LOCATION.-- Lat 39°45'38", long 90°07'43" (NAD of 1927), in SE1/4NW1/4 sec.8, T.15 N., R.9 W., Morgan County, Hydrologic Unit 07130011, on left bank at downstream side of bridge on County Road 2550E, 2.5 mi north of Arnold, 4.5 mi upstream from mouth, 6.0 mi east of Jacksonville, and at mile 6.2.

DRAINAGE AREA.-- 29.1 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: December 1949 to September 1975.

PARTIAL RECORD: Annual maximum, water years 1976 to 1990; 1992 to current.

GAGE.-- Crest-stage gage. Datum of gage is 579.27 ft. above NGVD of 1929 (578.88 ft NAVD 1988). Prior to Mar. 29, 1950, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 7,160 ft³/s, Apr. 12, 1994, gage height, 12.35 ft; maximum gage height, 12.77 ft., June 20, 1990, discharge, 4,600 ft³/s; no flow for many days in most years.