LOCATION.-- Lat 40°40'52", long 89°39'19" (NAD of 1927), in NE1/4NW1/4 sec.13, T.8 N., R.7 E., Peoria County, Hydrologic Unit 07130003, at left bank on pier under bridge of State Highway 116, 0.5 mi west of Peoria, 1.5 mi downstream from Dry Run, and 4.0 mi upstream from mouth.

DRAINAGE AREA.-- 297 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: March 1942 to September 1971. Monthly discharge only for some periods, published in WSP 1308.

PARTIAL RECORD: Annual maximum, water years 1972 to current year.

REVISED RECORDS.-- WSP 1035: Drainage area.

GAGE.-- Crest-stage gage. Datum of gage is 448.37 ft. above NGVD of 1929 (levels by Corps of Engineers) (448.05 ft NAVD 1988). Prior to Nov. 19, 1942, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 48,500 ft³/s, June 22, 1974, gage height, 29.68 ft, from slope-area measurement of peak flow; minimum, 0.2 ft³/s Sept. 28, 1963.

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum stage known, 24.6 ft in May 1927 (from information from Corps of Engineers).