LOCATION.-- Lat 41°09'00", long 89°25'00" (NAD of 1927), in SW1/4SE1/4 sec.36, T.14 N., R.9 E., Putnam County, Hydrologic Unit 07130001, on right bank at downstream side of bridge No. 7, 2 mi upstream from Sugar Grove Creek, 2.4 mi west of State Highway 29, and 3.6 mi northwest of Henry.

DRAINAGE AREA.-- 55.3 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: May 1949 to October 1971.

PARTIAL RECORD: Annual maximum, water years 1972 to 1982.

GAGE.-- Water-stage recorder. Datum of gage is 520.61 ft above NGVD of 1929 (Corps of Engineers bench mark) (520.38 ft NAVD 1988).

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 6,930 ft³/s May 14, 1970, gage height, 10.34 ft, from rating curve extended above 600 ft³/s on basis of slope-area measurement of peak flow; no flow at times most years.