LOCATION.-- Lat 39°00'36", long 87°56'44" (NAD of 1927), in NW1/4NW1/4 sec.35, T.7 N., R.14 W., Crawford County, Hydrologic Unit 05120112, on left bank at downstream side of bridge on State Highway 33, 0.8 mi upstream from railroad bridge, 2 mi west of Oblong, and at mile 10.5.

DRAINAGE AREA.-- 318 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1940 to current year.

STAGE: Water years 1994 to current year.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978-91.

GAGE.-- Water-stage recorder, phone telemeter and crest-stage gage. Datum of gage is 456.19 ft above NGVD of 1929 (455.80 ft NAVD 1988). Prior to Dec. 11, 1940, nonrecording gage and Dec. 11, 1940, to Sept. 30, 1964, water-stage recorder at same site at datum 2.00 ft higher. Oct. 8, 1971 to May 15, 1979, water-stage recorder at site 0.8 mi downstream at present datum.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 27,100 ft³/s, Jan. 4, 1950, from rating curve extended above 16,000 ft³/s, gage height, 24.38 ft, present datum; no flow for many days in 1953-54, 1964, 1988.