LOCATION.-- Lat 38°46'23", long 88°29'50" (NAD of 1927), in NW1/4SE1/4 sec.23, T.4 N., R.6 E., Clay County, Hydrologic Unit 05120114, on right bank at city of Louisville pumphouse, 0.5 mi downstream from county highway bridge, 0.7 mi downstream from Panther Creek, and at mile 159.0. | |
DRAINAGE AREA.-- 745 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: August 1965 to October 1982. | |
SURFACE-WATER QUALITY | |
CHEMICAL: Water years 1971 to 1991. | |
SEDIMENT: March 1971 to September 1981. | |
REVISED RECORDS.-- WDR IL-73-1: Drainage area. | |
GAGE.-- Water-stage recorder. Datum of gage is 420.51 ft above NGVD of 1929. Prior to Nov. 20, 1972, nonrecording gage at site 0.5 mi upstream at present datum. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 24,000 ft3/s Dec. 22, 1967, gage height, 31.00 ft; minimum daily, 0.5 ft3/s Oct. 5, 1967. | |
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 2,320 mg/L June 3, 1980; minimum daily mean, 4 mg/L Jan. 12, 13, 1979. | |
SUSPENDED-SEDIMENT LOADS: Maximum daily, 29,900 tons Apr. 13, 1979; minimum daily, 0.10 ton Nov. 11, 1978. | |
EXTREMES OUTSIDE PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Flood of January 1950 reached a stage of 36.1 ft, present datum, at the U.S. Highway 45 crossing 0.5 mi north of Louisville and about 1.5 mi upstream from present site. | |