LOCATION.-- Lat 37°28'20", long 88°32'50" (NAD of 1927), in NW1/4SE1/4 sec.16, T.12 S., R.6 E., Pope County, Hydrologic Unit 05140203, on left bank at upstream side of bridge on County Highway 5, 2.8 mi southeast of Eddyville and at mile 17.7.

DRAINAGE AREA.-- 42.9 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1967 to current year.

STAGE: Water years 1994 to current year.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1979-91. Additional chemical data for water years 1961, 1964, 1969-77 are published in Water-Resources Investigations 78-24 and 79-25 as site AK 02.

SEDIMENT: January 1980 to September 1981.

SPECIFIC CONDUCTANCE: Water years 1980-81.

WATER TEMPERATURE: Water years 1980-81.

REVISED RECORDS.-- WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 360.42 ft above NGVD of 1929.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 16,100 ft³/s, Aug. 24, 1985, from rating curve extended above 23.5 ft, based on contracted-opening measurement, gage height, 27.78 ft; no flow for several days in most years.

SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 299 mg/L May 18, 1981; minimum daily mean, 0 mg/L on many days each year.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 2,340 tons May 18, 1981; minimum daily, 0 ton on many days each year.