSP 2115: Drainage area.

GAGE.-- Water-stage recorder. Datum of gage is 628.13 ft above NGVD of 1929 (627.84 ft NAVD 1988). Prior to Dec. 19, 1934, nonrecording gage, Dec. 19, 1934, to Oct. 4, 1965, water-stage recorder on left bank 50 ft downstream, Oct. 5, 1965, to Sept. 21, 1966, nonrecording gage on right bank 200 ft downstream, and Sept. 21, 1966 to July 21, 1998, water-stage recorder on right bank 25 ft upstream from Monon railroad bridge and approximately 400 ft downstream, all at same datum.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 7,650 ft³/s, March 26, 1982, maximum gage height 12.98 ft, March 24, 1982; minimum daily discharge, 260 ft³/s, January 13, 1954.