LOCATION.-- Lat 40°18'40", long 90°39'31" (NAD of 1927), in SW1/4SW1/4 sec.20, T.4 N., R.2 W., McDonough County, Hydrologic Unit 07130010, on left bank at upstream side of bridge on town road, 3.6 mi southwest of Industry and at mile 10.8.

DRAINAGE AREA.-- 35.5 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1980 to September 1981.

SURFACE-WATER QUALITY

SEDIMENT: Water year 1981.

GAGE.-- Water-stage recorder. Altitude of gage is 570 ft, from NGVD of 1929.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,330 ft³/s May 18, 1981, gage height, 14.00 ft; minimum daily, 0.20 ft³/s Oct. 24, 1980.

SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 5,940 mg/L June 24, 1981; minimum daily mean, 3 mg/L Nov. 3, 4, 1980, Feb. 6-12, 1981.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 6,040 tons June 24, 1981; minimum daily, 0 ton on many days during October and November 1980, February 1981.