LOCATION.-- Lat 41°49'50", long 89°58'00" (NAD of 1927), in SW1/4SE1/4 sec.6, T.21 N., R.5 E., Whiteside County, Hydrologic Unit 07090005, on right bank just downstream from small tributary on right bank, 1.5 mi north of Morrison and 4.5 mi downstream from Little Rock Creek. | |
DRAINAGE AREA.-- 143 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: October 1942 to September 1958. | |
GAGE.-- Water-stage recorder and concrete control. Datum of gage is 620.41 ft above NGVD of 1929 (levels by Corps of Engineers). | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 5,770 ft3/s Jan. 6, 1946, gage height, 9.58 ft; minimum, 6 ft3/s Dec. 11, 1957, result of freeze up. | |
EXTREMES OUTSIDE PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum stage known, 17.7 ft in June 1937, from information by local residents. | |