LOCATION.-- Lat 40°40'03", long 89°30'15" (NAD of 1927), in SE1/4NE1/4 sec.36, T.26 N., R.4 W., Tazewell County, Hydrologic Unit 07130001, on right bank at upstream side of bridge, 0.2 mi east of Farmdale, 0.3 mi upstream from Norfolk & Western Railway bridge, 0.3 mi downstream from Toledo, Peoria & Western Railroad bridge, and at mile 5.8.

DRAINAGE AREA.-- 27.4 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1948 to October 1985. March 1986 to current (Seven month periods-March to September).

STAGE: Water years 1994 to current year (Seven month periods-March to September).

PARTIAL RECORD: Miscellaneous discharge measurements, water years 1986-99.

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

GAGE.-- Water-stage recorder, crest-stage gage, and concrete control. Datum of gage is 530.12 ft above NGVD of 1929. Prior to Mar. 5, 2002, water-stage recorder and concrete control at site 400 ft. downstream at same datum.

REMARKS.-- High flow regulated by Farmdale Dam, 1 mi upstream effective Aug. 16, 1951.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Prior to Mar. 5, 2002, maximum gage height, 7.58 ft, Apr. 24, 1950, discharge not determined; maximum discharge prior to Mar. 5, 2002 and after Farmdale Dam (Aug. 16, 1951) 1,050 ft³/s, June 2, 1980, gage height, 4.43 ft; maximum gage height, 6.55 ft, Feb. 20, 1982, ice jam; after Mar. 5, 2002, maximum discharge, 598 ft³/s, May 12, 2002, gage height 9.37 ft; no flow for several days in most years.