LOCATION.-- Lat 40°35'12", long 89°16'42" (NAD of 1927), in NW1/4NE1/4 sec. 36, T.25 N., R.2 W., Tazewell County, Hydrologic Unit 07130004, at Rocky Ford bridge, 0.5 mi upstream from Rock Creek, 0.8 mi upstream from Hollands Creek, 4.5 mi southwest of Congerville, and at mile 53.7. | |
DRAINAGE AREA.-- 776 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: October 1983 to September 1986. | |
SURFACE-WATER QUALITY | |
CHEMICAL: Water years 1978-91. | |
SEDIMENT: July 1983 to September 1986. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 4,720 mg/L Mar. 28, 1985; minimum daily mean, 1 mg/L Jan. 26 to Feb. 17, 1985. | |
SUSPENDED-SEDIMENT LOADS: Maximum daily, 96,400 tons Feb. 23, 1985; minimum daily, 0.26 ton Feb. 13-17, 1985. | |