LOCATION.-- Lat 40°14'46", long 89°51'40" (NAD of 1927), in NE1/4NW1/4 sec.26, T.21 N., R.7 W., Mason County, Hydrologic Unit 07130008, on right bank at downstream side of highway bridge, 0.1 mi downstream from confluence of Hardin and Central ditches, 1.2 mi upstream from Samuels ditch, and 1.2 mi northwest of Easton.

DRAINAGE AREA.-- 26.5 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1949 to September 1975.

SURFACE-WATER QUALITY

MISCELLANEOUS: Contaminants in streambed sediments, August 1996; contaminants in fish tissue, August 1996.

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

GAGE.-- Water-stage recorder. Datum of gage is 486.78 ft above NGVD of 1929. Prior to Mar. 30, 1950, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 508 ft³/s May 31, 1974, gage height, 8.54 ft; maximum gage height, 9.08 ft Feb. 10, 1959; minimum discharge, 0.4 ft³/s Sept. 20, 1955.